/usr/bin/java -Xmx16000000000 -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/word-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 04:57:06,595 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 04:57:06,597 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 04:57:06,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 04:57:06,669 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 [2021-06-05 04:57:06,695 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 04:57:06,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 04:57:06,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 04:57:06,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 04:57:06,697 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 04:57:06,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 04:57:06,697 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 04:57:06,698 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 04:57:06,698 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 04:57:06,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 04:57:06,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 04:57:06,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 04:57:06,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 04:57:06,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 04:57:06,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 04:57:06,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 04:57:06,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 04:57:06,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 04:57:06,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 04:57:06,700 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 04:57:06,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 04:57:06,700 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 04:57:06,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 04:57:06,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 04:57:06,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 04:57:06,993 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 04:57:06,994 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 04:57:06,994 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl [2021-06-05 04:57:06,994 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/word-symm.wvr.bpl' [2021-06-05 04:57:07,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 04:57:07,027 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 04:57:07,027 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 04:57:07,027 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 04:57:07,027 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 04:57:07,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,040 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,044 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 04:57:07,045 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 04:57:07,045 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 04:57:07,045 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 04:57:07,050 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,050 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,053 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,055 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,055 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/1) ... [2021-06-05 04:57:07,056 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 04:57:07,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 04:57:07,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 04:57:07,057 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 04:57:07,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (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 [2021-06-05 04:57:07,134 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 04:57:07,134 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 04:57:07,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 04:57:07,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 04:57:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 04:57:07,135 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 04:57:07,135 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 04:57:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 04:57:07,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 04:57:07,136 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 04:57:07,335 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 04:57:07,335 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 04:57:07,336 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:57:07 BoogieIcfgContainer [2021-06-05 04:57:07,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 04:57:07,337 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 04:57:07,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 04:57:07,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 04:57:07,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 04:57:07" (1/2) ... [2021-06-05 04:57:07,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45dc248d and model type word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 04:57:07, skipping insertion in model container [2021-06-05 04:57:07,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 04:57:07" (2/2) ... [2021-06-05 04:57:07,340 INFO L111 eAbstractionObserver]: Analyzing ICFG word-symm.wvr.bpl [2021-06-05 04:57:07,344 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 04:57:07,344 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 04:57:07,344 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 04:57:07,344 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 04:57:07,361 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 04:57:07,373 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 04:57:07,385 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 04:57:07,385 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 04:57:07,385 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 04:57:07,385 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 04:57:07,385 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 04:57:07,385 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 04:57:07,385 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 04:57:07,385 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 04:57:07,390 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 20 transitions, 56 flow [2021-06-05 04:57:07,397 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:57:07,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:07,402 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:07,402 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash 942627414, now seen corresponding path program 1 times [2021-06-05 04:57:07,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:07,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856644702] [2021-06-05 04:57:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:07,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:07,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:07,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856644702] [2021-06-05 04:57:07,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856644702] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:07,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:07,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:57:07,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323007585] [2021-06-05 04:57:07,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:57:07,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:57:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:57:07,617 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 29 states have internal predecessors, (64), 0 states have call successors, (0), 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 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:07,673 INFO L93 Difference]: Finished difference Result 52 states and 96 transitions. [2021-06-05 04:57:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:57:07,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:57:07,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:07,680 INFO L225 Difference]: With dead ends: 52 [2021-06-05 04:57:07,680 INFO L226 Difference]: Without dead ends: 40 [2021-06-05 04:57:07,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:07,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-06-05 04:57:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-06-05 04:57:07,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 27 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 60 transitions. [2021-06-05 04:57:07,712 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 60 transitions. Word has length 10 [2021-06-05 04:57:07,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:07,713 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 60 transitions. [2021-06-05 04:57:07,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,713 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 60 transitions. [2021-06-05 04:57:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 04:57:07,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:07,714 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:07,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 04:57:07,714 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash 382081942, now seen corresponding path program 2 times [2021-06-05 04:57:07,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:07,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481751743] [2021-06-05 04:57:07,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:07,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:07,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481751743] [2021-06-05 04:57:07,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481751743] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:07,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:07,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 04:57:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805136210] [2021-06-05 04:57:07,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 04:57:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 04:57:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 04:57:07,787 INFO L87 Difference]: Start difference. First operand 28 states and 60 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:07,838 INFO L93 Difference]: Finished difference Result 48 states and 86 transitions. [2021-06-05 04:57:07,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 04:57:07,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 04:57:07,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:07,841 INFO L225 Difference]: With dead ends: 48 [2021-06-05 04:57:07,841 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 04:57:07,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:07,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 04:57:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2021-06-05 04:57:07,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 59 transitions. [2021-06-05 04:57:07,851 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 59 transitions. Word has length 10 [2021-06-05 04:57:07,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:07,851 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 59 transitions. [2021-06-05 04:57:07,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,852 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 59 transitions. [2021-06-05 04:57:07,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 04:57:07,852 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:07,853 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:07,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 04:57:07,853 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:07,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:07,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1385928133, now seen corresponding path program 1 times [2021-06-05 04:57:07,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:07,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525651896] [2021-06-05 04:57:07,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:07,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:07,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:07,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:07,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525651896] [2021-06-05 04:57:07,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525651896] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:07,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:07,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 04:57:07,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979443446] [2021-06-05 04:57:07,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 04:57:07,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:07,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 04:57:07,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:57:07,886 INFO L87 Difference]: Start difference. First operand 28 states and 59 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:07,891 INFO L93 Difference]: Finished difference Result 28 states and 52 transitions. [2021-06-05 04:57:07,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 04:57:07,891 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 04:57:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:07,891 INFO L225 Difference]: With dead ends: 28 [2021-06-05 04:57:07,892 INFO L226 Difference]: Without dead ends: 28 [2021-06-05 04:57:07,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 04:57:07,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-06-05 04:57:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-06-05 04:57:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. 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) [2021-06-05 04:57:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2021-06-05 04:57:07,894 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2021-06-05 04:57:07,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:07,895 INFO L482 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2021-06-05 04:57:07,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2021-06-05 04:57:07,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:57:07,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:07,895 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:07,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 04:57:07,895 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:07,896 INFO L82 PathProgramCache]: Analyzing trace with hash 924188067, now seen corresponding path program 1 times [2021-06-05 04:57:07,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:07,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125593075] [2021-06-05 04:57:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:07,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:07,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:07,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:07,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125593075] [2021-06-05 04:57:07,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125593075] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:07,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:07,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 04:57:07,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759962433] [2021-06-05 04:57:07,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:57:07,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:07,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:57:07,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:57:07,953 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,004 INFO L93 Difference]: Finished difference Result 60 states and 109 transitions. [2021-06-05 04:57:08,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:57:08,004 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-06-05 04:57:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,005 INFO L225 Difference]: With dead ends: 60 [2021-06-05 04:57:08,005 INFO L226 Difference]: Without dead ends: 53 [2021-06-05 04:57:08,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 35.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:57:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-06-05 04:57:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-06-05 04:57:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 37 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 71 transitions. [2021-06-05 04:57:08,009 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 71 transitions. Word has length 12 [2021-06-05 04:57:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,009 INFO L482 AbstractCegarLoop]: Abstraction has 38 states and 71 transitions. [2021-06-05 04:57:08,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 71 transitions. [2021-06-05 04:57:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:57:08,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,010 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 04:57:08,010 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,011 INFO L82 PathProgramCache]: Analyzing trace with hash -28486685, now seen corresponding path program 2 times [2021-06-05 04:57:08,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367555498] [2021-06-05 04:57:08,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367555498] [2021-06-05 04:57:08,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367555498] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:08,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:08,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 04:57:08,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355470751] [2021-06-05 04:57:08,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:57:08,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:08,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:57:08,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:57:08,093 INFO L87 Difference]: Start difference. First operand 38 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,147 INFO L93 Difference]: Finished difference Result 75 states and 133 transitions. [2021-06-05 04:57:08,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:57:08,148 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-06-05 04:57:08,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,150 INFO L225 Difference]: With dead ends: 75 [2021-06-05 04:57:08,150 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 04:57:08,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 64.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:57:08,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 04:57:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 39. [2021-06-05 04:57:08,160 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) [2021-06-05 04:57:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 04:57:08,161 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 12 [2021-06-05 04:57:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,161 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 04:57:08,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 04:57:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:57:08,162 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,162 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 04:57:08,162 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1663097951, now seen corresponding path program 3 times [2021-06-05 04:57:08,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794817204] [2021-06-05 04:57:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794817204] [2021-06-05 04:57:08,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794817204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:08,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:08,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 04:57:08,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078120742] [2021-06-05 04:57:08,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:57:08,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:08,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:57:08,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:57:08,235 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,273 INFO L93 Difference]: Finished difference Result 63 states and 115 transitions. [2021-06-05 04:57:08,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:57:08,274 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-06-05 04:57:08,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,274 INFO L225 Difference]: With dead ends: 63 [2021-06-05 04:57:08,275 INFO L226 Difference]: Without dead ends: 56 [2021-06-05 04:57:08,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:57:08,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-06-05 04:57:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2021-06-05 04:57:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.95) internal successors, (78), 40 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 78 transitions. [2021-06-05 04:57:08,284 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 78 transitions. Word has length 12 [2021-06-05 04:57:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,284 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 78 transitions. [2021-06-05 04:57:08,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,285 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 78 transitions. [2021-06-05 04:57:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:57:08,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,287 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 04:57:08,291 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1716368849, now seen corresponding path program 4 times [2021-06-05 04:57:08,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860728460] [2021-06-05 04:57:08,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860728460] [2021-06-05 04:57:08,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860728460] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:08,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:08,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 04:57:08,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439584127] [2021-06-05 04:57:08,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:57:08,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:08,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:57:08,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:57:08,368 INFO L87 Difference]: Start difference. First operand 41 states and 78 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,414 INFO L93 Difference]: Finished difference Result 81 states and 146 transitions. [2021-06-05 04:57:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:57:08,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-06-05 04:57:08,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,415 INFO L225 Difference]: With dead ends: 81 [2021-06-05 04:57:08,416 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 04:57:08,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:57:08,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 04:57:08,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 43. [2021-06-05 04:57:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 85 transitions. [2021-06-05 04:57:08,424 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 85 transitions. Word has length 12 [2021-06-05 04:57:08,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,425 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 85 transitions. [2021-06-05 04:57:08,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,425 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 85 transitions. [2021-06-05 04:57:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:57:08,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,429 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 04:57:08,429 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,430 INFO L82 PathProgramCache]: Analyzing trace with hash -887013811, now seen corresponding path program 5 times [2021-06-05 04:57:08,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941732905] [2021-06-05 04:57:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941732905] [2021-06-05 04:57:08,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941732905] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:08,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:08,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 04:57:08,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871594925] [2021-06-05 04:57:08,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:57:08,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:08,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:57:08,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:57:08,493 INFO L87 Difference]: Start difference. First operand 43 states and 85 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,536 INFO L93 Difference]: Finished difference Result 83 states and 148 transitions. [2021-06-05 04:57:08,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:57:08,536 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-06-05 04:57:08,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,537 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:57:08,537 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:57:08,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:57:08,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:57:08,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 42. [2021-06-05 04:57:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 41 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 81 transitions. [2021-06-05 04:57:08,546 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 81 transitions. Word has length 12 [2021-06-05 04:57:08,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,547 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 81 transitions. [2021-06-05 04:57:08,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,547 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 81 transitions. [2021-06-05 04:57:08,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 04:57:08,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,547 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-05 04:57:08,547 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1520341375, now seen corresponding path program 6 times [2021-06-05 04:57:08,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823864460] [2021-06-05 04:57:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823864460] [2021-06-05 04:57:08,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823864460] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:08,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:08,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 04:57:08,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067633243] [2021-06-05 04:57:08,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:57:08,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:08,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:57:08,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:57:08,583 INFO L87 Difference]: Start difference. First operand 42 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,621 INFO L93 Difference]: Finished difference Result 68 states and 124 transitions. [2021-06-05 04:57:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 04:57:08,622 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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 [2021-06-05 04:57:08,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,622 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:57:08,622 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 04:57:08,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.1ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:57:08,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 04:57:08,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 44. [2021-06-05 04:57:08,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.9534883720930232) internal successors, (84), 43 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 84 transitions. [2021-06-05 04:57:08,625 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 84 transitions. Word has length 12 [2021-06-05 04:57:08,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,625 INFO L482 AbstractCegarLoop]: Abstraction has 44 states and 84 transitions. [2021-06-05 04:57:08,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 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) [2021-06-05 04:57:08,625 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 84 transitions. [2021-06-05 04:57:08,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:08,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,625 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 04:57:08,626 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2043306169, now seen corresponding path program 1 times [2021-06-05 04:57:08,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794581516] [2021-06-05 04:57:08,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794581516] [2021-06-05 04:57:08,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794581516] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:08,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:08,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:08,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897454414] [2021-06-05 04:57:08,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:08,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:08,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:08,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:08,664 INFO L87 Difference]: Start difference. First operand 44 states and 84 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,709 INFO L93 Difference]: Finished difference Result 62 states and 113 transitions. [2021-06-05 04:57:08,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,710 INFO L225 Difference]: With dead ends: 62 [2021-06-05 04:57:08,710 INFO L226 Difference]: Without dead ends: 54 [2021-06-05 04:57:08,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-06-05 04:57:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 39. [2021-06-05 04:57:08,714 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) [2021-06-05 04:57:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 04:57:08,715 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 04:57:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,715 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 04:57:08,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:08,715 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 04:57:08,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:08,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,716 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:08,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-05 04:57:08,716 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:08,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:08,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1561333194, now seen corresponding path program 1 times [2021-06-05 04:57:08,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:08,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125388302] [2021-06-05 04:57:08,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:08,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125388302] [2021-06-05 04:57:08,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125388302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:08,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030483407] [2021-06-05 04:57:08,745 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 [2021-06-05 04:57:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:08,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:57:08,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:08,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:08,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030483407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:08,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:08,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-05 04:57:08,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346296032] [2021-06-05 04:57:08,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 04:57:08,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:08,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 04:57:08,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 04:57:08,898 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:08,931 INFO L93 Difference]: Finished difference Result 58 states and 109 transitions. [2021-06-05 04:57:08,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:08,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:08,932 INFO L225 Difference]: With dead ends: 58 [2021-06-05 04:57:08,932 INFO L226 Difference]: Without dead ends: 58 [2021-06-05 04:57:08,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:57:08,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-06-05 04:57:08,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 40. [2021-06-05 04:57:08,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 39 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 77 transitions. [2021-06-05 04:57:08,934 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 77 transitions. Word has length 13 [2021-06-05 04:57:08,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:08,934 INFO L482 AbstractCegarLoop]: Abstraction has 40 states and 77 transitions. [2021-06-05 04:57:08,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:08,934 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 77 transitions. [2021-06-05 04:57:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:08,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:08,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:09,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 04:57:09,145 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1719807367, now seen corresponding path program 2 times [2021-06-05 04:57:09,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:09,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602891796] [2021-06-05 04:57:09,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:09,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:09,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602891796] [2021-06-05 04:57:09,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602891796] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:09,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:09,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:09,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745227236] [2021-06-05 04:57:09,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:09,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:09,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:09,185 INFO L87 Difference]: Start difference. First operand 40 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:09,222 INFO L93 Difference]: Finished difference Result 79 states and 142 transitions. [2021-06-05 04:57:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:09,223 INFO L225 Difference]: With dead ends: 79 [2021-06-05 04:57:09,223 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:57:09,223 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.5ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:09,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:57:09,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 45. [2021-06-05 04:57:09,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-06-05 04:57:09,226 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-06-05 04:57:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:09,226 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-06-05 04:57:09,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-06-05 04:57:09,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:09,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:09,227 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:09,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 04:57:09,227 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:09,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:09,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1972962632, now seen corresponding path program 2 times [2021-06-05 04:57:09,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:09,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251730591] [2021-06-05 04:57:09,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:09,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:09,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251730591] [2021-06-05 04:57:09,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251730591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:09,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537213293] [2021-06-05 04:57:09,260 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 [2021-06-05 04:57:09,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:09,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:09,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:57:09,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537213293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:09,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:09,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 04:57:09,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575301026] [2021-06-05 04:57:09,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:57:09,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:57:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:09,373 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:09,403 INFO L93 Difference]: Finished difference Result 69 states and 128 transitions. [2021-06-05 04:57:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:09,404 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:09,405 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:57:09,405 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:57:09,406 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.5ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:57:09,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:57:09,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 45. [2021-06-05 04:57:09,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 89 transitions. [2021-06-05 04:57:09,409 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 89 transitions. Word has length 13 [2021-06-05 04:57:09,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:09,409 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 89 transitions. [2021-06-05 04:57:09,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,410 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 89 transitions. [2021-06-05 04:57:09,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:09,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:09,410 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:09,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 04:57:09,626 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:09,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:09,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1874666941, now seen corresponding path program 3 times [2021-06-05 04:57:09,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:09,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583816400] [2021-06-05 04:57:09,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:09,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:09,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583816400] [2021-06-05 04:57:09,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583816400] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:09,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:09,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:09,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330988476] [2021-06-05 04:57:09,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:09,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:09,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:09,651 INFO L87 Difference]: Start difference. First operand 45 states and 89 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:09,689 INFO L93 Difference]: Finished difference Result 64 states and 121 transitions. [2021-06-05 04:57:09,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:09,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:09,690 INFO L225 Difference]: With dead ends: 64 [2021-06-05 04:57:09,690 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 04:57:09,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:09,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 04:57:09,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-06-05 04:57:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 83 transitions. [2021-06-05 04:57:09,692 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 83 transitions. Word has length 13 [2021-06-05 04:57:09,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:09,692 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 83 transitions. [2021-06-05 04:57:09,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,692 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 83 transitions. [2021-06-05 04:57:09,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:09,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:09,692 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:09,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-05 04:57:09,692 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:09,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:09,693 INFO L82 PathProgramCache]: Analyzing trace with hash -108130304, now seen corresponding path program 3 times [2021-06-05 04:57:09,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:09,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402618643] [2021-06-05 04:57:09,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:09,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402618643] [2021-06-05 04:57:09,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402618643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:09,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:09,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:09,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663055505] [2021-06-05 04:57:09,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:09,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:09,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:09,729 INFO L87 Difference]: Start difference. First operand 42 states and 83 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:09,755 INFO L93 Difference]: Finished difference Result 47 states and 89 transitions. [2021-06-05 04:57:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:09,756 INFO L225 Difference]: With dead ends: 47 [2021-06-05 04:57:09,756 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 04:57:09,756 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:09,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 04:57:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-06-05 04:57:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.0) internal successors, (82), 41 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 82 transitions. [2021-06-05 04:57:09,758 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 82 transitions. Word has length 13 [2021-06-05 04:57:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:09,758 INFO L482 AbstractCegarLoop]: Abstraction has 42 states and 82 transitions. [2021-06-05 04:57:09,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 82 transitions. [2021-06-05 04:57:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:09,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:09,758 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:09,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-05 04:57:09,758 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:09,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:09,759 INFO L82 PathProgramCache]: Analyzing trace with hash 831106635, now seen corresponding path program 4 times [2021-06-05 04:57:09,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:09,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856549273] [2021-06-05 04:57:09,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:09,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:09,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:09,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856549273] [2021-06-05 04:57:09,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856549273] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:09,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:09,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:09,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357472877] [2021-06-05 04:57:09,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:09,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:09,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:09,786 INFO L87 Difference]: Start difference. First operand 42 states and 82 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:09,815 INFO L93 Difference]: Finished difference Result 62 states and 111 transitions. [2021-06-05 04:57:09,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:09,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:09,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:09,815 INFO L225 Difference]: With dead ends: 62 [2021-06-05 04:57:09,815 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:57:09,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:57:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2021-06-05 04:57:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 04:57:09,817 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 04:57:09,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:09,817 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 04:57:09,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:09,817 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 04:57:09,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:09,817 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:09,817 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:09,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-05 04:57:09,818 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:09,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:09,818 INFO L82 PathProgramCache]: Analyzing trace with hash 577951370, now seen corresponding path program 4 times [2021-06-05 04:57:09,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:09,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370103842] [2021-06-05 04:57:09,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:09,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:09,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370103842] [2021-06-05 04:57:09,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370103842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:09,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455992871] [2021-06-05 04:57:09,843 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 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 [2021-06-05 04:57:09,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 04:57:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:09,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455992871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:09,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:09,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 04:57:09,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227468039] [2021-06-05 04:57:09,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 04:57:09,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:09,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 04:57:09,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:09,925 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:09,965 INFO L93 Difference]: Finished difference Result 63 states and 116 transitions. [2021-06-05 04:57:09,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:09,965 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:09,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:09,966 INFO L225 Difference]: With dead ends: 63 [2021-06-05 04:57:09,966 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 04:57:09,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 04:57:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 04:57:09,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2021-06-05 04:57:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 04:57:09,969 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 04:57:09,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:09,969 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 04:57:09,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:09,969 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 04:57:09,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:09,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:09,969 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:10,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 04:57:10,185 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:10,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:10,186 INFO L82 PathProgramCache]: Analyzing trace with hash 130613647, now seen corresponding path program 5 times [2021-06-05 04:57:10,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:10,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068982526] [2021-06-05 04:57:10,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:10,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:10,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068982526] [2021-06-05 04:57:10,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068982526] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:10,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:10,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:10,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087898500] [2021-06-05 04:57:10,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:10,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:10,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:10,210 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:10,241 INFO L93 Difference]: Finished difference Result 62 states and 114 transitions. [2021-06-05 04:57:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:10,242 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:10,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:10,242 INFO L225 Difference]: With dead ends: 62 [2021-06-05 04:57:10,242 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 04:57:10,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.0ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:10,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 04:57:10,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2021-06-05 04:57:10,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.0) internal successors, (90), 45 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:10,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 90 transitions. [2021-06-05 04:57:10,243 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 90 transitions. Word has length 13 [2021-06-05 04:57:10,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:10,244 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 90 transitions. [2021-06-05 04:57:10,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,244 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 90 transitions. [2021-06-05 04:57:10,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:10,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:10,244 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:10,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-05 04:57:10,244 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:10,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:10,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1852183598, now seen corresponding path program 5 times [2021-06-05 04:57:10,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:10,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836660360] [2021-06-05 04:57:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:10,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:10,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836660360] [2021-06-05 04:57:10,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836660360] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:10,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:10,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:10,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915167309] [2021-06-05 04:57:10,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:10,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:10,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:10,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:10,269 INFO L87 Difference]: Start difference. First operand 46 states and 90 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:10,304 INFO L93 Difference]: Finished difference Result 65 states and 117 transitions. [2021-06-05 04:57:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:10,304 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:10,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:10,305 INFO L225 Difference]: With dead ends: 65 [2021-06-05 04:57:10,305 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 04:57:10,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:10,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 04:57:10,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2021-06-05 04:57:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.9772727272727273) internal successors, (87), 44 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:10,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 87 transitions. [2021-06-05 04:57:10,306 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 87 transitions. Word has length 13 [2021-06-05 04:57:10,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:10,306 INFO L482 AbstractCegarLoop]: Abstraction has 45 states and 87 transitions. [2021-06-05 04:57:10,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 87 transitions. [2021-06-05 04:57:10,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:10,307 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:10,307 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:10,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 04:57:10,307 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash 133239423, now seen corresponding path program 6 times [2021-06-05 04:57:10,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:10,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882180313] [2021-06-05 04:57:10,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:10,339 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:10,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882180313] [2021-06-05 04:57:10,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882180313] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:10,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:10,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:10,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216948535] [2021-06-05 04:57:10,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:10,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:10,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:10,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:10,340 INFO L87 Difference]: Start difference. First operand 45 states and 87 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:10,371 INFO L93 Difference]: Finished difference Result 60 states and 108 transitions. [2021-06-05 04:57:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:10,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:10,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:10,372 INFO L225 Difference]: With dead ends: 60 [2021-06-05 04:57:10,372 INFO L226 Difference]: Without dead ends: 60 [2021-06-05 04:57:10,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:10,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-06-05 04:57:10,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2021-06-05 04:57:10,373 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) [2021-06-05 04:57:10,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 75 transitions. [2021-06-05 04:57:10,374 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 75 transitions. Word has length 13 [2021-06-05 04:57:10,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:10,374 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 75 transitions. [2021-06-05 04:57:10,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 75 transitions. [2021-06-05 04:57:10,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 04:57:10,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:10,376 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:10,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-05 04:57:10,376 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:10,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:10,376 INFO L82 PathProgramCache]: Analyzing trace with hash -238616864, now seen corresponding path program 6 times [2021-06-05 04:57:10,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:10,376 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125135218] [2021-06-05 04:57:10,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:10,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125135218] [2021-06-05 04:57:10,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125135218] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 04:57:10,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 04:57:10,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 04:57:10,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275484091] [2021-06-05 04:57:10,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 04:57:10,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:10,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 04:57:10,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 04:57:10,406 INFO L87 Difference]: Start difference. First operand 39 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:10,434 INFO L93 Difference]: Finished difference Result 43 states and 79 transitions. [2021-06-05 04:57:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 04:57:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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 [2021-06-05 04:57:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:10,435 INFO L225 Difference]: With dead ends: 43 [2021-06-05 04:57:10,435 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 04:57:10,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.4ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-05 04:57:10,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 04:57:10,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-06-05 04:57:10,437 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) [2021-06-05 04:57:10,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 74 transitions. [2021-06-05 04:57:10,437 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 74 transitions. Word has length 13 [2021-06-05 04:57:10,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:10,437 INFO L482 AbstractCegarLoop]: Abstraction has 39 states and 74 transitions. [2021-06-05 04:57:10,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 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) [2021-06-05 04:57:10,437 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 74 transitions. [2021-06-05 04:57:10,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:10,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:10,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:10,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-05 04:57:10,438 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:10,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash 319968626, now seen corresponding path program 1 times [2021-06-05 04:57:10,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:10,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999873858] [2021-06-05 04:57:10,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:10,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999873858] [2021-06-05 04:57:10,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999873858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:10,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820226907] [2021-06-05 04:57:10,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-05 04:57:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:10,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:10,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:10,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:10,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820226907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:10,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:10,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:57:10,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369207390] [2021-06-05 04:57:10,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:57:10,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:10,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:57:10,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:57:10,973 INFO L87 Difference]: Start difference. First operand 39 states and 74 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:11,339 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 04:57:11,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:11,348 INFO L93 Difference]: Finished difference Result 78 states and 144 transitions. [2021-06-05 04:57:11,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:11,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:11,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:11,349 INFO L225 Difference]: With dead ends: 78 [2021-06-05 04:57:11,349 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 04:57:11,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 505.7ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 04:57:11,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2021-06-05 04:57:11,352 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) [2021-06-05 04:57:11,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 93 transitions. [2021-06-05 04:57:11,352 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 93 transitions. Word has length 14 [2021-06-05 04:57:11,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:11,354 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 93 transitions. [2021-06-05 04:57:11,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:11,354 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 93 transitions. [2021-06-05 04:57:11,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:11,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:11,354 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:11,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:11,570 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:11,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:11,570 INFO L82 PathProgramCache]: Analyzing trace with hash 851822386, now seen corresponding path program 2 times [2021-06-05 04:57:11,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:11,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203173934] [2021-06-05 04:57:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:11,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:11,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203173934] [2021-06-05 04:57:11,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203173934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:11,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52587702] [2021-06-05 04:57:11,703 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:57:11,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:11,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:11,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:11,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:11,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52587702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:11,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:11,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:57:11,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044385965] [2021-06-05 04:57:11,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:11,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:11,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:11,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:11,900 INFO L87 Difference]: Start difference. First operand 49 states and 93 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:12,120 INFO L93 Difference]: Finished difference Result 82 states and 152 transitions. [2021-06-05 04:57:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:12,121 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:12,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:12,121 INFO L225 Difference]: With dead ends: 82 [2021-06-05 04:57:12,121 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:57:12,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:57:12,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 50. [2021-06-05 04:57:12,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.9591836734693877) internal successors, (96), 49 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 96 transitions. [2021-06-05 04:57:12,123 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 96 transitions. Word has length 14 [2021-06-05 04:57:12,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:12,123 INFO L482 AbstractCegarLoop]: Abstraction has 50 states and 96 transitions. [2021-06-05 04:57:12,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,123 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 96 transitions. [2021-06-05 04:57:12,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:12,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:12,123 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:12,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 04:57:12,333 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:12,333 INFO L82 PathProgramCache]: Analyzing trace with hash 151329398, now seen corresponding path program 3 times [2021-06-05 04:57:12,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:12,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732515719] [2021-06-05 04:57:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:12,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:12,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:12,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:12,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732515719] [2021-06-05 04:57:12,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732515719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:12,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479315218] [2021-06-05 04:57:12,455 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 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 [2021-06-05 04:57:12,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:57:12,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:12,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:12,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:12,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:12,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479315218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:12,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:12,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:57:12,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428444383] [2021-06-05 04:57:12,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:57:12,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:12,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:57:12,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:57:12,593 INFO L87 Difference]: Start difference. First operand 50 states and 96 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:12,878 INFO L93 Difference]: Finished difference Result 95 states and 173 transitions. [2021-06-05 04:57:12,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:57:12,879 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:12,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:12,879 INFO L225 Difference]: With dead ends: 95 [2021-06-05 04:57:12,879 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:57:12,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:12,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:57:12,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 51. [2021-06-05 04:57:12,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 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) [2021-06-05 04:57:12,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-06-05 04:57:12,881 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-06-05 04:57:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:12,881 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-06-05 04:57:12,881 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-06-05 04:57:12,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:12,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:12,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:13,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 04:57:13,097 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:13,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:13,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1842914034, now seen corresponding path program 4 times [2021-06-05 04:57:13,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:13,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404684850] [2021-06-05 04:57:13,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:13,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:13,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404684850] [2021-06-05 04:57:13,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404684850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344117291] [2021-06-05 04:57:13,211 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 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 [2021-06-05 04:57:13,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:13,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:13,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344117291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:13,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:13,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-05 04:57:13,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625379140] [2021-06-05 04:57:13,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 04:57:13,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:13,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 04:57:13,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-05 04:57:13,366 INFO L87 Difference]: Start difference. First operand 51 states and 100 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:13,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:13,657 INFO L93 Difference]: Finished difference Result 83 states and 155 transitions. [2021-06-05 04:57:13,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:57:13,657 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:13,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:13,658 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:57:13,658 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:57:13,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 338.1ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:57:13,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 51. [2021-06-05 04:57:13,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.0) internal successors, (100), 50 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) [2021-06-05 04:57:13,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 100 transitions. [2021-06-05 04:57:13,659 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 100 transitions. Word has length 14 [2021-06-05 04:57:13,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:13,659 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 100 transitions. [2021-06-05 04:57:13,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 9 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:13,659 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 100 transitions. [2021-06-05 04:57:13,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:13,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:13,660 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:13,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 04:57:13,875 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:13,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:13,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1869019580, now seen corresponding path program 5 times [2021-06-05 04:57:13,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:13,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036014909] [2021-06-05 04:57:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:13,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:14,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:14,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036014909] [2021-06-05 04:57:14,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036014909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:14,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379027837] [2021-06-05 04:57:14,026 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 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 [2021-06-05 04:57:14,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:14,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:14,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:14,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379027837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:14,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:14,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:57:14,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029680283] [2021-06-05 04:57:14,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:14,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:14,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:14,206 INFO L87 Difference]: Start difference. First operand 51 states and 100 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) [2021-06-05 04:57:14,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:14,460 INFO L93 Difference]: Finished difference Result 68 states and 129 transitions. [2021-06-05 04:57:14,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:14,461 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 [2021-06-05 04:57:14,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:14,461 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:57:14,461 INFO L226 Difference]: Without dead ends: 61 [2021-06-05 04:57:14,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 389.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-06-05 04:57:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2021-06-05 04:57:14,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:14,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 04:57:14,463 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-06-05 04:57:14,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:14,463 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 04:57:14,463 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) [2021-06-05 04:57:14,463 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 04:57:14,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:14,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:14,463 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:14,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 04:57:14,681 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:14,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:14,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1725454728, now seen corresponding path program 6 times [2021-06-05 04:57:14,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:14,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435705018] [2021-06-05 04:57:14,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:14,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:14,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435705018] [2021-06-05 04:57:14,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435705018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:14,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492287086] [2021-06-05 04:57:14,848 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:57:14,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:14,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:14,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:14,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:15,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492287086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:15,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:15,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:57:15,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454471137] [2021-06-05 04:57:15,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:15,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:15,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:15,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:15,182 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:15,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:15,326 INFO L93 Difference]: Finished difference Result 83 states and 153 transitions. [2021-06-05 04:57:15,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:15,326 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 14 [2021-06-05 04:57:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:15,327 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:57:15,327 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:57:15,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 304.9ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:15,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:57:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 54. [2021-06-05 04:57:15,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:15,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-06-05 04:57:15,331 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-06-05 04:57:15,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:15,332 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-06-05 04:57:15,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:15,332 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-06-05 04:57:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:15,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:15,332 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:15,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:15,545 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash -877927932, now seen corresponding path program 7 times [2021-06-05 04:57:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:15,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906487179] [2021-06-05 04:57:15,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:15,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:15,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:15,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906487179] [2021-06-05 04:57:15,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906487179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:15,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007550377] [2021-06-05 04:57:15,772 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 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 [2021-06-05 04:57:15,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:15,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:16,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:16,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007550377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:16,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:16,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:57:16,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184069525] [2021-06-05 04:57:16,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:16,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:16,029 INFO L87 Difference]: Start difference. First operand 54 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:16,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:16,324 INFO L93 Difference]: Finished difference Result 71 states and 135 transitions. [2021-06-05 04:57:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:16,325 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 14 [2021-06-05 04:57:16,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:16,325 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:57:16,325 INFO L226 Difference]: Without dead ends: 64 [2021-06-05 04:57:16,325 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 494.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:16,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-06-05 04:57:16,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 52. [2021-06-05 04:57:16,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-06-05 04:57:16,327 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 14 [2021-06-05 04:57:16,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:16,327 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-06-05 04:57:16,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:16,327 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-06-05 04:57:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:16,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:16,327 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:16,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-05 04:57:16,543 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:16,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:16,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1190224926, now seen corresponding path program 8 times [2021-06-05 04:57:16,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:16,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121021705] [2021-06-05 04:57:16,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:16,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:16,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:16,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121021705] [2021-06-05 04:57:16,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121021705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:16,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744638253] [2021-06-05 04:57:16,740 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 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 [2021-06-05 04:57:16,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:16,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:16,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:16,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:17,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744638253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:17,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:17,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:57:17,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510197259] [2021-06-05 04:57:17,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:17,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:17,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:17,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:17,201 INFO L87 Difference]: Start difference. First operand 52 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:17,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:17,417 INFO L93 Difference]: Finished difference Result 79 states and 146 transitions. [2021-06-05 04:57:17,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:17,417 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 14 [2021-06-05 04:57:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:17,418 INFO L225 Difference]: With dead ends: 79 [2021-06-05 04:57:17,418 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 04:57:17,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 359.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 04:57:17,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-06-05 04:57:17,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.056603773584906) internal successors, (109), 53 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:17,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 109 transitions. [2021-06-05 04:57:17,419 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 109 transitions. Word has length 14 [2021-06-05 04:57:17,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:17,419 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 109 transitions. [2021-06-05 04:57:17,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:17,420 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 109 transitions. [2021-06-05 04:57:17,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:17,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:17,420 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:17,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 04:57:17,636 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:17,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:17,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1413157734, now seen corresponding path program 9 times [2021-06-05 04:57:17,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:17,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046017232] [2021-06-05 04:57:17,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:17,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:17,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:17,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:17,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046017232] [2021-06-05 04:57:17,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046017232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:17,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217425705] [2021-06-05 04:57:17,844 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 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 [2021-06-05 04:57:17,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:57:17,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:17,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:18,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217425705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:18,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:18,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:57:18,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228544294] [2021-06-05 04:57:18,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:18,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:18,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:18,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:18,377 INFO L87 Difference]: Start difference. First operand 54 states and 109 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) [2021-06-05 04:57:18,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:18,621 INFO L93 Difference]: Finished difference Result 81 states and 148 transitions. [2021-06-05 04:57:18,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:18,622 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 14 [2021-06-05 04:57:18,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:18,622 INFO L225 Difference]: With dead ends: 81 [2021-06-05 04:57:18,622 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 04:57:18,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:18,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 04:57:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2021-06-05 04:57:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:18,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 04:57:18,624 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 14 [2021-06-05 04:57:18,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:18,624 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 04:57:18,624 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) [2021-06-05 04:57:18,624 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 04:57:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:18,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:18,624 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:18,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 04:57:18,855 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:18,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:18,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1239910042, now seen corresponding path program 10 times [2021-06-05 04:57:18,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:18,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314694944] [2021-06-05 04:57:18,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:18,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:18,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314694944] [2021-06-05 04:57:18,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314694944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:18,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855642841] [2021-06-05 04:57:18,979 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:19,017 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:19,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:19,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:19,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:19,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855642841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:19,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:19,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:57:19,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983901796] [2021-06-05 04:57:19,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:19,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:19,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:19,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:19,348 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:57:19,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:19,488 INFO L93 Difference]: Finished difference Result 66 states and 124 transitions. [2021-06-05 04:57:19,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:19,488 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 [2021-06-05 04:57:19,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:19,488 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:57:19,488 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:57:19,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 280.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:19,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:57:19,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2021-06-05 04:57:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:19,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-06-05 04:57:19,490 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-06-05 04:57:19,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:19,490 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-06-05 04:57:19,490 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:57:19,490 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-06-05 04:57:19,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:19,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:19,490 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:19,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 04:57:19,705 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:19,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:19,707 INFO L82 PathProgramCache]: Analyzing trace with hash -100096846, now seen corresponding path program 11 times [2021-06-05 04:57:19,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:19,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346836137] [2021-06-05 04:57:19,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:19,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:19,854 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:19,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346836137] [2021-06-05 04:57:19,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346836137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:19,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198033285] [2021-06-05 04:57:19,854 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 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 [2021-06-05 04:57:19,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:19,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:19,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:19,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:20,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198033285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:20,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:20,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:57:20,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119536401] [2021-06-05 04:57:20,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:20,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:20,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:20,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:20,054 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2021-06-05 04:57:20,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:20,317 INFO L93 Difference]: Finished difference Result 72 states and 137 transitions. [2021-06-05 04:57:20,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:20,317 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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 14 [2021-06-05 04:57:20,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:20,318 INFO L225 Difference]: With dead ends: 72 [2021-06-05 04:57:20,318 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 04:57:20,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 392.2ms TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 04:57:20,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2021-06-05 04:57:20,319 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) [2021-06-05 04:57:20,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 04:57:20,319 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-06-05 04:57:20,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:20,319 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 04:57:20,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 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) [2021-06-05 04:57:20,320 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 04:57:20,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:20,320 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:20,320 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:20,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:20,529 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:20,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:20,529 INFO L82 PathProgramCache]: Analyzing trace with hash -800589834, now seen corresponding path program 12 times [2021-06-05 04:57:20,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:20,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496949276] [2021-06-05 04:57:20,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:20,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:20,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:20,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496949276] [2021-06-05 04:57:20,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496949276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:20,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710773391] [2021-06-05 04:57:20,709 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:20,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:20,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:20,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:20,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:21,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:21,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710773391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:21,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:21,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:57:21,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726960229] [2021-06-05 04:57:21,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:21,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:21,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:21,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:21,092 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:21,237 INFO L93 Difference]: Finished difference Result 87 states and 161 transitions. [2021-06-05 04:57:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 14 [2021-06-05 04:57:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:21,237 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:57:21,237 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:57:21,238 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 285.3ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:57:21,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2021-06-05 04:57:21,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-06-05 04:57:21,239 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-06-05 04:57:21,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:21,239 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-06-05 04:57:21,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:21,239 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-06-05 04:57:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:21,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:21,239 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:21,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable469 [2021-06-05 04:57:21,453 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash 890994802, now seen corresponding path program 13 times [2021-06-05 04:57:21,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:21,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306044553] [2021-06-05 04:57:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:21,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:21,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306044553] [2021-06-05 04:57:21,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306044553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:21,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280087703] [2021-06-05 04:57:21,685 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:57:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:21,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:21,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280087703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:21,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:21,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:57:21,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48860718] [2021-06-05 04:57:21,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:21,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:21,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:21,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:21,930 INFO L87 Difference]: Start difference. First operand 57 states and 115 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:22,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:22,296 INFO L93 Difference]: Finished difference Result 75 states and 143 transitions. [2021-06-05 04:57:22,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:22,296 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 14 [2021-06-05 04:57:22,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:22,297 INFO L225 Difference]: With dead ends: 75 [2021-06-05 04:57:22,297 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 04:57:22,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 04:57:22,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2021-06-05 04:57:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0) internal successors, (108), 54 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 108 transitions. [2021-06-05 04:57:22,298 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 108 transitions. Word has length 14 [2021-06-05 04:57:22,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:22,298 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 108 transitions. [2021-06-05 04:57:22,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 108 transitions. [2021-06-05 04:57:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:22,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:22,299 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:22,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:22,499 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:22,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:22,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1335819636, now seen corresponding path program 14 times [2021-06-05 04:57:22,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:22,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297056667] [2021-06-05 04:57:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:22,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297056667] [2021-06-05 04:57:22,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297056667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:22,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066683961] [2021-06-05 04:57:22,764 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 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 [2021-06-05 04:57:22,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:22,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:22,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:22,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:23,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066683961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:23,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:23,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:57:23,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975734232] [2021-06-05 04:57:23,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:23,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:23,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:23,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:23,051 INFO L87 Difference]: Start difference. First operand 55 states and 108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:23,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:23,276 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-06-05 04:57:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:23,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 14 [2021-06-05 04:57:23,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:23,277 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:57:23,277 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:57:23,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:57:23,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 57. [2021-06-05 04:57:23,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0535714285714284) internal successors, (115), 56 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:23,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 115 transitions. [2021-06-05 04:57:23,279 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 115 transitions. Word has length 14 [2021-06-05 04:57:23,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:23,280 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 115 transitions. [2021-06-05 04:57:23,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:23,280 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 115 transitions. [2021-06-05 04:57:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:23,280 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:23,280 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:23,493 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:23,493 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:23,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:23,493 INFO L82 PathProgramCache]: Analyzing trace with hash 355765000, now seen corresponding path program 15 times [2021-06-05 04:57:23,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:23,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199929247] [2021-06-05 04:57:23,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:23,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:23,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199929247] [2021-06-05 04:57:23,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199929247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:23,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017824212] [2021-06-05 04:57:23,692 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 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 [2021-06-05 04:57:23,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:57:23,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:23,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:23,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:23,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017824212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:23,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:23,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-05 04:57:23,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807120259] [2021-06-05 04:57:23,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:23,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:23,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:23,973 INFO L87 Difference]: Start difference. First operand 57 states and 115 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) [2021-06-05 04:57:24,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:24,212 INFO L93 Difference]: Finished difference Result 85 states and 156 transitions. [2021-06-05 04:57:24,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:24,212 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 14 [2021-06-05 04:57:24,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:24,213 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:57:24,213 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:57:24,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 444.8ms TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:24,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:57:24,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2021-06-05 04:57:24,214 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) [2021-06-05 04:57:24,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 04:57:24,215 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 14 [2021-06-05 04:57:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:24,215 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 04:57:24,215 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) [2021-06-05 04:57:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 04:57:24,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:24,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:24,215 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:24,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:24,425 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:24,425 INFO L82 PathProgramCache]: Analyzing trace with hash 529012692, now seen corresponding path program 16 times [2021-06-05 04:57:24,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:24,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455590787] [2021-06-05 04:57:24,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:24,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:24,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455590787] [2021-06-05 04:57:24,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455590787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:24,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288783641] [2021-06-05 04:57:24,544 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 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 [2021-06-05 04:57:24,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:24,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:24,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:24,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:24,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:24,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288783641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:24,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:24,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:57:24,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986730963] [2021-06-05 04:57:24,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:24,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:24,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:24,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:24,865 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:57:25,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:25,061 INFO L93 Difference]: Finished difference Result 70 states and 132 transitions. [2021-06-05 04:57:25,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:25,061 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 [2021-06-05 04:57:25,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:25,061 INFO L225 Difference]: With dead ends: 70 [2021-06-05 04:57:25,062 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 04:57:25,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 350.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:25,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 04:57:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-06-05 04:57:25,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.0) internal successors, (106), 53 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 106 transitions. [2021-06-05 04:57:25,063 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 106 transitions. Word has length 14 [2021-06-05 04:57:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:25,063 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 106 transitions. [2021-06-05 04:57:25,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:57:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 106 transitions. [2021-06-05 04:57:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:25,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:25,063 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:25,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable669,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:25,273 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:25,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1254420580, now seen corresponding path program 17 times [2021-06-05 04:57:25,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:25,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171450784] [2021-06-05 04:57:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:25,455 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:25,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:25,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171450784] [2021-06-05 04:57:25,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171450784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:25,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553554217] [2021-06-05 04:57:25,455 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 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 [2021-06-05 04:57:25,478 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:25,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:25,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:25,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:25,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553554217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:25,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:25,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:57:25,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582172857] [2021-06-05 04:57:25,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:25,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:25,583 INFO L87 Difference]: Start difference. First operand 54 states and 106 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:25,904 INFO L93 Difference]: Finished difference Result 103 states and 190 transitions. [2021-06-05 04:57:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:57:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:25,905 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:57:25,905 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:57:25,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 436.1ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:25,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:57:25,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 57. [2021-06-05 04:57:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.0714285714285716) internal successors, (116), 56 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) [2021-06-05 04:57:25,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 116 transitions. [2021-06-05 04:57:25,908 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 116 transitions. Word has length 14 [2021-06-05 04:57:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:25,908 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 116 transitions. [2021-06-05 04:57:25,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:25,908 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 116 transitions. [2021-06-05 04:57:25,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:25,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:25,909 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:26,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 04:57:26,121 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:26,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:26,121 INFO L82 PathProgramCache]: Analyzing trace with hash 437164056, now seen corresponding path program 18 times [2021-06-05 04:57:26,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:26,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526350976] [2021-06-05 04:57:26,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:26,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:26,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:26,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526350976] [2021-06-05 04:57:26,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526350976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:26,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927409644] [2021-06-05 04:57:26,289 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 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 [2021-06-05 04:57:26,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:26,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:26,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:26,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:26,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:26,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927409644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:26,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:26,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-05 04:57:26,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33905985] [2021-06-05 04:57:26,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:26,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:26,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:26,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:26,597 INFO L87 Difference]: Start difference. First operand 57 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:57:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:26,922 INFO L93 Difference]: Finished difference Result 105 states and 192 transitions. [2021-06-05 04:57:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:57:26,922 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 [2021-06-05 04:57:26,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:26,923 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:57:26,923 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:57:26,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:26,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:57:26,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2021-06-05 04:57:26,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.036363636363636) internal successors, (112), 55 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) [2021-06-05 04:57:26,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 112 transitions. [2021-06-05 04:57:26,925 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 112 transitions. Word has length 14 [2021-06-05 04:57:26,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:26,925 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 112 transitions. [2021-06-05 04:57:26,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:57:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 112 transitions. [2021-06-05 04:57:26,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:26,925 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:26,925 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:27,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable703,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:27,126 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:27,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:27,126 INFO L82 PathProgramCache]: Analyzing trace with hash 610411748, now seen corresponding path program 19 times [2021-06-05 04:57:27,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:27,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821186767] [2021-06-05 04:57:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:27,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:27,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:27,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821186767] [2021-06-05 04:57:27,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821186767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:27,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835386832] [2021-06-05 04:57:27,362 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 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 [2021-06-05 04:57:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:27,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:27,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:27,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835386832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:27,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:27,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 04:57:27,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886271507] [2021-06-05 04:57:27,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:57:27,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:27,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:57:27,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:27,711 INFO L87 Difference]: Start difference. First operand 56 states and 112 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) [2021-06-05 04:57:27,954 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2021-06-05 04:57:28,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:28,090 INFO L93 Difference]: Finished difference Result 91 states and 169 transitions. [2021-06-05 04:57:28,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:28,090 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 [2021-06-05 04:57:28,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:28,091 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:57:28,091 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:57:28,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:57:28,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:57:28,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 55. [2021-06-05 04:57:28,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:28,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-06-05 04:57:28,092 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 14 [2021-06-05 04:57:28,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:28,092 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-06-05 04:57:28,092 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) [2021-06-05 04:57:28,092 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-06-05 04:57:28,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 04:57:28,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:28,093 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:28,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:28,293 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:28,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:28,293 INFO L82 PathProgramCache]: Analyzing trace with hash -2070988814, now seen corresponding path program 20 times [2021-06-05 04:57:28,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:28,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512687172] [2021-06-05 04:57:28,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:28,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:28,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512687172] [2021-06-05 04:57:28,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512687172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030256322] [2021-06-05 04:57:28,536 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 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 [2021-06-05 04:57:28,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:28,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:28,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:57:28,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:28,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:28,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030256322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:28,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:28,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-06-05 04:57:28,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769968590] [2021-06-05 04:57:28,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:28,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:28,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:28,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:28,687 INFO L87 Difference]: Start difference. First operand 55 states and 109 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) [2021-06-05 04:57:29,137 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-06-05 04:57:29,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:29,151 INFO L93 Difference]: Finished difference Result 88 states and 163 transitions. [2021-06-05 04:57:29,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:29,151 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 14 [2021-06-05 04:57:29,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:29,151 INFO L225 Difference]: With dead ends: 88 [2021-06-05 04:57:29,152 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:57:29,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 622.4ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:29,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:57:29,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 57. [2021-06-05 04:57:29,153 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) [2021-06-05 04:57:29,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 112 transitions. [2021-06-05 04:57:29,153 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 112 transitions. Word has length 14 [2021-06-05 04:57:29,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:29,153 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 112 transitions. [2021-06-05 04:57:29,153 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) [2021-06-05 04:57:29,153 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 112 transitions. [2021-06-05 04:57:29,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:29,153 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:29,153 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:29,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-05 04:57:29,354 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:29,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:29,354 INFO L82 PathProgramCache]: Analyzing trace with hash 492372682, now seen corresponding path program 21 times [2021-06-05 04:57:29,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:29,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027688822] [2021-06-05 04:57:29,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:29,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:29,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:29,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027688822] [2021-06-05 04:57:29,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027688822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:29,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020282498] [2021-06-05 04:57:29,409 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 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 [2021-06-05 04:57:29,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:57:29,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:29,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:29,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:29,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020282498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:29,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:29,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:57:29,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709273477] [2021-06-05 04:57:29,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:29,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:29,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:29,535 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) [2021-06-05 04:57:29,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:29,723 INFO L93 Difference]: Finished difference Result 83 states and 154 transitions. [2021-06-05 04:57:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:29,723 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 [2021-06-05 04:57:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:29,724 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:57:29,724 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 04:57:29,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 203.8ms TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:29,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 04:57:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 52. [2021-06-05 04:57:29,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.0) internal successors, (102), 51 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:29,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 102 transitions. [2021-06-05 04:57:29,725 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 102 transitions. Word has length 15 [2021-06-05 04:57:29,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:29,725 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 102 transitions. [2021-06-05 04:57:29,725 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) [2021-06-05 04:57:29,725 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 102 transitions. [2021-06-05 04:57:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:29,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:29,725 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:29,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:29,937 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:29,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:29,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1563887655, now seen corresponding path program 22 times [2021-06-05 04:57:29,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:29,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488636000] [2021-06-05 04:57:29,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:29,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:29,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488636000] [2021-06-05 04:57:29,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488636000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:29,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175828194] [2021-06-05 04:57:29,991 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 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 [2021-06-05 04:57:30,024 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:30,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:30,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:30,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:30,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175828194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:30,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:30,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:57:30,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398432669] [2021-06-05 04:57:30,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:30,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:30,105 INFO L87 Difference]: Start difference. First operand 52 states and 102 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) [2021-06-05 04:57:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:30,249 INFO L93 Difference]: Finished difference Result 80 states and 153 transitions. [2021-06-05 04:57:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:30,250 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 [2021-06-05 04:57:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:30,250 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:57:30,250 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:57:30,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 164.6ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:57:30,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 53. [2021-06-05 04:57:30,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 105 transitions. [2021-06-05 04:57:30,252 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 105 transitions. Word has length 15 [2021-06-05 04:57:30,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:30,252 INFO L482 AbstractCegarLoop]: Abstraction has 53 states and 105 transitions. [2021-06-05 04:57:30,252 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) [2021-06-05 04:57:30,252 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 105 transitions. [2021-06-05 04:57:30,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:30,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:30,252 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:30,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 04:57:30,461 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:30,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:30,461 INFO L82 PathProgramCache]: Analyzing trace with hash -200029942, now seen corresponding path program 23 times [2021-06-05 04:57:30,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:30,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421366079] [2021-06-05 04:57:30,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:30,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:30,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:30,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421366079] [2021-06-05 04:57:30,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421366079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:30,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336669052] [2021-06-05 04:57:30,509 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 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 [2021-06-05 04:57:30,544 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:30,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:30,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:30,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:30,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:30,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336669052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:30,630 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:30,630 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 04:57:30,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568367387] [2021-06-05 04:57:30,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:30,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:30,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:30,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:30,631 INFO L87 Difference]: Start difference. First operand 53 states and 105 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:30,780 INFO L93 Difference]: Finished difference Result 84 states and 157 transitions. [2021-06-05 04:57:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:30,781 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:57:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:30,781 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:57:30,781 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:57:30,781 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:57:30,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:57:30,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2021-06-05 04:57:30,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:30,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 04:57:30,782 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 04:57:30,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:30,783 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 04:57:30,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:30,783 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 04:57:30,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:30,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:30,783 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:30,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-05 04:57:30,989 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash 542091435, now seen corresponding path program 24 times [2021-06-05 04:57:30,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:30,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370852855] [2021-06-05 04:57:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:30,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:31,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:31,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:31,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370852855] [2021-06-05 04:57:31,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370852855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:31,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808517061] [2021-06-05 04:57:31,041 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 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 [2021-06-05 04:57:31,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:31,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:31,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:31,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:31,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:31,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:31,187 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 16 treesize of output 12 [2021-06-05 04:57:31,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:31,191 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 15 treesize of output 11 [2021-06-05 04:57:31,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,212 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 04:57:31,212 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:31,213 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,213 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 04:57:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:31,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808517061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:31,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:31,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:31,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123574656] [2021-06-05 04:57:31,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:31,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:31,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:31,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:31,231 INFO L87 Difference]: Start difference. First operand 54 states and 107 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) [2021-06-05 04:57:31,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:31,340 INFO L93 Difference]: Finished difference Result 75 states and 147 transitions. [2021-06-05 04:57:31,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:31,340 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 [2021-06-05 04:57:31,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:31,340 INFO L225 Difference]: With dead ends: 75 [2021-06-05 04:57:31,340 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 04:57:31,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:31,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 04:57:31,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 54. [2021-06-05 04:57:31,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 107 transitions. [2021-06-05 04:57:31,342 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 107 transitions. Word has length 15 [2021-06-05 04:57:31,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:31,342 INFO L482 AbstractCegarLoop]: Abstraction has 54 states and 107 transitions. [2021-06-05 04:57:31,342 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) [2021-06-05 04:57:31,342 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 107 transitions. [2021-06-05 04:57:31,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:31,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:31,342 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:31,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 04:57:31,543 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash -440476090, now seen corresponding path program 25 times [2021-06-05 04:57:31,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:31,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740078456] [2021-06-05 04:57:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:31,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:31,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740078456] [2021-06-05 04:57:31,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740078456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:31,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807067471] [2021-06-05 04:57:31,585 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:31,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:31,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:31,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:31,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:31,772 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 [2021-06-05 04:57:31,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,778 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 [2021-06-05 04:57:31,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,818 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:57:31,818 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:31,820 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 [2021-06-05 04:57:31,821 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:31,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:31,834 INFO L518 ElimStorePlain]: Eliminatee v_prenex_24 vanished before elimination [2021-06-05 04:57:31,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:31,844 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:31,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807067471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:31,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:31,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:31,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922182672] [2021-06-05 04:57:31,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:31,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:31,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:31,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:31,906 INFO L87 Difference]: Start difference. First operand 54 states and 107 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:32,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:32,481 INFO L93 Difference]: Finished difference Result 105 states and 194 transitions. [2021-06-05 04:57:32,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 04:57:32,481 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:32,481 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:57:32,481 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:57:32,482 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 569.3ms TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:57:32,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:57:32,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 59. [2021-06-05 04:57:32,483 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) [2021-06-05 04:57:32,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 04:57:32,483 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 04:57:32,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:32,483 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 04:57:32,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:32,483 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 04:57:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:32,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:32,483 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:32,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable798,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:32,693 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:32,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:32,693 INFO L82 PathProgramCache]: Analyzing trace with hash -693631355, now seen corresponding path program 26 times [2021-06-05 04:57:32,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:32,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915143864] [2021-06-05 04:57:32,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:32,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:32,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:32,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915143864] [2021-06-05 04:57:32,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915143864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:32,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546069180] [2021-06-05 04:57:32,743 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 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 [2021-06-05 04:57:32,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:32,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:32,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:32,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:57:32,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:32,880 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 15 treesize of output 11 [2021-06-05 04:57:32,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:32,905 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:57:32,905 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:32,906 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:32,906 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:57:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:32,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546069180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:32,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:32,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:32,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337183374] [2021-06-05 04:57:32,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:32,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:32,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:32,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:32,941 INFO L87 Difference]: Start difference. First operand 59 states and 119 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) [2021-06-05 04:57:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:33,160 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-06-05 04:57:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:33,160 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 [2021-06-05 04:57:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:33,161 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:57:33,161 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:57:33,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 245.4ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:33,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:57:33,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 59. [2021-06-05 04:57:33,162 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) [2021-06-05 04:57:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 119 transitions. [2021-06-05 04:57:33,162 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 119 transitions. Word has length 15 [2021-06-05 04:57:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:33,162 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 119 transitions. [2021-06-05 04:57:33,162 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) [2021-06-05 04:57:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 119 transitions. [2021-06-05 04:57:33,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:33,163 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:33,163 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:33,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable817,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:33,369 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:33,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1140969078, now seen corresponding path program 27 times [2021-06-05 04:57:33,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:33,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284389036] [2021-06-05 04:57:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:33,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:33,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284389036] [2021-06-05 04:57:33,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284389036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:33,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758301772] [2021-06-05 04:57:33,419 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 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 [2021-06-05 04:57:33,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:33,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:33,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:33,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:33,593 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 15 treesize of output 11 [2021-06-05 04:57:33,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:33,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:33,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:33,630 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 04:57:33,631 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:33,633 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 [2021-06-05 04:57:33,634 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:33,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:33,648 INFO L518 ElimStorePlain]: Eliminatee v_prenex_28 vanished before elimination [2021-06-05 04:57:33,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:33,649 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:33,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758301772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:33,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:33,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:33,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94424305] [2021-06-05 04:57:33,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:33,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:33,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:33,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:33,699 INFO L87 Difference]: Start difference. First operand 59 states and 119 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) [2021-06-05 04:57:33,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:33,948 INFO L93 Difference]: Finished difference Result 90 states and 173 transitions. [2021-06-05 04:57:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:33,948 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 15 [2021-06-05 04:57:33,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:33,949 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:57:33,949 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:57:33,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 265.3ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:57:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 55. [2021-06-05 04:57:33,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:33,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 110 transitions. [2021-06-05 04:57:33,950 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 110 transitions. Word has length 15 [2021-06-05 04:57:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:33,950 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 110 transitions. [2021-06-05 04:57:33,950 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) [2021-06-05 04:57:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 110 transitions. [2021-06-05 04:57:33,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:33,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:33,951 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:34,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:34,163 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1171200973, now seen corresponding path program 28 times [2021-06-05 04:57:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:34,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66531439] [2021-06-05 04:57:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:34,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:34,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66531439] [2021-06-05 04:57:34,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66531439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:34,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307248224] [2021-06-05 04:57:34,207 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:34,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:34,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:34,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:34,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:34,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:34,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:34,338 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 15 treesize of output 11 [2021-06-05 04:57:34,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:34,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:34,342 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 [2021-06-05 04:57:34,343 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:34,368 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:57:34,368 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:34,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:34,369 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:57:34,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:34,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307248224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:34,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:34,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:34,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774414811] [2021-06-05 04:57:34,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:34,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:34,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:34,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:34,424 INFO L87 Difference]: Start difference. First operand 55 states and 110 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) [2021-06-05 04:57:34,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:34,660 INFO L93 Difference]: Finished difference Result 72 states and 140 transitions. [2021-06-05 04:57:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:34,660 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 15 [2021-06-05 04:57:34,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:34,661 INFO L225 Difference]: With dead ends: 72 [2021-06-05 04:57:34,661 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 04:57:34,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 287.4ms TimeCoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:57:34,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 04:57:34,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 55. [2021-06-05 04:57:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 109 transitions. [2021-06-05 04:57:34,662 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 109 transitions. Word has length 15 [2021-06-05 04:57:34,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:34,662 INFO L482 AbstractCegarLoop]: Abstraction has 55 states and 109 transitions. [2021-06-05 04:57:34,662 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) [2021-06-05 04:57:34,662 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 109 transitions. [2021-06-05 04:57:34,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:34,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:34,662 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:34,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 04:57:34,873 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:34,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1353215032, now seen corresponding path program 29 times [2021-06-05 04:57:34,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:34,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091923534] [2021-06-05 04:57:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:34,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091923534] [2021-06-05 04:57:34,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091923534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:34,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889678222] [2021-06-05 04:57:34,921 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 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 [2021-06-05 04:57:34,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:34,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:34,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:34,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:35,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889678222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:35,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:35,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 04:57:35,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630988601] [2021-06-05 04:57:35,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:35,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:35,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:35,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:35,020 INFO L87 Difference]: Start difference. First operand 55 states and 109 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:35,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:35,176 INFO L93 Difference]: Finished difference Result 69 states and 133 transitions. [2021-06-05 04:57:35,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:35,176 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:57:35,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:35,176 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:57:35,176 INFO L226 Difference]: Without dead ends: 63 [2021-06-05 04:57:35,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:57:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-06-05 04:57:35,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 57. [2021-06-05 04:57:35,178 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) [2021-06-05 04:57:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 04:57:35,178 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 04:57:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:35,178 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 04:57:35,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:35,178 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 04:57:35,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:35,178 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:35,178 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:35,378 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable857 [2021-06-05 04:57:35,379 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:35,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:35,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2095336409, now seen corresponding path program 30 times [2021-06-05 04:57:35,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:35,379 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683602849] [2021-06-05 04:57:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:35,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:35,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683602849] [2021-06-05 04:57:35,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683602849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:35,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127539276] [2021-06-05 04:57:35,430 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 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 [2021-06-05 04:57:35,453 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:35,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:35,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:35,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:35,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,551 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 15 treesize of output 11 [2021-06-05 04:57:35,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:35,555 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 [2021-06-05 04:57:35,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,575 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 04:57:35,576 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:35,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:57:35,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 04:57:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:35,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127539276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:35,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:35,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:35,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736484113] [2021-06-05 04:57:35,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:35,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:35,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:35,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:35,594 INFO L87 Difference]: Start difference. First operand 57 states and 113 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:35,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:35,710 INFO L93 Difference]: Finished difference Result 68 states and 135 transitions. [2021-06-05 04:57:35,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:35,711 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:35,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:35,711 INFO L225 Difference]: With dead ends: 68 [2021-06-05 04:57:35,711 INFO L226 Difference]: Without dead ends: 68 [2021-06-05 04:57:35,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-05 04:57:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2021-06-05 04:57:35,712 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) [2021-06-05 04:57:35,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 04:57:35,713 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 04:57:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:35,713 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 04:57:35,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 04:57:35,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:35,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:35,713 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:35,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable862 [2021-06-05 04:57:35,913 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:35,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:35,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1112768884, now seen corresponding path program 31 times [2021-06-05 04:57:35,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:35,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424432988] [2021-06-05 04:57:35,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:35,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:35,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424432988] [2021-06-05 04:57:35,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424432988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867557384] [2021-06-05 04:57:35,960 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 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 [2021-06-05 04:57:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:36,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:36,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:36,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,105 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,106 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 16 treesize of output 12 [2021-06-05 04:57:36,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,109 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 [2021-06-05 04:57:36,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,148 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:57:36,148 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:36,150 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 [2021-06-05 04:57:36,151 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:36,164 INFO L518 ElimStorePlain]: Eliminatee v_prenex_30 vanished before elimination [2021-06-05 04:57:36,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:36,165 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:36,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867557384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:36,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:36,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:36,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535706131] [2021-06-05 04:57:36,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:36,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:36,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:36,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:36,220 INFO L87 Difference]: Start difference. First operand 57 states and 113 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) [2021-06-05 04:57:36,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:36,524 INFO L93 Difference]: Finished difference Result 87 states and 164 transitions. [2021-06-05 04:57:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:57:36,524 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 15 [2021-06-05 04:57:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:36,525 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:57:36,525 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:57:36,525 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:36,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:57:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2021-06-05 04:57:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 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) [2021-06-05 04:57:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-06-05 04:57:36,526 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-06-05 04:57:36,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:36,526 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-06-05 04:57:36,526 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) [2021-06-05 04:57:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-06-05 04:57:36,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:36,526 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:36,526 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:36,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-05 04:57:36,727 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:36,727 INFO L82 PathProgramCache]: Analyzing trace with hash 859613619, now seen corresponding path program 32 times [2021-06-05 04:57:36,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:36,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391421462] [2021-06-05 04:57:36,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:36,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:36,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391421462] [2021-06-05 04:57:36,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391421462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:36,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926553132] [2021-06-05 04:57:36,778 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 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 [2021-06-05 04:57:36,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:36,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:36,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:36,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,949 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 15 treesize of output 11 [2021-06-05 04:57:36,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:36,952 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 [2021-06-05 04:57:36,953 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:36,977 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:57:36,978 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:36,978 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:36,979 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:57:37,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:37,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926553132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:37,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:37,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:37,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121487170] [2021-06-05 04:57:37,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:37,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:37,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:37,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:37,014 INFO L87 Difference]: Start difference. First operand 62 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:37,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:37,180 INFO L93 Difference]: Finished difference Result 94 states and 181 transitions. [2021-06-05 04:57:37,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:37,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:37,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:37,180 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:57:37,180 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:57:37,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 203.4ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:37,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:57:37,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 62. [2021-06-05 04:57:37,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0491803278688523) internal successors, (125), 61 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) [2021-06-05 04:57:37,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 125 transitions. [2021-06-05 04:57:37,182 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 125 transitions. Word has length 15 [2021-06-05 04:57:37,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:37,182 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 125 transitions. [2021-06-05 04:57:37,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:37,182 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 125 transitions. [2021-06-05 04:57:37,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:37,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:37,182 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:37,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable885,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:37,389 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:37,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:37,390 INFO L82 PathProgramCache]: Analyzing trace with hash 412275896, now seen corresponding path program 33 times [2021-06-05 04:57:37,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:37,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951854198] [2021-06-05 04:57:37,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:37,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:37,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:37,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:37,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951854198] [2021-06-05 04:57:37,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951854198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:37,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142892004] [2021-06-05 04:57:37,442 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 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 [2021-06-05 04:57:37,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:37,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:37,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:37,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:37,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:37,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:37,577 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 15 treesize of output 11 [2021-06-05 04:57:37,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,581 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:37,581 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,619 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 04:57:37,619 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:37,621 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 [2021-06-05 04:57:37,623 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:37,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:37,638 INFO L518 ElimStorePlain]: Eliminatee v_prenex_33 vanished before elimination [2021-06-05 04:57:37,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:37,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:37,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142892004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:37,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:37,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:37,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913019532] [2021-06-05 04:57:37,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:37,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:37,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:37,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:37,688 INFO L87 Difference]: Start difference. First operand 62 states and 125 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) [2021-06-05 04:57:37,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:37,826 INFO L93 Difference]: Finished difference Result 72 states and 143 transitions. [2021-06-05 04:57:37,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:57:37,826 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 [2021-06-05 04:57:37,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:37,826 INFO L225 Difference]: With dead ends: 72 [2021-06-05 04:57:37,826 INFO L226 Difference]: Without dead ends: 72 [2021-06-05 04:57:37,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:37,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-06-05 04:57:37,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2021-06-05 04:57:37,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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) [2021-06-05 04:57:37,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 04:57:37,828 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 04:57:37,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:37,828 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 04:57:37,828 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) [2021-06-05 04:57:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 04:57:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:37,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:37,828 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:38,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-05 04:57:38,045 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:38,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:38,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1570521349, now seen corresponding path program 34 times [2021-06-05 04:57:38,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:38,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678371358] [2021-06-05 04:57:38,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:38,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:38,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:38,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678371358] [2021-06-05 04:57:38,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678371358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:38,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353525346] [2021-06-05 04:57:38,105 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 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 [2021-06-05 04:57:38,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:38,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:38,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:38,235 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:38,236 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 15 treesize of output 11 [2021-06-05 04:57:38,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:38,261 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-06-05 04:57:38,262 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:38,262 INFO L518 ElimStorePlain]: Eliminatee v_prenex_36 vanished before elimination [2021-06-05 04:57:38,262 INFO L518 ElimStorePlain]: Eliminatee v_prenex_37 vanished before elimination [2021-06-05 04:57:38,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:38,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-06-05 04:57:38,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:38,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353525346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:38,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:38,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:38,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223996913] [2021-06-05 04:57:38,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:38,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:38,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:38,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:38,317 INFO L87 Difference]: Start difference. First operand 58 states and 116 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) [2021-06-05 04:57:38,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:38,435 INFO L93 Difference]: Finished difference Result 71 states and 139 transitions. [2021-06-05 04:57:38,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:38,435 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 [2021-06-05 04:57:38,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:38,435 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:57:38,435 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:57:38,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 170.1ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:57:38,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 56. [2021-06-05 04:57:38,436 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) [2021-06-05 04:57:38,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 04:57:38,437 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 04:57:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:38,437 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 04:57:38,437 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) [2021-06-05 04:57:38,437 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 04:57:38,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:38,437 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:38,437 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:38,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable906,38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:38,645 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:38,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:38,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1700514206, now seen corresponding path program 35 times [2021-06-05 04:57:38,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:38,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998184123] [2021-06-05 04:57:38,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:38,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:38,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:38,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998184123] [2021-06-05 04:57:38,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998184123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:38,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150105926] [2021-06-05 04:57:38,700 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 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 [2021-06-05 04:57:38,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:38,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:38,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:38,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:38,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:38,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150105926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:38,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:38,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 04:57:38,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739564728] [2021-06-05 04:57:38,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:57:38,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:38,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:57:38,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:38,808 INFO L87 Difference]: Start difference. First operand 56 states and 111 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:39,002 INFO L93 Difference]: Finished difference Result 86 states and 162 transitions. [2021-06-05 04:57:39,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:39,003 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:57:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:39,003 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:57:39,003 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:57:39,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:39,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:57:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 63. [2021-06-05 04:57:39,004 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) [2021-06-05 04:57:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 04:57:39,004 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 04:57:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:39,004 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 04:57:39,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:57:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 04:57:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:39,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:39,005 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:39,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable923,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:39,213 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:39,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1447358941, now seen corresponding path program 36 times [2021-06-05 04:57:39,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:39,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393366943] [2021-06-05 04:57:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:39,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:39,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393366943] [2021-06-05 04:57:39,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393366943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:39,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113698849] [2021-06-05 04:57:39,254 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 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 [2021-06-05 04:57:39,295 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:57:39,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:39,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:39,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:39,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:39,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:39,379 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 15 treesize of output 11 [2021-06-05 04:57:39,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:39,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:39,382 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 16 treesize of output 12 [2021-06-05 04:57:39,382 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:39,410 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:57:39,410 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:39,411 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:39,411 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:57:39,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:39,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113698849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:39,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:39,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:39,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971733476] [2021-06-05 04:57:39,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:39,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:39,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:39,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:39,446 INFO L87 Difference]: Start difference. First operand 63 states and 129 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:39,537 INFO L93 Difference]: Finished difference Result 90 states and 174 transitions. [2021-06-05 04:57:39,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:39,538 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:39,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:39,538 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:57:39,538 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:57:39,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 114.1ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:57:39,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2021-06-05 04:57:39,539 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) [2021-06-05 04:57:39,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 04:57:39,540 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 04:57:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:39,540 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 04:57:39,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 04:57:39,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:39,540 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:39,540 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:39,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:39,753 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:39,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:39,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1000021218, now seen corresponding path program 37 times [2021-06-05 04:57:39,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:39,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101906751] [2021-06-05 04:57:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:39,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:39,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101906751] [2021-06-05 04:57:39,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101906751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:39,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158365675] [2021-06-05 04:57:39,804 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 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 [2021-06-05 04:57:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:39,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:39,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:39,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:39,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:39,896 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 15 treesize of output 11 [2021-06-05 04:57:39,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:39,899 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:39,900 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:39,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:39,903 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 16 treesize of output 12 [2021-06-05 04:57:39,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:39,905 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 [2021-06-05 04:57:39,906 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:39,937 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 04:57:39,937 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:39,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:39,938 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:57:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:39,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158365675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:39,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:39,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:39,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507591600] [2021-06-05 04:57:39,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:39,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:39,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:39,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:39,971 INFO L87 Difference]: Start difference. First operand 63 states and 129 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) [2021-06-05 04:57:40,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:40,059 INFO L93 Difference]: Finished difference Result 86 states and 165 transitions. [2021-06-05 04:57:40,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:40,060 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 [2021-06-05 04:57:40,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:40,060 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:57:40,060 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:57:40,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:57:40,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 63. [2021-06-05 04:57:40,061 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) [2021-06-05 04:57:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 129 transitions. [2021-06-05 04:57:40,062 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 129 transitions. Word has length 15 [2021-06-05 04:57:40,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:40,062 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 129 transitions. [2021-06-05 04:57:40,062 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) [2021-06-05 04:57:40,062 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 129 transitions. [2021-06-05 04:57:40,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:40,062 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:40,062 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:40,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable943,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:40,262 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:40,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:40,263 INFO L82 PathProgramCache]: Analyzing trace with hash -982776027, now seen corresponding path program 38 times [2021-06-05 04:57:40,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:40,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442896702] [2021-06-05 04:57:40,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:40,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:40,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:40,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:40,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442896702] [2021-06-05 04:57:40,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442896702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:40,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508127363] [2021-06-05 04:57:40,311 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 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 [2021-06-05 04:57:40,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:40,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:40,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:40,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:40,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:40,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:40,413 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 15 treesize of output 11 [2021-06-05 04:57:40,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:40,416 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 16 treesize of output 12 [2021-06-05 04:57:40,417 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:40,444 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:57:40,445 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:40,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:40,445 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:57:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:40,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508127363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:40,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:40,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:40,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196182474] [2021-06-05 04:57:40,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:40,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:40,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:40,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:40,504 INFO L87 Difference]: Start difference. First operand 63 states and 129 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) [2021-06-05 04:57:40,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:40,684 INFO L93 Difference]: Finished difference Result 92 states and 175 transitions. [2021-06-05 04:57:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:40,685 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 [2021-06-05 04:57:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:40,685 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:57:40,685 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:57:40,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 203.2ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:40,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:57:40,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 62. [2021-06-05 04:57:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.0655737704918034) internal successors, (126), 61 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) [2021-06-05 04:57:40,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 126 transitions. [2021-06-05 04:57:40,687 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 126 transitions. Word has length 15 [2021-06-05 04:57:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:40,687 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 126 transitions. [2021-06-05 04:57:40,687 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) [2021-06-05 04:57:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 126 transitions. [2021-06-05 04:57:40,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:40,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:40,687 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:40,887 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable952 [2021-06-05 04:57:40,887 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:40,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:40,888 INFO L82 PathProgramCache]: Analyzing trace with hash 464791416, now seen corresponding path program 39 times [2021-06-05 04:57:40,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:40,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613297046] [2021-06-05 04:57:40,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:40,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:40,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:40,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613297046] [2021-06-05 04:57:40,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613297046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:40,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926587434] [2021-06-05 04:57:40,942 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 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 [2021-06-05 04:57:40,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:40,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:40,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:41,024 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:41,025 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:41,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:57:41,026 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:41,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:41,028 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 15 treesize of output 11 [2021-06-05 04:57:41,029 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:41,050 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 04:57:41,050 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:41,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:57:41,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 04:57:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:41,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926587434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:41,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:41,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:41,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051907559] [2021-06-05 04:57:41,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:41,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:41,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:41,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:41,069 INFO L87 Difference]: Start difference. First operand 62 states and 126 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) [2021-06-05 04:57:41,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:41,150 INFO L93 Difference]: Finished difference Result 71 states and 141 transitions. [2021-06-05 04:57:41,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:41,150 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 [2021-06-05 04:57:41,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:41,150 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:57:41,151 INFO L226 Difference]: Without dead ends: 71 [2021-06-05 04:57:41,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:41,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-06-05 04:57:41,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2021-06-05 04:57:41,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0526315789473686) internal successors, (117), 57 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 117 transitions. [2021-06-05 04:57:41,152 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 117 transitions. Word has length 15 [2021-06-05 04:57:41,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:41,152 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 117 transitions. [2021-06-05 04:57:41,152 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) [2021-06-05 04:57:41,152 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 117 transitions. [2021-06-05 04:57:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:41,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:41,152 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:41,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable965,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:41,353 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash 92935129, now seen corresponding path program 40 times [2021-06-05 04:57:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:41,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629726828] [2021-06-05 04:57:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:41,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:41,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629726828] [2021-06-05 04:57:41,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629726828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:41,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120769322] [2021-06-05 04:57:41,400 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:41,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:41,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:41,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:41,514 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:41,514 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 16 treesize of output 12 [2021-06-05 04:57:41,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:41,517 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 [2021-06-05 04:57:41,518 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:41,520 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 [2021-06-05 04:57:41,521 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:41,553 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 04:57:41,554 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:41,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:41,555 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 04:57:41,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:41,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120769322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:41,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:41,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:41,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18816790] [2021-06-05 04:57:41,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:41,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:41,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:41,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:41,578 INFO L87 Difference]: Start difference. First operand 58 states and 117 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) [2021-06-05 04:57:41,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:41,642 INFO L93 Difference]: Finished difference Result 66 states and 129 transitions. [2021-06-05 04:57:41,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:57:41,642 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 [2021-06-05 04:57:41,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:41,643 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:57:41,643 INFO L226 Difference]: Without dead ends: 62 [2021-06-05 04:57:41,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:57:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-06-05 04:57:41,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2021-06-05 04:57:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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) [2021-06-05 04:57:41,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 04:57:41,644 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 04:57:41,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:41,644 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 04:57:41,644 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) [2021-06-05 04:57:41,644 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 04:57:41,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:41,644 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:41,644 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:41,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:41,854 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:41,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:41,854 INFO L82 PathProgramCache]: Analyzing trace with hash 355244938, now seen corresponding path program 41 times [2021-06-05 04:57:41,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:41,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444265113] [2021-06-05 04:57:41,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:41,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:41,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444265113] [2021-06-05 04:57:41,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444265113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:41,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083736852] [2021-06-05 04:57:41,913 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 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 [2021-06-05 04:57:41,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:42,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,032 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 [2021-06-05 04:57:42,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,035 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 [2021-06-05 04:57:42,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,038 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 [2021-06-05 04:57:42,039 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,076 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 04:57:42,076 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:42,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:42,077 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 04:57:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:42,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083736852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:42,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:42,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:42,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943085012] [2021-06-05 04:57:42,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:42,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:42,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:42,104 INFO L87 Difference]: Start difference. First operand 58 states and 116 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) [2021-06-05 04:57:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:42,199 INFO L93 Difference]: Finished difference Result 71 states and 137 transitions. [2021-06-05 04:57:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:42,200 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 15 [2021-06-05 04:57:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:42,200 INFO L225 Difference]: With dead ends: 71 [2021-06-05 04:57:42,200 INFO L226 Difference]: Without dead ends: 65 [2021-06-05 04:57:42,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:42,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-06-05 04:57:42,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 58. [2021-06-05 04:57:42,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 04:57:42,201 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 04:57:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:42,202 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 04:57:42,202 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) [2021-06-05 04:57:42,202 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 04:57:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:42,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:42,202 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:42,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-05 04:57:42,409 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:42,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:42,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1097366315, now seen corresponding path program 42 times [2021-06-05 04:57:42,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:42,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715277859] [2021-06-05 04:57:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:42,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:42,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715277859] [2021-06-05 04:57:42,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715277859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:42,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587473077] [2021-06-05 04:57:42,461 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 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 [2021-06-05 04:57:42,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:42,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:42,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:42,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,565 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 16 treesize of output 12 [2021-06-05 04:57:42,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:42,568 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 15 treesize of output 11 [2021-06-05 04:57:42,569 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,593 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 04:57:42,593 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:42,594 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:57:42,594 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 04:57:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:42,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587473077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:42,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:42,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:42,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479719181] [2021-06-05 04:57:42,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:42,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:42,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:42,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:42,610 INFO L87 Difference]: Start difference. First operand 58 states and 115 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:42,680 INFO L93 Difference]: Finished difference Result 66 states and 131 transitions. [2021-06-05 04:57:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:42,681 INFO L225 Difference]: With dead ends: 66 [2021-06-05 04:57:42,681 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 04:57:42,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 110.8ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:42,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 04:57:42,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2021-06-05 04:57:42,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:42,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 115 transitions. [2021-06-05 04:57:42,682 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 115 transitions. Word has length 15 [2021-06-05 04:57:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:42,683 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 115 transitions. [2021-06-05 04:57:42,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:42,683 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 115 transitions. [2021-06-05 04:57:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:42,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:42,683 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:42,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 04:57:42,891 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:42,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash 114798790, now seen corresponding path program 43 times [2021-06-05 04:57:42,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:42,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047484480] [2021-06-05 04:57:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:42,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:42,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047484480] [2021-06-05 04:57:42,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047484480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:42,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691717644] [2021-06-05 04:57:42,939 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 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 [2021-06-05 04:57:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:42,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:42,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:43,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,047 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 15 treesize of output 11 [2021-06-05 04:57:43,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,050 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 16 treesize of output 12 [2021-06-05 04:57:43,051 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,079 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:57:43,079 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:43,080 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:43,080 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:57:43,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:43,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691717644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:43,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:43,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:43,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045872407] [2021-06-05 04:57:43,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:43,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:43,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:43,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:43,121 INFO L87 Difference]: Start difference. First operand 58 states and 115 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) [2021-06-05 04:57:43,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:43,338 INFO L93 Difference]: Finished difference Result 85 states and 160 transitions. [2021-06-05 04:57:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:57:43,339 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 15 [2021-06-05 04:57:43,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:43,339 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:57:43,339 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:57:43,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:43,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:57:43,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-06-05 04:57:43,340 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) [2021-06-05 04:57:43,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 04:57:43,341 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 04:57:43,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:43,341 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 04:57:43,341 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) [2021-06-05 04:57:43,341 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 04:57:43,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:43,341 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:43,341 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:43,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-05 04:57:43,557 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:43,557 INFO L82 PathProgramCache]: Analyzing trace with hash -138356475, now seen corresponding path program 44 times [2021-06-05 04:57:43,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:43,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779039783] [2021-06-05 04:57:43,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:43,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:43,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779039783] [2021-06-05 04:57:43,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779039783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:43,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931641439] [2021-06-05 04:57:43,609 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 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 [2021-06-05 04:57:43,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:43,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:43,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:43,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:43,707 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 [2021-06-05 04:57:43,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,710 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 [2021-06-05 04:57:43,711 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,714 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 15 treesize of output 11 [2021-06-05 04:57:43,715 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:43,717 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 16 treesize of output 12 [2021-06-05 04:57:43,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:43,755 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:57:43,755 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:43,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:43,756 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:57:43,790 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:43,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931641439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:43,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:43,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:43,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708491748] [2021-06-05 04:57:43,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:43,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:43,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:43,792 INFO L87 Difference]: Start difference. First operand 63 states and 127 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:43,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:43,907 INFO L93 Difference]: Finished difference Result 92 states and 177 transitions. [2021-06-05 04:57:43,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:43,907 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:43,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:43,907 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:57:43,907 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:57:43,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:57:43,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 63. [2021-06-05 04:57:43,909 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) [2021-06-05 04:57:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 127 transitions. [2021-06-05 04:57:43,909 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 127 transitions. Word has length 15 [2021-06-05 04:57:43,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:43,909 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 127 transitions. [2021-06-05 04:57:43,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 127 transitions. [2021-06-05 04:57:43,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:43,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:43,910 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:44,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1016,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:44,126 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:44,126 INFO L82 PathProgramCache]: Analyzing trace with hash -585694198, now seen corresponding path program 45 times [2021-06-05 04:57:44,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:44,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014255674] [2021-06-05 04:57:44,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:44,175 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:44,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:44,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014255674] [2021-06-05 04:57:44,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014255674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:44,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312436642] [2021-06-05 04:57:44,176 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 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 [2021-06-05 04:57:44,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:44,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:44,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:44,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:44,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:44,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:44,284 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 15 treesize of output 11 [2021-06-05 04:57:44,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:44,287 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 16 treesize of output 12 [2021-06-05 04:57:44,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,316 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:57:44,316 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:44,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:44,317 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:57:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:44,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312436642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:44,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:44,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:44,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153843297] [2021-06-05 04:57:44,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:44,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:44,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:44,349 INFO L87 Difference]: Start difference. First operand 63 states and 127 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) [2021-06-05 04:57:44,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:44,441 INFO L93 Difference]: Finished difference Result 70 states and 139 transitions. [2021-06-05 04:57:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:44,442 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 [2021-06-05 04:57:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:44,442 INFO L225 Difference]: With dead ends: 70 [2021-06-05 04:57:44,442 INFO L226 Difference]: Without dead ends: 70 [2021-06-05 04:57:44,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:44,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-06-05 04:57:44,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 59. [2021-06-05 04:57:44,443 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) [2021-06-05 04:57:44,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 118 transitions. [2021-06-05 04:57:44,443 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 118 transitions. Word has length 15 [2021-06-05 04:57:44,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:44,444 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 118 transitions. [2021-06-05 04:57:44,444 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) [2021-06-05 04:57:44,444 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 118 transitions. [2021-06-05 04:57:44,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:44,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:44,444 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:44,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 04:57:44,645 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:44,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:44,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1726475853, now seen corresponding path program 46 times [2021-06-05 04:57:44,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:44,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112692721] [2021-06-05 04:57:44,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:44,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112692721] [2021-06-05 04:57:44,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112692721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:44,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179680246] [2021-06-05 04:57:44,701 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 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 [2021-06-05 04:57:44,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:44,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:44,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:44,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:44,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:44,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:44,782 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 16 treesize of output 12 [2021-06-05 04:57:44,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,785 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 [2021-06-05 04:57:44,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:44,788 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:44,788 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 15 treesize of output 11 [2021-06-05 04:57:44,789 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,791 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 [2021-06-05 04:57:44,792 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:44,825 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:57:44,825 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:44,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:44,826 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:57:44,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:44,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179680246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:44,879 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:44,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:44,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649517528] [2021-06-05 04:57:44,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:44,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:44,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:44,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:44,880 INFO L87 Difference]: Start difference. First operand 59 states and 118 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) [2021-06-05 04:57:44,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:44,995 INFO L93 Difference]: Finished difference Result 69 states and 135 transitions. [2021-06-05 04:57:44,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:44,995 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 [2021-06-05 04:57:44,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:44,996 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:57:44,996 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 04:57:44,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 167.3ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:44,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 04:57:44,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 57. [2021-06-05 04:57:44,997 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) [2021-06-05 04:57:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 113 transitions. [2021-06-05 04:57:44,997 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 113 transitions. Word has length 15 [2021-06-05 04:57:44,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:44,997 INFO L482 AbstractCegarLoop]: Abstraction has 57 states and 113 transitions. [2021-06-05 04:57:44,997 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) [2021-06-05 04:57:44,997 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 113 transitions. [2021-06-05 04:57:44,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:44,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:44,997 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:45,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:45,213 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:45,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:45,213 INFO L82 PathProgramCache]: Analyzing trace with hash 702544112, now seen corresponding path program 47 times [2021-06-05 04:57:45,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:45,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943151101] [2021-06-05 04:57:45,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:45,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:45,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:45,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943151101] [2021-06-05 04:57:45,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943151101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:45,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534250946] [2021-06-05 04:57:45,266 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 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 [2021-06-05 04:57:45,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:45,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:45,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:45,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:45,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,388 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 16 treesize of output 12 [2021-06-05 04:57:45,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,391 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:45,391 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 15 treesize of output 11 [2021-06-05 04:57:45,392 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:45,419 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:57:45,419 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:45,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:45,420 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:57:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:45,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534250946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:45,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:45,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:45,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045202407] [2021-06-05 04:57:45,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:45,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:45,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:45,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:45,468 INFO L87 Difference]: Start difference. First operand 57 states and 113 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) [2021-06-05 04:57:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:45,665 INFO L93 Difference]: Finished difference Result 84 states and 158 transitions. [2021-06-05 04:57:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:45,665 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 15 [2021-06-05 04:57:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:45,665 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:57:45,666 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:57:45,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 229.7ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:45,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:57:45,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-06-05 04:57:45,667 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) [2021-06-05 04:57:45,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 04:57:45,667 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 04:57:45,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:45,667 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 04:57:45,667 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) [2021-06-05 04:57:45,667 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 04:57:45,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:45,667 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:45,667 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:45,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:45,881 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash 449388847, now seen corresponding path program 48 times [2021-06-05 04:57:45,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:45,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634707553] [2021-06-05 04:57:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:45,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:45,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:45,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634707553] [2021-06-05 04:57:45,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634707553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:45,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63684482] [2021-06-05 04:57:45,938 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 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 [2021-06-05 04:57:45,962 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:57:45,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:45,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:45,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:46,061 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 [2021-06-05 04:57:46,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:46,065 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 [2021-06-05 04:57:46,065 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,103 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:57:46,103 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:46,106 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 [2021-06-05 04:57:46,106 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:46,120 INFO L518 ElimStorePlain]: Eliminatee v_prenex_40 vanished before elimination [2021-06-05 04:57:46,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:46,121 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:46,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63684482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:46,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:46,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:46,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535619177] [2021-06-05 04:57:46,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:46,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:46,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:46,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:46,170 INFO L87 Difference]: Start difference. First operand 64 states and 131 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:46,301 INFO L93 Difference]: Finished difference Result 88 states and 170 transitions. [2021-06-05 04:57:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:57:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:46,301 INFO L225 Difference]: With dead ends: 88 [2021-06-05 04:57:46,301 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:57:46,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:57:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 64. [2021-06-05 04:57:46,303 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) [2021-06-05 04:57:46,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 04:57:46,303 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 04:57:46,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:46,303 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 04:57:46,303 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:46,303 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 04:57:46,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:46,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:46,304 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:46,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:46,521 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:46,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:46,521 INFO L82 PathProgramCache]: Analyzing trace with hash 2051124, now seen corresponding path program 49 times [2021-06-05 04:57:46,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:46,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892058569] [2021-06-05 04:57:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:46,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:46,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892058569] [2021-06-05 04:57:46,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892058569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:46,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654717911] [2021-06-05 04:57:46,568 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:57:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:46,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:46,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:46,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:46,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:46,683 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 16 treesize of output 12 [2021-06-05 04:57:46,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:46,686 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 15 treesize of output 11 [2021-06-05 04:57:46,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:46,712 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:57:46,713 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:46,713 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:46,713 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:57:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:46,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654717911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:46,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:46,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:46,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607257539] [2021-06-05 04:57:46,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:46,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:46,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:46,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:46,746 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) [2021-06-05 04:57:46,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:46,907 INFO L93 Difference]: Finished difference Result 84 states and 161 transitions. [2021-06-05 04:57:46,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 04:57:46,907 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 [2021-06-05 04:57:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:46,908 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:57:46,908 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:57:46,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:57:46,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 64. [2021-06-05 04:57:46,909 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) [2021-06-05 04:57:46,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 131 transitions. [2021-06-05 04:57:46,909 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 131 transitions. Word has length 15 [2021-06-05 04:57:46,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:46,909 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 131 transitions. [2021-06-05 04:57:46,909 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) [2021-06-05 04:57:46,909 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 131 transitions. [2021-06-05 04:57:46,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:46,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:46,909 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:47,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:47,110 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:47,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:47,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1980746121, now seen corresponding path program 50 times [2021-06-05 04:57:47,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:47,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628862047] [2021-06-05 04:57:47,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:47,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628862047] [2021-06-05 04:57:47,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628862047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:47,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659354324] [2021-06-05 04:57:47,190 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 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 [2021-06-05 04:57:47,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:47,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:47,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:47,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:47,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:47,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:47,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:57:47,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:47,331 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 [2021-06-05 04:57:47,332 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:47,370 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:57:47,371 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:47,373 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 [2021-06-05 04:57:47,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:47,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:47,387 INFO L518 ElimStorePlain]: Eliminatee v_prenex_42 vanished before elimination [2021-06-05 04:57:47,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:47,388 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:47,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:47,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659354324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:47,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:47,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:47,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444111256] [2021-06-05 04:57:47,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:47,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:47,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:47,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:47,461 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) [2021-06-05 04:57:47,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:47,682 INFO L93 Difference]: Finished difference Result 90 states and 171 transitions. [2021-06-05 04:57:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:57:47,685 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 [2021-06-05 04:57:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:47,685 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:57:47,685 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:57:47,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:57:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:57:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2021-06-05 04:57:47,686 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) [2021-06-05 04:57:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 128 transitions. [2021-06-05 04:57:47,686 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 128 transitions. Word has length 15 [2021-06-05 04:57:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:47,686 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 128 transitions. [2021-06-05 04:57:47,686 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) [2021-06-05 04:57:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 128 transitions. [2021-06-05 04:57:47,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:47,687 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:47,687 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:47,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1090 [2021-06-05 04:57:47,903 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:47,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:47,903 INFO L82 PathProgramCache]: Analyzing trace with hash -533178678, now seen corresponding path program 51 times [2021-06-05 04:57:47,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:47,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055361436] [2021-06-05 04:57:47,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:47,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:47,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:47,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055361436] [2021-06-05 04:57:47,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055361436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:47,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075132876] [2021-06-05 04:57:47,957 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 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 [2021-06-05 04:57:47,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:47,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:48,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,072 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 16 treesize of output 12 [2021-06-05 04:57:48,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,075 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 15 treesize of output 11 [2021-06-05 04:57:48,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,096 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 04:57:48,097 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:48,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,098 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 04:57:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:48,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075132876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:48,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:48,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:48,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365873725] [2021-06-05 04:57:48,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:48,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:48,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:48,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:48,117 INFO L87 Difference]: Start difference. First operand 63 states and 128 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) [2021-06-05 04:57:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:48,225 INFO L93 Difference]: Finished difference Result 69 states and 137 transitions. [2021-06-05 04:57:48,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:48,225 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 [2021-06-05 04:57:48,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:48,225 INFO L225 Difference]: With dead ends: 69 [2021-06-05 04:57:48,225 INFO L226 Difference]: Without dead ends: 69 [2021-06-05 04:57:48,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-06-05 04:57:48,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 58. [2021-06-05 04:57:48,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.0350877192982457) internal successors, (116), 57 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) [2021-06-05 04:57:48,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 116 transitions. [2021-06-05 04:57:48,227 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 116 transitions. Word has length 15 [2021-06-05 04:57:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:48,227 INFO L482 AbstractCegarLoop]: Abstraction has 58 states and 116 transitions. [2021-06-05 04:57:48,227 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) [2021-06-05 04:57:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 116 transitions. [2021-06-05 04:57:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:48,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:48,227 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:48,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 04:57:48,428 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:48,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:48,428 INFO L82 PathProgramCache]: Analyzing trace with hash -905034965, now seen corresponding path program 52 times [2021-06-05 04:57:48,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:48,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491056793] [2021-06-05 04:57:48,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:48,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:48,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491056793] [2021-06-05 04:57:48,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491056793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:48,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410503761] [2021-06-05 04:57:48,495 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 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 [2021-06-05 04:57:48,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:48,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:48,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:48,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:48,746 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 [2021-06-05 04:57:48,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,749 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:48,749 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,783 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 04:57:48,783 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:48,786 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 [2021-06-05 04:57:48,787 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:48,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:48,800 INFO L518 ElimStorePlain]: Eliminatee v_prenex_48 vanished before elimination [2021-06-05 04:57:48,801 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:48,801 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 04:57:48,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:48,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410503761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:48,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:48,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:48,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690554185] [2021-06-05 04:57:48,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:48,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:48,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:48,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:48,825 INFO L87 Difference]: Start difference. First operand 58 states and 116 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) [2021-06-05 04:57:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:48,991 INFO L93 Difference]: Finished difference Result 63 states and 122 transitions. [2021-06-05 04:57:48,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:48,992 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 [2021-06-05 04:57:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:48,992 INFO L225 Difference]: With dead ends: 63 [2021-06-05 04:57:48,992 INFO L226 Difference]: Without dead ends: 59 [2021-06-05 04:57:48,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 231.2ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:57:48,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-06-05 04:57:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 56. [2021-06-05 04:57:48,993 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) [2021-06-05 04:57:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 111 transitions. [2021-06-05 04:57:48,993 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 111 transitions. Word has length 15 [2021-06-05 04:57:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:48,993 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 111 transitions. [2021-06-05 04:57:48,993 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) [2021-06-05 04:57:48,994 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 111 transitions. [2021-06-05 04:57:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:48,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:48,994 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:49,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1114,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:49,209 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1069052448, now seen corresponding path program 53 times [2021-06-05 04:57:49,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:49,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280000031] [2021-06-05 04:57:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:49,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:49,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280000031] [2021-06-05 04:57:49,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280000031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:49,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537745977] [2021-06-05 04:57:49,256 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:57:49,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:49,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:49,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:49,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:49,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:49,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:49,371 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 16 treesize of output 12 [2021-06-05 04:57:49,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:49,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:49,374 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 15 treesize of output 11 [2021-06-05 04:57:49,374 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:49,399 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:57:49,399 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:49,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:49,400 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:57:49,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:49,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537745977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:49,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:49,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:49,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775339230] [2021-06-05 04:57:49,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:49,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:49,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:49,442 INFO L87 Difference]: Start difference. First operand 56 states and 111 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) [2021-06-05 04:57:49,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:49,749 INFO L93 Difference]: Finished difference Result 86 states and 159 transitions. [2021-06-05 04:57:49,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:49,749 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 15 [2021-06-05 04:57:49,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:49,750 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:57:49,750 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:57:49,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 338.3ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:57:49,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 61. [2021-06-05 04:57:49,751 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) [2021-06-05 04:57:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 04:57:49,751 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 04:57:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:49,751 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 04:57:49,751 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) [2021-06-05 04:57:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 04:57:49,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:49,751 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:49,751 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:49,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1141,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:49,961 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:49,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:49,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1322207713, now seen corresponding path program 54 times [2021-06-05 04:57:49,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:49,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835255055] [2021-06-05 04:57:49,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:50,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:50,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835255055] [2021-06-05 04:57:50,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835255055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:50,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902190442] [2021-06-05 04:57:50,009 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 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 [2021-06-05 04:57:50,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:57:50,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:50,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:50,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,162 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 16 treesize of output 12 [2021-06-05 04:57:50,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,166 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 [2021-06-05 04:57:50,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,206 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:57:50,208 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 [2021-06-05 04:57:50,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:50,223 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:50,223 INFO L518 ElimStorePlain]: Eliminatee v_prenex_51 vanished before elimination [2021-06-05 04:57:50,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:50,224 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:50,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:50,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902190442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:50,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:50,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:50,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186803465] [2021-06-05 04:57:50,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:50,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:50,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:50,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:50,269 INFO L87 Difference]: Start difference. First operand 61 states and 122 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:50,483 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-05 04:57:50,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:50,484 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 [2021-06-05 04:57:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:50,484 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:57:50,484 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:57:50,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 260.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:50,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:57:50,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2021-06-05 04:57:50,486 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) [2021-06-05 04:57:50,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 04:57:50,486 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 04:57:50,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:50,486 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 04:57:50,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:57:50,487 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 04:57:50,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:50,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:50,487 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:50,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:50,702 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:50,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:50,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1769545436, now seen corresponding path program 55 times [2021-06-05 04:57:50,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:50,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644706875] [2021-06-05 04:57:50,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:50,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:50,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644706875] [2021-06-05 04:57:50,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644706875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:50,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851291180] [2021-06-05 04:57:50,751 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 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 [2021-06-05 04:57:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:50,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:50,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:50,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:50,912 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 15 treesize of output 11 [2021-06-05 04:57:50,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:50,939 INFO L628 ElimStorePlain]: treesize reduction 49, result has 34.7 percent of original size [2021-06-05 04:57:50,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_54 vanished before elimination [2021-06-05 04:57:50,939 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:50,939 INFO L518 ElimStorePlain]: Eliminatee v_prenex_53 vanished before elimination [2021-06-05 04:57:50,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:50,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:82, output treesize:18 [2021-06-05 04:57:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:50,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851291180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:50,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:50,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:50,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611128981] [2021-06-05 04:57:50,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:50,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:50,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:50,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:50,979 INFO L87 Difference]: Start difference. First operand 61 states and 122 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) [2021-06-05 04:57:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:51,197 INFO L93 Difference]: Finished difference Result 89 states and 168 transitions. [2021-06-05 04:57:51,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:51,197 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 [2021-06-05 04:57:51,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:51,197 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:57:51,198 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:57:51,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 262.7ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:51,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:57:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 61. [2021-06-05 04:57:51,199 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) [2021-06-05 04:57:51,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 122 transitions. [2021-06-05 04:57:51,199 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 122 transitions. Word has length 15 [2021-06-05 04:57:51,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:51,199 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 122 transitions. [2021-06-05 04:57:51,199 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) [2021-06-05 04:57:51,199 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 122 transitions. [2021-06-05 04:57:51,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:51,199 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:51,199 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:51,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1162 [2021-06-05 04:57:51,409 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:51,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:51,409 INFO L82 PathProgramCache]: Analyzing trace with hash 542624615, now seen corresponding path program 56 times [2021-06-05 04:57:51,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:51,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508806883] [2021-06-05 04:57:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:51,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508806883] [2021-06-05 04:57:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508806883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:51,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871899808] [2021-06-05 04:57:51,452 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 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 [2021-06-05 04:57:51,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:51,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:51,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:51,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:51,598 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 [2021-06-05 04:57:51,599 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:51,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:51,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:57:51,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:51,640 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 04:57:51,641 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:51,644 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 [2021-06-05 04:57:51,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:51,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:51,660 INFO L518 ElimStorePlain]: Eliminatee v_prenex_56 vanished before elimination [2021-06-05 04:57:51,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:57:51,661 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:57:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:51,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871899808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:51,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:51,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:51,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317147227] [2021-06-05 04:57:51,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:51,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:51,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:51,731 INFO L87 Difference]: Start difference. First operand 61 states and 122 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) [2021-06-05 04:57:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:52,151 INFO L93 Difference]: Finished difference Result 88 states and 164 transitions. [2021-06-05 04:57:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:57:52,151 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 [2021-06-05 04:57:52,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:52,152 INFO L225 Difference]: With dead ends: 88 [2021-06-05 04:57:52,152 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:57:52,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 448.2ms TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:57:52,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:57:52,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 60. [2021-06-05 04:57:52,157 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) [2021-06-05 04:57:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 04:57:52,157 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 04:57:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:52,157 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 04:57:52,157 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) [2021-06-05 04:57:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 04:57:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:52,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:52,158 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:52,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 04:57:52,358 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:52,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:52,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1990192058, now seen corresponding path program 57 times [2021-06-05 04:57:52,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:52,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811243077] [2021-06-05 04:57:52,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:52,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:52,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:52,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811243077] [2021-06-05 04:57:52,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811243077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:52,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109075072] [2021-06-05 04:57:52,404 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 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 [2021-06-05 04:57:52,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:57:52,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:52,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,527 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 16 treesize of output 12 [2021-06-05 04:57:52,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:52,530 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 15 treesize of output 11 [2021-06-05 04:57:52,531 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,551 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 04:57:52,551 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:52,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:57:52,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 04:57:52,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:52,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109075072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:52,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:52,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:52,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243024742] [2021-06-05 04:57:52,570 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:52,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:52,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:52,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:52,570 INFO L87 Difference]: Start difference. First operand 60 states and 119 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) [2021-06-05 04:57:52,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:52,672 INFO L93 Difference]: Finished difference Result 73 states and 143 transitions. [2021-06-05 04:57:52,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:52,673 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 [2021-06-05 04:57:52,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:52,673 INFO L225 Difference]: With dead ends: 73 [2021-06-05 04:57:52,673 INFO L226 Difference]: Without dead ends: 73 [2021-06-05 04:57:52,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-06-05 04:57:52,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 60. [2021-06-05 04:57:52,674 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) [2021-06-05 04:57:52,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 119 transitions. [2021-06-05 04:57:52,674 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 119 transitions. Word has length 15 [2021-06-05 04:57:52,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:52,674 INFO L482 AbstractCegarLoop]: Abstraction has 60 states and 119 transitions. [2021-06-05 04:57:52,674 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) [2021-06-05 04:57:52,674 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 119 transitions. [2021-06-05 04:57:52,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:52,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:52,675 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:52,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:52,877 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1618335771, now seen corresponding path program 58 times [2021-06-05 04:57:52,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:52,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848335880] [2021-06-05 04:57:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:52,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848335880] [2021-06-05 04:57:52,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848335880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:52,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418586111] [2021-06-05 04:57:52,920 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 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 [2021-06-05 04:57:52,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:52,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:52,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:52,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:53,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:57:53,190 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 15 treesize of output 11 [2021-06-05 04:57:53,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:57:53,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,230 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 04:57:53,230 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:57:53,232 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 [2021-06-05 04:57:53,233 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:57:53,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:57:53,245 INFO L518 ElimStorePlain]: Eliminatee v_prenex_62 vanished before elimination [2021-06-05 04:57:53,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:57:53,246 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 04:57:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:53,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418586111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:53,270 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:53,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 04:57:53,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937917857] [2021-06-05 04:57:53,270 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:53,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:53,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:53,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:53,271 INFO L87 Difference]: Start difference. First operand 60 states and 119 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) [2021-06-05 04:57:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:53,480 INFO L93 Difference]: Finished difference Result 80 states and 146 transitions. [2021-06-05 04:57:53,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:57:53,481 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 [2021-06-05 04:57:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:53,481 INFO L225 Difference]: With dead ends: 80 [2021-06-05 04:57:53,481 INFO L226 Difference]: Without dead ends: 76 [2021-06-05 04:57:53,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-06-05 04:57:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 59. [2021-06-05 04:57:53,482 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) [2021-06-05 04:57:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 116 transitions. [2021-06-05 04:57:53,482 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 116 transitions. Word has length 15 [2021-06-05 04:57:53,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:53,483 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 116 transitions. [2021-06-05 04:57:53,483 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) [2021-06-05 04:57:53,483 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 116 transitions. [2021-06-05 04:57:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:53,483 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:53,483 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:53,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1200 [2021-06-05 04:57:53,689 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:53,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:53,690 INFO L82 PathProgramCache]: Analyzing trace with hash 2071591114, now seen corresponding path program 59 times [2021-06-05 04:57:53,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:53,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582701404] [2021-06-05 04:57:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:53,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:53,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:53,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582701404] [2021-06-05 04:57:53,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582701404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:53,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587186403] [2021-06-05 04:57:53,738 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 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 [2021-06-05 04:57:53,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:53,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:53,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:53,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:53,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587186403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:53,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:53,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:57:53,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657863722] [2021-06-05 04:57:53,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:53,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:53,833 INFO L87 Difference]: Start difference. First operand 59 states and 116 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) [2021-06-05 04:57:53,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:53,973 INFO L93 Difference]: Finished difference Result 81 states and 149 transitions. [2021-06-05 04:57:53,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 04:57:53,973 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 [2021-06-05 04:57:53,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:53,973 INFO L225 Difference]: With dead ends: 81 [2021-06-05 04:57:53,973 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:57:53,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:53,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:57:53,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 52. [2021-06-05 04:57:53,975 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) [2021-06-05 04:57:53,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 101 transitions. [2021-06-05 04:57:53,975 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 101 transitions. Word has length 15 [2021-06-05 04:57:53,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:53,975 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 101 transitions. [2021-06-05 04:57:53,975 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) [2021-06-05 04:57:53,975 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 101 transitions. [2021-06-05 04:57:53,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 04:57:53,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:53,975 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:54,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-06-05 04:57:54,191 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:54,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:54,192 INFO L82 PathProgramCache]: Analyzing trace with hash 99296973, now seen corresponding path program 60 times [2021-06-05 04:57:54,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:54,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499704295] [2021-06-05 04:57:54,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:54,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:54,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499704295] [2021-06-05 04:57:54,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499704295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:54,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132072765] [2021-06-05 04:57:54,233 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 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 [2021-06-05 04:57:54,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:54,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:54,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 04:57:54,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:54,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132072765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:54,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:54,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-05 04:57:54,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272213352] [2021-06-05 04:57:54,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:54,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:54,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:54,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:54,361 INFO L87 Difference]: Start difference. First operand 52 states and 101 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) [2021-06-05 04:57:54,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:54,506 INFO L93 Difference]: Finished difference Result 58 states and 108 transitions. [2021-06-05 04:57:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:54,506 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 [2021-06-05 04:57:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:54,507 INFO L225 Difference]: With dead ends: 58 [2021-06-05 04:57:54,507 INFO L226 Difference]: Without dead ends: 52 [2021-06-05 04:57:54,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 171.1ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-06-05 04:57:54,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-06-05 04:57:54,508 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) [2021-06-05 04:57:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 100 transitions. [2021-06-05 04:57:54,508 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 100 transitions. Word has length 15 [2021-06-05 04:57:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:54,508 INFO L482 AbstractCegarLoop]: Abstraction has 52 states and 100 transitions. [2021-06-05 04:57:54,508 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) [2021-06-05 04:57:54,508 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 100 transitions. [2021-06-05 04:57:54,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:57:54,508 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:54,508 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:54,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1219,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:54,717 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:54,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:54,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2072597181, now seen corresponding path program 61 times [2021-06-05 04:57:54,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:54,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408622234] [2021-06-05 04:57:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:54,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:54,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408622234] [2021-06-05 04:57:54,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408622234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:54,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335321795] [2021-06-05 04:57:54,874 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 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 [2021-06-05 04:57:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:54,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:57:54,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:55,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335321795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:55,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:55,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:57:55,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357123880] [2021-06-05 04:57:55,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:55,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:55,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:55,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:55,002 INFO L87 Difference]: Start difference. First operand 52 states and 100 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:55,403 INFO L93 Difference]: Finished difference Result 98 states and 183 transitions. [2021-06-05 04:57:55,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:55,403 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:55,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:55,404 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:57:55,404 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:57:55,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 486.7ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:55,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:57:55,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 62. [2021-06-05 04:57:55,405 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) [2021-06-05 04:57:55,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 119 transitions. [2021-06-05 04:57:55,405 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 119 transitions. Word has length 16 [2021-06-05 04:57:55,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:55,405 INFO L482 AbstractCegarLoop]: Abstraction has 62 states and 119 transitions. [2021-06-05 04:57:55,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:55,405 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 119 transitions. [2021-06-05 04:57:55,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:57:55,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:55,405 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:55,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1225 [2021-06-05 04:57:55,606 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:55,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:55,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1529967491, now seen corresponding path program 62 times [2021-06-05 04:57:55,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:55,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843625618] [2021-06-05 04:57:55,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:55,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:55,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843625618] [2021-06-05 04:57:55,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843625618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:55,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736652888] [2021-06-05 04:57:55,778 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 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 [2021-06-05 04:57:55,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:57:55,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:55,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:57:55,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:55,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736652888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:55,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:55,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:57:55,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149893281] [2021-06-05 04:57:55,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:55,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:55,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:55,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:55,951 INFO L87 Difference]: Start difference. First operand 62 states and 119 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) [2021-06-05 04:57:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:56,250 INFO L93 Difference]: Finished difference Result 102 states and 191 transitions. [2021-06-05 04:57:56,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:56,250 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 16 [2021-06-05 04:57:56,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:56,251 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:57:56,251 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 04:57:56,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 403.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 04:57:56,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-06-05 04:57:56,252 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) [2021-06-05 04:57:56,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 122 transitions. [2021-06-05 04:57:56,252 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 122 transitions. Word has length 16 [2021-06-05 04:57:56,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:56,252 INFO L482 AbstractCegarLoop]: Abstraction has 63 states and 122 transitions. [2021-06-05 04:57:56,252 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) [2021-06-05 04:57:56,252 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 122 transitions. [2021-06-05 04:57:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:57:56,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:56,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:56,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,66 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:56,469 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:56,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:56,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1289521343, now seen corresponding path program 63 times [2021-06-05 04:57:56,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:56,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220972367] [2021-06-05 04:57:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:56,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:56,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220972367] [2021-06-05 04:57:56,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220972367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:56,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538344282] [2021-06-05 04:57:56,714 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 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 [2021-06-05 04:57:56,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:57:56,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:56,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:57:56,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:56,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538344282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:56,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:56,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:57:56,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555105581] [2021-06-05 04:57:56,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:57:56,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:56,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:57:56,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:57:56,940 INFO L87 Difference]: Start difference. First operand 63 states and 122 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) [2021-06-05 04:57:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:57,273 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 04:57:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:57,274 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 [2021-06-05 04:57:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:57,274 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:57:57,274 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:57:57,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 602.4ms TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:57:57,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:57:57,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 64. [2021-06-05 04:57:57,275 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) [2021-06-05 04:57:57,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 125 transitions. [2021-06-05 04:57:57,275 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 125 transitions. Word has length 16 [2021-06-05 04:57:57,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:57,275 INFO L482 AbstractCegarLoop]: Abstraction has 64 states and 125 transitions. [2021-06-05 04:57:57,275 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) [2021-06-05 04:57:57,275 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 125 transitions. [2021-06-05 04:57:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:57:57,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:57,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:57,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:57,476 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:57,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:57,476 INFO L82 PathProgramCache]: Analyzing trace with hash 589028355, now seen corresponding path program 64 times [2021-06-05 04:57:57,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:57,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823305312] [2021-06-05 04:57:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:57,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823305312] [2021-06-05 04:57:57,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823305312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:57,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588331784] [2021-06-05 04:57:57,765 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 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 [2021-06-05 04:57:57,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:57:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:57:57,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:57,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588331784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:57,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:57,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 04:57:57,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578329799] [2021-06-05 04:57:57,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 04:57:57,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:57,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 04:57:57,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:57:57,985 INFO L87 Difference]: Start difference. First operand 64 states and 125 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) [2021-06-05 04:57:58,269 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 58 [2021-06-05 04:57:58,402 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 53 [2021-06-05 04:57:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:58,413 INFO L93 Difference]: Finished difference Result 115 states and 210 transitions. [2021-06-05 04:57:58,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:58,413 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 16 [2021-06-05 04:57:58,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:58,413 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:57:58,413 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:57:58,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 702.8ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:57:58,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:57:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 65. [2021-06-05 04:57:58,415 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) [2021-06-05 04:57:58,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 04:57:58,415 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 04:57:58,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:58,415 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 04:57:58,415 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) [2021-06-05 04:57:58,415 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 04:57:58,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:57:58,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:58,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:58,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1279,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:57:58,617 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash -2014354305, now seen corresponding path program 65 times [2021-06-05 04:57:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:58,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842827647] [2021-06-05 04:57:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:58,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:58,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:58,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842827647] [2021-06-05 04:57:58,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842827647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:58,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494414580] [2021-06-05 04:57:58,798 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 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 [2021-06-05 04:57:58,833 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:57:58,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:58,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:57:58,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:58,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494414580] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:58,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:58,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:57:58,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692689287] [2021-06-05 04:57:58,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:57:58,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:58,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:57:58,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:57:58,927 INFO L87 Difference]: Start difference. First operand 65 states and 128 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:59,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:57:59,207 INFO L93 Difference]: Finished difference Result 103 states and 194 transitions. [2021-06-05 04:57:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:57:59,208 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:57:59,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:57:59,208 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:57:59,208 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:57:59,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 385.8ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:57:59,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:57:59,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 65. [2021-06-05 04:57:59,209 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) [2021-06-05 04:57:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 128 transitions. [2021-06-05 04:57:59,209 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 128 transitions. Word has length 16 [2021-06-05 04:57:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:57:59,210 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 128 transitions. [2021-06-05 04:57:59,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:57:59,210 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 128 transitions. [2021-06-05 04:57:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:57:59,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:57:59,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:57:59,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-06-05 04:57:59,410 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:57:59,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:57:59,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1211754831, now seen corresponding path program 66 times [2021-06-05 04:57:59,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:57:59,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403290385] [2021-06-05 04:57:59,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:57:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:57:59,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:59,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:57:59,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403290385] [2021-06-05 04:57:59,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403290385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:59,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835669229] [2021-06-05 04:57:59,631 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 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 [2021-06-05 04:57:59,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:57:59,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:57:59,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:57:59,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:57:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:57:59,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835669229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:57:59,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:57:59,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:57:59,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377134188] [2021-06-05 04:57:59,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:57:59,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:57:59,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:57:59,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:57:59,893 INFO L87 Difference]: Start difference. First operand 65 states and 128 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) [2021-06-05 04:58:00,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:00,067 INFO L93 Difference]: Finished difference Result 85 states and 162 transitions. [2021-06-05 04:58:00,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:00,067 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 16 [2021-06-05 04:58:00,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:00,067 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:58:00,067 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:58:00,067 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 337.4ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:58:00,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 67. [2021-06-05 04:58:00,068 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) [2021-06-05 04:58:00,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 133 transitions. [2021-06-05 04:58:00,069 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 133 transitions. Word has length 16 [2021-06-05 04:58:00,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:00,069 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 133 transitions. [2021-06-05 04:58:00,069 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) [2021-06-05 04:58:00,069 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 133 transitions. [2021-06-05 04:58:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:00,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:00,069 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:00,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1301 [2021-06-05 04:58:00,281 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:00,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:00,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1452200979, now seen corresponding path program 67 times [2021-06-05 04:58:00,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:00,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872219061] [2021-06-05 04:58:00,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:00,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:00,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872219061] [2021-06-05 04:58:00,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872219061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:00,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877398177] [2021-06-05 04:58:00,592 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 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 [2021-06-05 04:58:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:00,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:00,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:00,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877398177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:00,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:00,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 04:58:00,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917185090] [2021-06-05 04:58:00,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:00,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:00,881 INFO L87 Difference]: Start difference. First operand 67 states and 133 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) [2021-06-05 04:58:01,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:01,093 INFO L93 Difference]: Finished difference Result 89 states and 170 transitions. [2021-06-05 04:58:01,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:01,094 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 16 [2021-06-05 04:58:01,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:01,094 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:58:01,094 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:58:01,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 452.1ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:58:01,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 68. [2021-06-05 04:58:01,095 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) [2021-06-05 04:58:01,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 136 transitions. [2021-06-05 04:58:01,095 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 136 transitions. Word has length 16 [2021-06-05 04:58:01,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:01,096 INFO L482 AbstractCegarLoop]: Abstraction has 68 states and 136 transitions. [2021-06-05 04:58:01,096 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) [2021-06-05 04:58:01,096 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 136 transitions. [2021-06-05 04:58:01,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:01,096 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:01,096 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:01,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1370 [2021-06-05 04:58:01,296 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:01,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2142273329, now seen corresponding path program 68 times [2021-06-05 04:58:01,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:01,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208806979] [2021-06-05 04:58:01,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:01,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:01,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208806979] [2021-06-05 04:58:01,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208806979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:01,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014971407] [2021-06-05 04:58:01,452 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 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 [2021-06-05 04:58:01,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:01,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:01,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:01,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:01,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014971407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:01,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:01,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:01,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916058732] [2021-06-05 04:58:01,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:01,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:01,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:01,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:01,589 INFO L87 Difference]: Start difference. First operand 68 states and 136 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:01,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:01,785 INFO L93 Difference]: Finished difference Result 101 states and 189 transitions. [2021-06-05 04:58:01,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:01,785 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:01,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:01,786 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:58:01,786 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:58:01,786 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 270.8ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:58:01,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 69. [2021-06-05 04:58:01,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:01,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 140 transitions. [2021-06-05 04:58:01,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 140 transitions. Word has length 16 [2021-06-05 04:58:01,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:01,787 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 140 transitions. [2021-06-05 04:58:01,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:01,787 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 140 transitions. [2021-06-05 04:58:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:01,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:01,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:02,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-05 04:58:02,003 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash -461109331, now seen corresponding path program 69 times [2021-06-05 04:58:02,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:02,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520446246] [2021-06-05 04:58:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:02,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520446246] [2021-06-05 04:58:02,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520446246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:02,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768284286] [2021-06-05 04:58:02,211 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 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 [2021-06-05 04:58:02,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:02,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:02,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768284286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:02,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:02,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:58:02,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896734086] [2021-06-05 04:58:02,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:58:02,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:02,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:58:02,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:02,667 INFO L87 Difference]: Start difference. First operand 69 states and 140 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-06-05 04:58:02,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:02,922 INFO L93 Difference]: Finished difference Result 89 states and 169 transitions. [2021-06-05 04:58:02,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:02,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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 16 [2021-06-05 04:58:02,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:02,923 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:58:02,923 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:58:02,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:58:02,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:58:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2021-06-05 04:58:02,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.0441176470588234) internal successors, (139), 68 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) [2021-06-05 04:58:02,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 139 transitions. [2021-06-05 04:58:02,926 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 139 transitions. Word has length 16 [2021-06-05 04:58:02,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:02,927 INFO L482 AbstractCegarLoop]: Abstraction has 69 states and 139 transitions. [2021-06-05 04:58:02,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 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) [2021-06-05 04:58:02,927 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 139 transitions. [2021-06-05 04:58:02,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:02,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:02,927 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:03,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-06-05 04:58:03,137 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:03,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:03,137 INFO L82 PathProgramCache]: Analyzing trace with hash -864455657, now seen corresponding path program 70 times [2021-06-05 04:58:03,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:03,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316652363] [2021-06-05 04:58:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:03,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:03,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:03,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316652363] [2021-06-05 04:58:03,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316652363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:03,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558194218] [2021-06-05 04:58:03,319 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 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 [2021-06-05 04:58:03,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:03,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:03,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:03,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:03,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:03,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558194218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:03,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:03,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:03,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62219140] [2021-06-05 04:58:03,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:03,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:03,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:03,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:03,495 INFO L87 Difference]: Start difference. First operand 69 states and 139 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:03,633 INFO L93 Difference]: Finished difference Result 86 states and 168 transitions. [2021-06-05 04:58:03,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:03,634 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:58:03,634 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:58:03,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 272.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:03,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:58:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2021-06-05 04:58:03,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.057142857142857) internal successors, (144), 70 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) [2021-06-05 04:58:03,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 144 transitions. [2021-06-05 04:58:03,635 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 144 transitions. Word has length 16 [2021-06-05 04:58:03,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:03,635 INFO L482 AbstractCegarLoop]: Abstraction has 71 states and 144 transitions. [2021-06-05 04:58:03,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:03,635 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 144 transitions. [2021-06-05 04:58:03,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:03,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:03,635 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:03,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1579,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:03,836 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:03,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:03,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1564948645, now seen corresponding path program 71 times [2021-06-05 04:58:03,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:03,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147191725] [2021-06-05 04:58:03,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:04,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147191725] [2021-06-05 04:58:04,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147191725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:04,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904473493] [2021-06-05 04:58:04,004 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 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 [2021-06-05 04:58:04,057 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:04,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:04,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:04,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:04,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:04,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904473493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:04,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:04,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:04,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533829017] [2021-06-05 04:58:04,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:04,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:04,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:04,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:04,170 INFO L87 Difference]: Start difference. First operand 71 states and 144 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) [2021-06-05 04:58:04,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:04,363 INFO L93 Difference]: Finished difference Result 101 states and 192 transitions. [2021-06-05 04:58:04,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:04,363 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 16 [2021-06-05 04:58:04,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:04,364 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:58:04,364 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:58:04,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 284.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:04,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:58:04,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2021-06-05 04:58:04,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 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) [2021-06-05 04:58:04,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-06-05 04:58:04,365 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-06-05 04:58:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:04,365 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-06-05 04:58:04,365 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) [2021-06-05 04:58:04,365 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-06-05 04:58:04,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:04,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:04,366 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:04,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1621 [2021-06-05 04:58:04,566 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:04,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:04,566 INFO L82 PathProgramCache]: Analyzing trace with hash 126635991, now seen corresponding path program 72 times [2021-06-05 04:58:04,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:04,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805934418] [2021-06-05 04:58:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:04,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:04,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805934418] [2021-06-05 04:58:04,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805934418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:04,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026079586] [2021-06-05 04:58:04,706 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 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 [2021-06-05 04:58:04,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:04,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:04,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:04,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:04,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:04,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026079586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:04,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:04,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:04,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340765549] [2021-06-05 04:58:04,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:04,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:04,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:04,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:04,831 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:04,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:04,995 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 04:58:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:04,996 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:04,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:04,996 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:58:04,996 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:58:04,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:58:04,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 72. [2021-06-05 04:58:04,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.084507042253521) internal successors, (148), 71 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) [2021-06-05 04:58:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 148 transitions. [2021-06-05 04:58:04,997 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 148 transitions. Word has length 16 [2021-06-05 04:58:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:04,997 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 148 transitions. [2021-06-05 04:58:04,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:04,998 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 148 transitions. [2021-06-05 04:58:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:04,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:04,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:05,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1644,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:05,209 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2100178447, now seen corresponding path program 73 times [2021-06-05 04:58:05,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:05,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008683654] [2021-06-05 04:58:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:05,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:05,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008683654] [2021-06-05 04:58:05,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008683654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:05,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95818466] [2021-06-05 04:58:05,411 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 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 [2021-06-05 04:58:05,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:05,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:05,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:05,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95818466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:05,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:05,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:05,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485499859] [2021-06-05 04:58:05,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:05,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:05,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:05,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:05,542 INFO L87 Difference]: Start difference. First operand 72 states and 148 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:05,724 INFO L93 Difference]: Finished difference Result 99 states and 192 transitions. [2021-06-05 04:58:05,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:05,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:05,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:05,725 INFO L225 Difference]: With dead ends: 99 [2021-06-05 04:58:05,725 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:58:05,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 324.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:05,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:58:05,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2021-06-05 04:58:05,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1232876712328768) internal successors, (155), 73 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) [2021-06-05 04:58:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 155 transitions. [2021-06-05 04:58:05,726 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 155 transitions. Word has length 16 [2021-06-05 04:58:05,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:05,726 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 155 transitions. [2021-06-05 04:58:05,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:05,726 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 155 transitions. [2021-06-05 04:58:05,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:05,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:05,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:05,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1661 [2021-06-05 04:58:05,941 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:05,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:05,941 INFO L82 PathProgramCache]: Analyzing trace with hash -408593811, now seen corresponding path program 74 times [2021-06-05 04:58:05,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:05,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059163280] [2021-06-05 04:58:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:05,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:06,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059163280] [2021-06-05 04:58:06,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059163280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:06,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495103278] [2021-06-05 04:58:06,128 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 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 [2021-06-05 04:58:06,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:06,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:06,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:06,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:06,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:06,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495103278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:06,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:06,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:06,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429279401] [2021-06-05 04:58:06,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:06,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:06,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:06,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:06,254 INFO L87 Difference]: Start difference. First operand 74 states and 155 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:06,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:06,420 INFO L93 Difference]: Finished difference Result 101 states and 194 transitions. [2021-06-05 04:58:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:06,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2021-06-05 04:58:06,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:06,421 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:58:06,421 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:58:06,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 304.5ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:58:06,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 73. [2021-06-05 04:58:06,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 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) [2021-06-05 04:58:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-05 04:58:06,422 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-06-05 04:58:06,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:06,422 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-05 04:58:06,422 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:06,422 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-05 04:58:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:06,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:06,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:06,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1673 [2021-06-05 04:58:06,623 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash -235346119, now seen corresponding path program 75 times [2021-06-05 04:58:06,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:06,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334759543] [2021-06-05 04:58:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:06,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:06,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:06,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334759543] [2021-06-05 04:58:06,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334759543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:06,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860665752] [2021-06-05 04:58:06,813 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 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 [2021-06-05 04:58:06,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:06,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:06,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:06,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:06,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860665752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:06,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:06,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:06,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592941866] [2021-06-05 04:58:06,955 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:06,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:06,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:06,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:06,956 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:07,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:07,095 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 04:58:07,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:07,096 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:07,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:07,096 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:58:07,096 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:58:07,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 290.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:58:07,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 73. [2021-06-05 04:58:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0972222222222223) internal successors, (151), 72 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) [2021-06-05 04:58:07,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 151 transitions. [2021-06-05 04:58:07,097 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 151 transitions. Word has length 16 [2021-06-05 04:58:07,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:07,097 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 151 transitions. [2021-06-05 04:58:07,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:07,098 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 151 transitions. [2021-06-05 04:58:07,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:07,098 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:07,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:07,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1686 [2021-06-05 04:58:07,313 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:07,313 INFO L82 PathProgramCache]: Analyzing trace with hash -305800893, now seen corresponding path program 76 times [2021-06-05 04:58:07,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:07,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176797872] [2021-06-05 04:58:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:07,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:07,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:07,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176797872] [2021-06-05 04:58:07,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176797872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:07,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13579213] [2021-06-05 04:58:07,504 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 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 [2021-06-05 04:58:07,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:07,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:07,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:07,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:07,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13579213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:07,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:07,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:07,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949946663] [2021-06-05 04:58:07,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:07,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:07,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:07,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:07,714 INFO L87 Difference]: Start difference. First operand 73 states and 151 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:07,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:07,862 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-06-05 04:58:07,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:07,862 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:07,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:07,862 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:58:07,862 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:58:07,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:58:07,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2021-06-05 04:58:07,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 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) [2021-06-05 04:58:07,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 04:58:07,864 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 04:58:07,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:07,864 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 04:58:07,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:07,864 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 04:58:07,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:07,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:07,864 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:08,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1700,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:08,080 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:08,080 INFO L82 PathProgramCache]: Analyzing trace with hash -546247041, now seen corresponding path program 77 times [2021-06-05 04:58:08,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:08,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411798980] [2021-06-05 04:58:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:08,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:08,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411798980] [2021-06-05 04:58:08,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411798980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:08,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700453376] [2021-06-05 04:58:08,281 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 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 [2021-06-05 04:58:08,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:08,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:08,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:08,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700453376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:08,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:08,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 04:58:08,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136450489] [2021-06-05 04:58:08,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:08,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:08,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:08,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:08,520 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-06-05 04:58:08,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:08,686 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-05 04:58:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 16 [2021-06-05 04:58:08,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:08,687 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:58:08,687 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:58:08,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 344.7ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:08,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:58:08,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 77. [2021-06-05 04:58:08,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:08,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-06-05 04:58:08,688 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-06-05 04:58:08,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:08,688 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-06-05 04:58:08,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-06-05 04:58:08,688 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-06-05 04:58:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:08,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:08,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:08,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1757,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:08,905 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:08,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:08,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1246740029, now seen corresponding path program 78 times [2021-06-05 04:58:08,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:08,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781314275] [2021-06-05 04:58:08,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:09,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:09,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781314275] [2021-06-05 04:58:09,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781314275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:09,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927693606] [2021-06-05 04:58:09,052 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 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 [2021-06-05 04:58:09,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:09,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:09,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:09,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:09,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927693606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:09,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:09,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:09,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656163188] [2021-06-05 04:58:09,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:09,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:09,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:09,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:09,176 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:09,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:09,387 INFO L93 Difference]: Finished difference Result 110 states and 214 transitions. [2021-06-05 04:58:09,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:09,387 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:09,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:09,387 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:58:09,388 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:58:09,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:09,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:58:09,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 78. [2021-06-05 04:58:09,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.142857142857143) internal successors, (165), 77 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) [2021-06-05 04:58:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 165 transitions. [2021-06-05 04:58:09,389 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 165 transitions. Word has length 16 [2021-06-05 04:58:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:09,389 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 165 transitions. [2021-06-05 04:58:09,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:09,389 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 165 transitions. [2021-06-05 04:58:09,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:09,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:09,389 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:09,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1798,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:09,606 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:09,606 INFO L82 PathProgramCache]: Analyzing trace with hash 444844607, now seen corresponding path program 79 times [2021-06-05 04:58:09,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:09,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478296671] [2021-06-05 04:58:09,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:09,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478296671] [2021-06-05 04:58:09,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478296671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:09,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873793499] [2021-06-05 04:58:09,789 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 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 [2021-06-05 04:58:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:09,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:09,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:09,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873793499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:09,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:09,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:09,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054322495] [2021-06-05 04:58:09,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:09,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:09,914 INFO L87 Difference]: Start difference. First operand 78 states and 165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:10,089 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 04:58:10,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:10,090 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2021-06-05 04:58:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:10,090 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:58:10,090 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:58:10,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:10,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:58:10,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-06-05 04:58:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 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) [2021-06-05 04:58:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 04:58:10,091 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 04:58:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:10,092 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 04:58:10,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:10,092 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 04:58:10,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:10,092 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:10,092 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:10,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1813,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:10,305 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:10,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:10,305 INFO L82 PathProgramCache]: Analyzing trace with hash 41498281, now seen corresponding path program 80 times [2021-06-05 04:58:10,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:10,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108344976] [2021-06-05 04:58:10,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:10,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:10,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108344976] [2021-06-05 04:58:10,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108344976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:10,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748766738] [2021-06-05 04:58:10,502 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 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 [2021-06-05 04:58:10,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:10,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:10,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:10,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:10,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748766738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:10,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:10,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:10,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756336343] [2021-06-05 04:58:10,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:10,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:10,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:10,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:10,645 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:10,794 INFO L93 Difference]: Finished difference Result 93 states and 187 transitions. [2021-06-05 04:58:10,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:10,794 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:10,794 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:58:10,794 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:58:10,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:10,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:58:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 78. [2021-06-05 04:58:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 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) [2021-06-05 04:58:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 04:58:10,796 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 04:58:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:10,796 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 04:58:10,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 04:58:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:10,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:10,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:11,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1828,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:11,007 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:11,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:11,008 INFO L82 PathProgramCache]: Analyzing trace with hash -658994707, now seen corresponding path program 81 times [2021-06-05 04:58:11,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:11,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289390628] [2021-06-05 04:58:11,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:11,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:11,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289390628] [2021-06-05 04:58:11,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289390628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:11,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904996659] [2021-06-05 04:58:11,198 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 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 [2021-06-05 04:58:11,224 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:11,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:11,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:11,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:11,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904996659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:11,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:11,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:11,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740155187] [2021-06-05 04:58:11,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:11,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:11,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:11,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:11,341 INFO L87 Difference]: Start difference. First operand 78 states and 163 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) [2021-06-05 04:58:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:11,565 INFO L93 Difference]: Finished difference Result 108 states and 211 transitions. [2021-06-05 04:58:11,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:11,566 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 16 [2021-06-05 04:58:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:11,566 INFO L225 Difference]: With dead ends: 108 [2021-06-05 04:58:11,566 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:58:11,566 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 353.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:11,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:58:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2021-06-05 04:58:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:11,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 04:58:11,568 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 04:58:11,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:11,568 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 04:58:11,568 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) [2021-06-05 04:58:11,568 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 04:58:11,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:11,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:11,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:11,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1845 [2021-06-05 04:58:11,773 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:11,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:11,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1032589929, now seen corresponding path program 82 times [2021-06-05 04:58:11,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:11,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151074486] [2021-06-05 04:58:11,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:11,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:11,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:11,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151074486] [2021-06-05 04:58:11,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151074486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:11,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909374877] [2021-06-05 04:58:11,968 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 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 [2021-06-05 04:58:11,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:11,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:11,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:11,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:12,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909374877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:12,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:12,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 04:58:12,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787251964] [2021-06-05 04:58:12,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:12,461 INFO L87 Difference]: Start difference. First operand 79 states and 167 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) [2021-06-05 04:58:12,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:12,634 INFO L93 Difference]: Finished difference Result 96 states and 193 transitions. [2021-06-05 04:58:12,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:12,634 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 16 [2021-06-05 04:58:12,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:12,634 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:58:12,634 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:58:12,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:12,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:58:12,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 04:58:12,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 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) [2021-06-05 04:58:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 04:58:12,636 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 04:58:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:12,636 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 04:58:12,636 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) [2021-06-05 04:58:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 04:58:12,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:12,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:12,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:12,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1864,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:12,836 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1194224509, now seen corresponding path program 83 times [2021-06-05 04:58:12,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:12,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140567291] [2021-06-05 04:58:12,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:12,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:13,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:13,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140567291] [2021-06-05 04:58:13,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140567291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:13,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071070295] [2021-06-05 04:58:13,065 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 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 [2021-06-05 04:58:13,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:13,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:13,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:13,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071070295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:13,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:13,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 04:58:13,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483839878] [2021-06-05 04:58:13,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:13,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:13,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:13,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:13,355 INFO L87 Difference]: Start difference. First operand 77 states and 160 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) [2021-06-05 04:58:13,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:13,563 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 04:58:13,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:13,563 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 16 [2021-06-05 04:58:13,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:13,563 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:58:13,563 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:58:13,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:58:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-06-05 04:58:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:13,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 04:58:13,565 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 04:58:13,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:13,565 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 04:58:13,565 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) [2021-06-05 04:58:13,565 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 04:58:13,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:13,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:13,565 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:13,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2013 [2021-06-05 04:58:13,781 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:13,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:13,781 INFO L82 PathProgramCache]: Analyzing trace with hash 497360127, now seen corresponding path program 84 times [2021-06-05 04:58:13,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:13,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910201869] [2021-06-05 04:58:13,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:13,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:13,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910201869] [2021-06-05 04:58:13,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910201869] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:13,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671358738] [2021-06-05 04:58:13,923 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 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 [2021-06-05 04:58:13,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:14,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671358738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:14,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:14,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:14,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579244724] [2021-06-05 04:58:14,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:14,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:14,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:14,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:14,064 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:14,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:14,230 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-06-05 04:58:14,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:14,231 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:14,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:14,231 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:58:14,231 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:58:14,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:14,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:58:14,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 78. [2021-06-05 04:58:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 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) [2021-06-05 04:58:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 04:58:14,232 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 04:58:14,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:14,233 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 04:58:14,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:14,233 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 04:58:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:14,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:14,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:14,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2048 [2021-06-05 04:58:14,448 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:14,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:14,448 INFO L82 PathProgramCache]: Analyzing trace with hash 670607819, now seen corresponding path program 85 times [2021-06-05 04:58:14,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:14,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535152634] [2021-06-05 04:58:14,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:14,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:14,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:14,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535152634] [2021-06-05 04:58:14,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535152634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:14,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181571325] [2021-06-05 04:58:14,614 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 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 [2021-06-05 04:58:14,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:14,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:14,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:14,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181571325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:14,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:14,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:14,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19949628] [2021-06-05 04:58:14,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:14,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:14,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:14,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:14,746 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:14,904 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-06-05 04:58:14,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:14,904 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2021-06-05 04:58:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:14,904 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:58:14,905 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 04:58:14,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 260.5ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:14,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 04:58:14,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-06-05 04:58:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 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) [2021-06-05 04:58:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 04:58:14,906 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 04:58:14,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:14,906 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 04:58:14,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 04:58:14,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:14,906 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:14,906 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:15,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2058 [2021-06-05 04:58:15,121 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:15,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:15,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1081734079, now seen corresponding path program 86 times [2021-06-05 04:58:15,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:15,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962955493] [2021-06-05 04:58:15,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:15,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962955493] [2021-06-05 04:58:15,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962955493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:15,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354763550] [2021-06-05 04:58:15,292 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 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 [2021-06-05 04:58:15,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:15,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:15,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:15,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354763550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:15,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:15,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:15,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665504146] [2021-06-05 04:58:15,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:15,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:15,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:15,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:15,461 INFO L87 Difference]: Start difference. First operand 76 states and 158 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) [2021-06-05 04:58:15,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:15,604 INFO L93 Difference]: Finished difference Result 94 states and 189 transitions. [2021-06-05 04:58:15,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:15,604 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 16 [2021-06-05 04:58:15,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:15,605 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:58:15,605 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:58:15,605 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:15,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:58:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 04:58:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 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) [2021-06-05 04:58:15,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 04:58:15,606 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 04:58:15,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:15,606 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 04:58:15,606 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) [2021-06-05 04:58:15,606 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 04:58:15,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:15,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:15,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:15,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2075,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:15,807 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:15,807 INFO L82 PathProgramCache]: Analyzing trace with hash 381241091, now seen corresponding path program 87 times [2021-06-05 04:58:15,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:15,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327583542] [2021-06-05 04:58:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:16,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:16,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327583542] [2021-06-05 04:58:16,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327583542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:16,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654136226] [2021-06-05 04:58:16,025 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 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 [2021-06-05 04:58:16,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:16,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:16,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:16,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:16,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654136226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:16,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:16,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:58:16,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498776886] [2021-06-05 04:58:16,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:16,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:16,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:16,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:16,559 INFO L87 Difference]: Start difference. First operand 79 states and 165 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) [2021-06-05 04:58:16,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:16,731 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 04:58:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:16,732 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 16 [2021-06-05 04:58:16,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:16,732 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:58:16,732 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:58:16,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:58:16,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:58:16,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 04:58:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:16,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 04:58:16,733 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 04:58:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:16,734 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 04:58:16,734 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) [2021-06-05 04:58:16,734 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 04:58:16,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:16,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:16,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:16,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-06-05 04:58:16,949 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:16,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:16,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2072825727, now seen corresponding path program 88 times [2021-06-05 04:58:16,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:16,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147728139] [2021-06-05 04:58:16,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:16,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:17,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:17,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147728139] [2021-06-05 04:58:17,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147728139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:17,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583734384] [2021-06-05 04:58:17,179 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 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 [2021-06-05 04:58:17,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:17,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:17,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:17,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:17,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583734384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:17,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:17,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 04:58:17,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256346205] [2021-06-05 04:58:17,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:17,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:17,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:17,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:17,346 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:58:17,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:17,568 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-06-05 04:58:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:17,568 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 [2021-06-05 04:58:17,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:17,568 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:58:17,568 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:58:17,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 410.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:17,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:58:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 04:58:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 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) [2021-06-05 04:58:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 04:58:17,570 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 04:58:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:17,570 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 04:58:17,570 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:58:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 04:58:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:17,570 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:17,570 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:17,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2278 [2021-06-05 04:58:17,785 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -153988711, now seen corresponding path program 89 times [2021-06-05 04:58:17,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:17,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258082900] [2021-06-05 04:58:17,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:17,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258082900] [2021-06-05 04:58:17,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258082900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:17,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740402449] [2021-06-05 04:58:17,958 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 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 [2021-06-05 04:58:17,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:17,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:17,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:17,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:18,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:18,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740402449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:18,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:18,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:18,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547534376] [2021-06-05 04:58:18,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:18,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:18,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:18,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:18,082 INFO L87 Difference]: Start difference. First operand 78 states and 162 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) [2021-06-05 04:58:18,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:18,334 INFO L93 Difference]: Finished difference Result 105 states and 206 transitions. [2021-06-05 04:58:18,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:18,335 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 16 [2021-06-05 04:58:18,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:18,335 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:58:18,335 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 04:58:18,335 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 342.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 04:58:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 80. [2021-06-05 04:58:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:18,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 04:58:18,336 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 04:58:18,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:18,337 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 04:58:18,337 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) [2021-06-05 04:58:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 04:58:18,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:18,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:18,337 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:18,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2304,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:18,537 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:18,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:18,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1537595925, now seen corresponding path program 90 times [2021-06-05 04:58:18,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:18,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388791739] [2021-06-05 04:58:18,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:18,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388791739] [2021-06-05 04:58:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388791739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:18,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032141703] [2021-06-05 04:58:18,792 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 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 [2021-06-05 04:58:18,816 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:18,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:18,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:18,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:19,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:19,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032141703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:19,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:19,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:58:19,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234193771] [2021-06-05 04:58:19,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:19,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:19,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:19,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:19,053 INFO L87 Difference]: Start difference. First operand 80 states and 169 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) [2021-06-05 04:58:19,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:19,284 INFO L93 Difference]: Finished difference Result 107 states and 208 transitions. [2021-06-05 04:58:19,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:19,284 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 16 [2021-06-05 04:58:19,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:19,284 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:58:19,284 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:58:19,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 495.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:58:19,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:58:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2021-06-05 04:58:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 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) [2021-06-05 04:58:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 04:58:19,286 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 04:58:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:19,286 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 04:58:19,286 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) [2021-06-05 04:58:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 04:58:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:19,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:19,286 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:19,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2317 [2021-06-05 04:58:19,502 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:19,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:19,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1710843617, now seen corresponding path program 91 times [2021-06-05 04:58:19,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:19,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289057624] [2021-06-05 04:58:19,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:19,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:19,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:19,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:19,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289057624] [2021-06-05 04:58:19,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289057624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:19,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255385892] [2021-06-05 04:58:19,786 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 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 [2021-06-05 04:58:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:19,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:19,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:20,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255385892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:20,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:20,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:58:20,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412257167] [2021-06-05 04:58:20,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:20,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:20,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:20,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:20,074 INFO L87 Difference]: Start difference. First operand 79 states and 165 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) [2021-06-05 04:58:20,269 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-06-05 04:58:20,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:20,345 INFO L93 Difference]: Finished difference Result 92 states and 184 transitions. [2021-06-05 04:58:20,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:20,345 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 16 [2021-06-05 04:58:20,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:20,345 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:58:20,346 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:58:20,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:58:20,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:58:20,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-06-05 04:58:20,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 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) [2021-06-05 04:58:20,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 04:58:20,347 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 04:58:20,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:20,347 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 04:58:20,347 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) [2021-06-05 04:58:20,347 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 04:58:20,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:20,361 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:20,361 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:20,561 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2351,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:20,561 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:20,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:20,561 INFO L82 PathProgramCache]: Analyzing trace with hash 433756611, now seen corresponding path program 92 times [2021-06-05 04:58:20,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:20,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092571182] [2021-06-05 04:58:20,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:20,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:20,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092571182] [2021-06-05 04:58:20,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092571182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:20,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40146267] [2021-06-05 04:58:20,705 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 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 [2021-06-05 04:58:20,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:20,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:20,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:20,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:20,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40146267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:20,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:20,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:20,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166037001] [2021-06-05 04:58:20,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:20,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:20,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:20,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:20,821 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:20,977 INFO L93 Difference]: Finished difference Result 107 states and 210 transitions. [2021-06-05 04:58:20,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:20,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:20,978 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:58:20,978 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:58:20,978 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:58:20,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-06-05 04:58:20,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:20,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-06-05 04:58:20,979 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-06-05 04:58:20,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:20,979 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-06-05 04:58:20,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:20,979 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-06-05 04:58:20,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:20,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:20,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:21,179 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2385,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:21,180 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash 2125341247, now seen corresponding path program 93 times [2021-06-05 04:58:21,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:21,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602947651] [2021-06-05 04:58:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:21,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602947651] [2021-06-05 04:58:21,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602947651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:21,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638621510] [2021-06-05 04:58:21,372 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 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 [2021-06-05 04:58:21,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:21,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:21,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:21,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:21,495 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:21,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638621510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:21,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:21,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:21,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262003451] [2021-06-05 04:58:21,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:21,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:21,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:21,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:21,496 INFO L87 Difference]: Start difference. First operand 80 states and 170 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:21,645 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 04:58:21,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:21,645 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:21,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:21,646 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:58:21,646 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:58:21,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 279.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:21,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:58:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 79. [2021-06-05 04:58:21,647 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) [2021-06-05 04:58:21,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 04:58:21,647 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-06-05 04:58:21,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:21,647 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 04:58:21,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 04:58:21,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:21,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:21,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:21,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:21,848 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:21,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:21,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1996378357, now seen corresponding path program 94 times [2021-06-05 04:58:21,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:21,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716957059] [2021-06-05 04:58:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:22,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:22,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716957059] [2021-06-05 04:58:22,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716957059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:22,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076541098] [2021-06-05 04:58:22,041 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:58:22,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:22,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:22,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:22,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:22,218 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:22,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076541098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:22,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:22,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:22,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694897440] [2021-06-05 04:58:22,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:22,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:22,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:22,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:22,219 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:22,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:22,363 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 04:58:22,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:22,364 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:22,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:22,364 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:58:22,364 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:58:22,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 295.1ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:22,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:58:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 04:58:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 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) [2021-06-05 04:58:22,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 04:58:22,365 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 04:58:22,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:22,365 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 04:58:22,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:22,365 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 04:58:22,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:22,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:22,365 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:22,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2410 [2021-06-05 04:58:22,566 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:22,566 INFO L82 PathProgramCache]: Analyzing trace with hash -920667201, now seen corresponding path program 95 times [2021-06-05 04:58:22,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:22,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011303508] [2021-06-05 04:58:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:22,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:22,889 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:22,889 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:22,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011303508] [2021-06-05 04:58:22,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011303508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:22,889 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809126483] [2021-06-05 04:58:22,889 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 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 [2021-06-05 04:58:22,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:22,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:22,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:22,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:23,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:23,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809126483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:23,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:23,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:23,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891313394] [2021-06-05 04:58:23,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:23,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:23,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:23,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:23,025 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:23,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:23,166 INFO L93 Difference]: Finished difference Result 93 states and 185 transitions. [2021-06-05 04:58:23,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:23,166 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2021-06-05 04:58:23,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:23,167 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:58:23,167 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 04:58:23,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 376.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 04:58:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2021-06-05 04:58:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 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) [2021-06-05 04:58:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 04:58:23,168 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 04:58:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:23,168 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 04:58:23,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:23,168 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 04:58:23,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:23,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:23,168 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:23,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2426,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:23,369 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:23,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:23,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1178102735, now seen corresponding path program 96 times [2021-06-05 04:58:23,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:23,369 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608377655] [2021-06-05 04:58:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:23,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:23,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:23,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:23,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608377655] [2021-06-05 04:58:23,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608377655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:23,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851690884] [2021-06-05 04:58:23,558 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 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 [2021-06-05 04:58:23,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:58:23,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:23,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:23,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:23,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851690884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:23,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:23,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:23,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427498426] [2021-06-05 04:58:23,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:23,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:23,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:23,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:23,720 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:23,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:23,857 INFO L93 Difference]: Finished difference Result 100 states and 200 transitions. [2021-06-05 04:58:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:23,857 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:23,857 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:58:23,857 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:58:23,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 285.4ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:23,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:58:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-06-05 04:58:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:23,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-06-05 04:58:23,859 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-06-05 04:58:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:23,859 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-06-05 04:58:23,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:23,859 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-06-05 04:58:23,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:23,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:23,859 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:24,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2441 [2021-06-05 04:58:24,075 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:24,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:24,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1418548883, now seen corresponding path program 97 times [2021-06-05 04:58:24,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:24,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398782035] [2021-06-05 04:58:24,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:24,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:24,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:24,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398782035] [2021-06-05 04:58:24,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398782035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:24,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836011065] [2021-06-05 04:58:24,264 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 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 [2021-06-05 04:58:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:24,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:24,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:24,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836011065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:24,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:24,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 04:58:24,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508231739] [2021-06-05 04:58:24,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:24,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:24,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:24,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:24,443 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-06-05 04:58:24,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:24,626 INFO L93 Difference]: Finished difference Result 104 states and 208 transitions. [2021-06-05 04:58:24,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:24,626 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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 16 [2021-06-05 04:58:24,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:24,627 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:58:24,627 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:58:24,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 325.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:58:24,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 82. [2021-06-05 04:58:24,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 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) [2021-06-05 04:58:24,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-06-05 04:58:24,628 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-06-05 04:58:24,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:24,628 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-06-05 04:58:24,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 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) [2021-06-05 04:58:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-06-05 04:58:24,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:24,628 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:24,628 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:24,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2474 [2021-06-05 04:58:24,829 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:24,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:24,829 INFO L82 PathProgramCache]: Analyzing trace with hash -2119041871, now seen corresponding path program 98 times [2021-06-05 04:58:24,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:24,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988483988] [2021-06-05 04:58:24,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:24,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:24,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988483988] [2021-06-05 04:58:24,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988483988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:24,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254881593] [2021-06-05 04:58:24,977 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 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 [2021-06-05 04:58:25,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:25,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:25,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:25,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:25,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254881593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:25,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:25,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:25,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997428284] [2021-06-05 04:58:25,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:25,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:25,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:25,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:25,100 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:25,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:25,258 INFO L93 Difference]: Finished difference Result 116 states and 227 transitions. [2021-06-05 04:58:25,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:25,258 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:25,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:25,258 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:58:25,258 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:58:25,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:25,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:58:25,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 83. [2021-06-05 04:58:25,259 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) [2021-06-05 04:58:25,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 04:58:25,259 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 04:58:25,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:25,260 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 04:58:25,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 04:58:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:25,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:25,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:25,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2495,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:25,476 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:25,477 INFO L82 PathProgramCache]: Analyzing trace with hash -427457235, now seen corresponding path program 99 times [2021-06-05 04:58:25,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:25,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855469811] [2021-06-05 04:58:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:25,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:25,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855469811] [2021-06-05 04:58:25,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855469811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:25,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127018405] [2021-06-05 04:58:25,639 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 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 [2021-06-05 04:58:25,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:25,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:25,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:25,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:25,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127018405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:25,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:25,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:25,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618064459] [2021-06-05 04:58:25,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:25,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:25,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:25,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:25,760 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:25,926 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-05 04:58:25,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:25,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2021-06-05 04:58:25,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:25,926 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:58:25,926 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:58:25,926 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 255.6ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:58:25,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 80. [2021-06-05 04:58:25,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 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) [2021-06-05 04:58:25,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 04:58:25,927 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 04:58:25,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:25,927 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 04:58:25,927 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:25,928 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 04:58:25,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:25,928 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:25,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:26,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2510 [2021-06-05 04:58:26,128 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:26,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:26,129 INFO L82 PathProgramCache]: Analyzing trace with hash -830803561, now seen corresponding path program 100 times [2021-06-05 04:58:26,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:26,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066389347] [2021-06-05 04:58:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:26,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:26,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:26,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:26,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066389347] [2021-06-05 04:58:26,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066389347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:26,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707564037] [2021-06-05 04:58:26,333 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 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 [2021-06-05 04:58:26,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:26,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:26,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:26,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:26,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707564037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:26,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:26,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:26,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858810300] [2021-06-05 04:58:26,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:26,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:26,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:26,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:26,485 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:26,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:26,649 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 04:58:26,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:26,649 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:26,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:26,650 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:58:26,650 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:58:26,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:26,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:58:26,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-06-05 04:58:26,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:26,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 04:58:26,666 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 04:58:26,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:26,666 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 04:58:26,666 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 04:58:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:26,666 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:26,666 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:26,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2525 [2021-06-05 04:58:26,885 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:26,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:26,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1531296549, now seen corresponding path program 101 times [2021-06-05 04:58:26,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:26,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901404273] [2021-06-05 04:58:26,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:27,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:27,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:27,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901404273] [2021-06-05 04:58:27,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901404273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:27,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402701298] [2021-06-05 04:58:27,067 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 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 [2021-06-05 04:58:27,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:27,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:27,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:27,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:27,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402701298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:27,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:27,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:27,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092888978] [2021-06-05 04:58:27,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:27,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:27,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:27,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:27,198 INFO L87 Difference]: Start difference. First operand 82 states and 171 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) [2021-06-05 04:58:27,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:27,418 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 04:58:27,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:27,418 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 16 [2021-06-05 04:58:27,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:27,419 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:58:27,419 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:58:27,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 341.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:27,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:58:27,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-06-05 04:58:27,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 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) [2021-06-05 04:58:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 04:58:27,420 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 04:58:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:27,420 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 04:58:27,420 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) [2021-06-05 04:58:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 04:58:27,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:27,420 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:27,420 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:27,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2549 [2021-06-05 04:58:27,621 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:27,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:27,621 INFO L82 PathProgramCache]: Analyzing trace with hash 160288087, now seen corresponding path program 102 times [2021-06-05 04:58:27,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:27,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837788850] [2021-06-05 04:58:27,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:27,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837788850] [2021-06-05 04:58:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837788850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558884522] [2021-06-05 04:58:27,836 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 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 [2021-06-05 04:58:27,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:28,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558884522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:28,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:28,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 04:58:28,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447212001] [2021-06-05 04:58:28,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:28,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:28,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:28,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:28,277 INFO L87 Difference]: Start difference. First operand 83 states and 175 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) [2021-06-05 04:58:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:28,448 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 04:58:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:28,449 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 16 [2021-06-05 04:58:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:28,449 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:58:28,449 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:58:28,449 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:58:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-06-05 04:58:28,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 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) [2021-06-05 04:58:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 04:58:28,450 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 04:58:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:28,450 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 04:58:28,450 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) [2021-06-05 04:58:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 04:58:28,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:28,451 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:28,451 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:28,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2568 [2021-06-05 04:58:28,661 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:28,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:28,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2066526351, now seen corresponding path program 103 times [2021-06-05 04:58:28,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:28,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937822145] [2021-06-05 04:58:28,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:28,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:28,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:28,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937822145] [2021-06-05 04:58:28,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937822145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:28,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99974828] [2021-06-05 04:58:28,922 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 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 [2021-06-05 04:58:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:28,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:28,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:29,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99974828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:29,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:29,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 04:58:29,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64607142] [2021-06-05 04:58:29,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:29,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:29,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:29,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:29,186 INFO L87 Difference]: Start difference. First operand 81 states and 168 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) [2021-06-05 04:58:29,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:29,375 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 04:58:29,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:29,376 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 16 [2021-06-05 04:58:29,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:29,376 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:58:29,376 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:58:29,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 395.6ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:58:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 04:58:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 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) [2021-06-05 04:58:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 04:58:29,377 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 04:58:29,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:29,377 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 04:58:29,377 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) [2021-06-05 04:58:29,377 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 04:58:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:29,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:29,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:29,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2695,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:29,594 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:29,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:29,594 INFO L82 PathProgramCache]: Analyzing trace with hash -374941715, now seen corresponding path program 104 times [2021-06-05 04:58:29,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:29,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212049541] [2021-06-05 04:58:29,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:29,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:29,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212049541] [2021-06-05 04:58:29,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212049541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:29,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629651718] [2021-06-05 04:58:29,732 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 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 [2021-06-05 04:58:29,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:29,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629651718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:29,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:29,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:29,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947547653] [2021-06-05 04:58:29,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:29,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:29,856 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:30,018 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-06-05 04:58:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:30,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:30,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:30,018 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:58:30,018 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:58:30,018 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 242.1ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:30,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:58:30,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-06-05 04:58:30,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:30,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 04:58:30,019 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 04:58:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:30,020 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 04:58:30,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 04:58:30,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:30,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:30,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:30,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2729,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:30,220 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:30,221 INFO L82 PathProgramCache]: Analyzing trace with hash -201694023, now seen corresponding path program 105 times [2021-06-05 04:58:30,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:30,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037720728] [2021-06-05 04:58:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:30,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037720728] [2021-06-05 04:58:30,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037720728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:30,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055096094] [2021-06-05 04:58:30,372 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 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 [2021-06-05 04:58:30,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:30,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:30,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:30,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055096094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:30,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:30,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:30,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54388322] [2021-06-05 04:58:30,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:30,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:30,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:30,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:30,493 INFO L87 Difference]: Start difference. First operand 82 states and 171 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:30,649 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 04:58:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2021-06-05 04:58:30,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:30,650 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:58:30,650 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:58:30,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 249.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:30,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:58:30,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2021-06-05 04:58:30,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 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) [2021-06-05 04:58:30,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 04:58:30,651 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 04:58:30,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:30,651 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 04:58:30,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 04:58:30,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:30,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:30,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:30,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2740,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:30,851 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:30,852 INFO L82 PathProgramCache]: Analyzing trace with hash 209432237, now seen corresponding path program 106 times [2021-06-05 04:58:30,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:30,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270244608] [2021-06-05 04:58:30,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:31,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270244608] [2021-06-05 04:58:31,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270244608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:31,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250368910] [2021-06-05 04:58:31,022 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 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 [2021-06-05 04:58:31,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:31,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:31,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:31,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:31,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250368910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:31,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:31,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:31,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562922097] [2021-06-05 04:58:31,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:31,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:31,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:31,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:31,179 INFO L87 Difference]: Start difference. First operand 79 states and 164 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) [2021-06-05 04:58:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:31,327 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 04:58:31,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:31,327 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 16 [2021-06-05 04:58:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:31,327 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:58:31,327 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:58:31,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 271.3ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:58:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 82. [2021-06-05 04:58:31,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:31,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 04:58:31,328 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 04:58:31,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:31,329 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 04:58:31,329 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) [2021-06-05 04:58:31,329 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 04:58:31,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:31,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:31,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:31,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2755 [2021-06-05 04:58:31,537 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:31,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:31,537 INFO L82 PathProgramCache]: Analyzing trace with hash -491060751, now seen corresponding path program 107 times [2021-06-05 04:58:31,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:31,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830721584] [2021-06-05 04:58:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:31,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:31,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830721584] [2021-06-05 04:58:31,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830721584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:31,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966353859] [2021-06-05 04:58:31,760 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 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 [2021-06-05 04:58:31,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:31,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:31,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:31,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:32,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:32,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966353859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:32,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:32,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:58:32,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128986375] [2021-06-05 04:58:32,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:32,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:32,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:32,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:32,166 INFO L87 Difference]: Start difference. First operand 82 states and 171 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) [2021-06-05 04:58:32,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:32,352 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 04:58:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:32,352 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 16 [2021-06-05 04:58:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:32,352 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:58:32,352 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:58:32,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:58:32,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:58:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 83. [2021-06-05 04:58:32,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 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) [2021-06-05 04:58:32,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 04:58:32,354 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 04:58:32,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:32,354 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 04:58:32,354 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) [2021-06-05 04:58:32,354 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 04:58:32,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:32,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:32,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:32,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2781,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:32,557 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:32,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1200523885, now seen corresponding path program 108 times [2021-06-05 04:58:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:32,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970376496] [2021-06-05 04:58:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:32,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:32,770 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:32,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970376496] [2021-06-05 04:58:32,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970376496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:32,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046066250] [2021-06-05 04:58:32,770 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 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 [2021-06-05 04:58:32,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:32,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:32,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:32,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046066250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:32,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:32,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 04:58:32,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486585689] [2021-06-05 04:58:32,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:32,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:32,909 INFO L87 Difference]: Start difference. First operand 83 states and 175 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:58:33,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:33,134 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-06-05 04:58:33,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:33,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 [2021-06-05 04:58:33,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:33,135 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:58:33,135 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:58:33,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:33,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:58:33,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 81. [2021-06-05 04:58:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1) internal successors, (168), 80 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) [2021-06-05 04:58:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 168 transitions. [2021-06-05 04:58:33,136 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 168 transitions. Word has length 16 [2021-06-05 04:58:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:33,136 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 168 transitions. [2021-06-05 04:58:33,136 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:58:33,136 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 168 transitions. [2021-06-05 04:58:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:33,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:33,136 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:33,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2890,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:33,345 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:33,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1026290553, now seen corresponding path program 109 times [2021-06-05 04:58:33,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:33,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719620762] [2021-06-05 04:58:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:33,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:33,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719620762] [2021-06-05 04:58:33,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719620762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:33,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158339339] [2021-06-05 04:58:33,546 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 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 [2021-06-05 04:58:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:33,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:33,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:33,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158339339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:33,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:33,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:33,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449781575] [2021-06-05 04:58:33,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:33,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:33,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:33,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:33,688 INFO L87 Difference]: Start difference. First operand 81 states and 168 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) [2021-06-05 04:58:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:33,942 INFO L93 Difference]: Finished difference Result 109 states and 214 transitions. [2021-06-05 04:58:33,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:33,942 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 16 [2021-06-05 04:58:33,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:33,942 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:58:33,943 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:58:33,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:58:33,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 83. [2021-06-05 04:58:33,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.1341463414634148) internal successors, (175), 82 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) [2021-06-05 04:58:33,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 175 transitions. [2021-06-05 04:58:33,944 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 175 transitions. Word has length 16 [2021-06-05 04:58:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:33,944 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 175 transitions. [2021-06-05 04:58:33,944 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) [2021-06-05 04:58:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 175 transitions. [2021-06-05 04:58:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:33,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:33,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:34,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2905,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:34,153 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:34,153 INFO L82 PathProgramCache]: Analyzing trace with hash 665294083, now seen corresponding path program 110 times [2021-06-05 04:58:34,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:34,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213761257] [2021-06-05 04:58:34,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:34,425 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:34,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:34,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213761257] [2021-06-05 04:58:34,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213761257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:34,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709345108] [2021-06-05 04:58:34,425 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 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 [2021-06-05 04:58:34,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:34,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:34,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:34,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709345108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:34,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:34,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:58:34,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627845867] [2021-06-05 04:58:34,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:34,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:34,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:34,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:34,686 INFO L87 Difference]: Start difference. First operand 83 states and 175 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) [2021-06-05 04:58:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:34,955 INFO L93 Difference]: Finished difference Result 111 states and 216 transitions. [2021-06-05 04:58:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:34,955 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 16 [2021-06-05 04:58:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:34,956 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:58:34,956 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:58:34,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 505.4ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:58:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:58:34,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 82. [2021-06-05 04:58:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.111111111111111) internal successors, (171), 81 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 171 transitions. [2021-06-05 04:58:34,957 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 171 transitions. Word has length 16 [2021-06-05 04:58:34,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:34,957 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 171 transitions. [2021-06-05 04:58:34,957 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) [2021-06-05 04:58:34,957 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 171 transitions. [2021-06-05 04:58:34,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:34,957 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:34,957 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:35,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2918,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:35,158 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:35,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:35,158 INFO L82 PathProgramCache]: Analyzing trace with hash 838541775, now seen corresponding path program 111 times [2021-06-05 04:58:35,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:35,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035784309] [2021-06-05 04:58:35,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:35,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:35,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:35,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035784309] [2021-06-05 04:58:35,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035784309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:35,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616883056] [2021-06-05 04:58:35,441 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 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 [2021-06-05 04:58:35,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:58:35,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:35,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:35,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:35,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:35,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616883056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:35,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:35,741 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-05 04:58:35,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866164728] [2021-06-05 04:58:35,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:35,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:35,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:35,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:35,741 INFO L87 Difference]: Start difference. First operand 82 states and 171 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) [2021-06-05 04:58:35,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:35,965 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 04:58:35,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:35,965 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 16 [2021-06-05 04:58:35,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:35,966 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:58:35,966 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:58:35,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:58:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:58:35,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2021-06-05 04:58:35,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 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) [2021-06-05 04:58:35,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 166 transitions. [2021-06-05 04:58:35,967 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 166 transitions. Word has length 16 [2021-06-05 04:58:35,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:35,967 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 166 transitions. [2021-06-05 04:58:35,967 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) [2021-06-05 04:58:35,967 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 166 transitions. [2021-06-05 04:58:35,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:35,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:35,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:36,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2952,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:36,181 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash -438545231, now seen corresponding path program 112 times [2021-06-05 04:58:36,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:36,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824976662] [2021-06-05 04:58:36,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:36,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:36,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:36,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824976662] [2021-06-05 04:58:36,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824976662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:36,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553060989] [2021-06-05 04:58:36,336 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 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 [2021-06-05 04:58:36,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:36,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:36,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:36,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:36,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553060989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:36,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:36,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:36,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15149097] [2021-06-05 04:58:36,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:36,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:36,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:36,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:36,467 INFO L87 Difference]: Start difference. First operand 80 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:36,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:36,670 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-06-05 04:58:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:36,670 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:36,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:36,671 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:58:36,671 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:58:36,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:36,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:58:36,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2021-06-05 04:58:36,672 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) [2021-06-05 04:58:36,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 176 transitions. [2021-06-05 04:58:36,672 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 176 transitions. Word has length 16 [2021-06-05 04:58:36,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:36,672 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 176 transitions. [2021-06-05 04:58:36,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:36,672 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 176 transitions. [2021-06-05 04:58:36,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:36,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:36,672 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:36,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2986 [2021-06-05 04:58:36,893 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:36,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:36,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1253039405, now seen corresponding path program 113 times [2021-06-05 04:58:36,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:36,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49347780] [2021-06-05 04:58:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:36,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:37,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49347780] [2021-06-05 04:58:37,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49347780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:37,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242753042] [2021-06-05 04:58:37,092 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 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 [2021-06-05 04:58:37,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:37,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:37,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:37,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:37,222 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:37,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242753042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:37,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:37,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:37,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531079532] [2021-06-05 04:58:37,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:37,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:37,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:37,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:37,223 INFO L87 Difference]: Start difference. First operand 83 states and 176 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:37,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:37,394 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 04:58:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:37,394 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:37,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:37,395 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:58:37,395 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:58:37,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 303.9ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:58:37,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2021-06-05 04:58:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.123456790123457) internal successors, (172), 81 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) [2021-06-05 04:58:37,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 172 transitions. [2021-06-05 04:58:37,396 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 172 transitions. Word has length 16 [2021-06-05 04:58:37,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:37,396 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 172 transitions. [2021-06-05 04:58:37,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:37,396 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 172 transitions. [2021-06-05 04:58:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:37,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:37,396 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:37,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2996,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:37,605 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1426287097, now seen corresponding path program 114 times [2021-06-05 04:58:37,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:37,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430961171] [2021-06-05 04:58:37,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:37,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:37,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430961171] [2021-06-05 04:58:37,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430961171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:37,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531776082] [2021-06-05 04:58:37,781 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 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 [2021-06-05 04:58:37,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 04:58:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:37,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:37,910 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:37,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531776082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:37,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:37,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:37,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770453432] [2021-06-05 04:58:37,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:37,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:37,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:37,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:37,910 INFO L87 Difference]: Start difference. First operand 82 states and 172 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:38,080 INFO L93 Difference]: Finished difference Result 100 states and 199 transitions. [2021-06-05 04:58:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:38,081 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:38,081 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:58:38,081 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:58:38,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 267.1ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:38,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:58:38,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 81. [2021-06-05 04:58:38,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.1125) internal successors, (169), 80 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:38,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 169 transitions. [2021-06-05 04:58:38,082 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 169 transitions. Word has length 16 [2021-06-05 04:58:38,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:38,082 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 169 transitions. [2021-06-05 04:58:38,082 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:38,082 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 169 transitions. [2021-06-05 04:58:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:38,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:38,082 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:38,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3011 [2021-06-05 04:58:38,290 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:38,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:38,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1792969043, now seen corresponding path program 115 times [2021-06-05 04:58:38,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:38,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626475442] [2021-06-05 04:58:38,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:38,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:38,584 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:38,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:38,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626475442] [2021-06-05 04:58:38,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626475442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:38,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573565538] [2021-06-05 04:58:38,584 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 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 [2021-06-05 04:58:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:38,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:38,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:38,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573565538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:38,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:38,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:38,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821898369] [2021-06-05 04:58:38,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:38,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:38,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:38,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:38,726 INFO L87 Difference]: Start difference. First operand 81 states and 169 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:38,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:38,897 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 04:58:38,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:38,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 16 [2021-06-05 04:58:38,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:38,898 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:58:38,898 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:58:38,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 397.5ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:38,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:58:38,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 04:58:38,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 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) [2021-06-05 04:58:38,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 04:58:38,899 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 04:58:38,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:38,899 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 04:58:38,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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) [2021-06-05 04:58:38,899 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 04:58:38,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:38,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:38,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:39,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3027 [2021-06-05 04:58:39,113 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:39,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:39,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1124513725, now seen corresponding path program 116 times [2021-06-05 04:58:39,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:39,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619418228] [2021-06-05 04:58:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:39,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:39,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:39,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619418228] [2021-06-05 04:58:39,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619418228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:39,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92661853] [2021-06-05 04:58:39,321 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 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 [2021-06-05 04:58:39,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:39,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:39,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:39,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:39,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92661853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:39,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:39,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:39,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794905659] [2021-06-05 04:58:39,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:39,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:39,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:39,460 INFO L87 Difference]: Start difference. First operand 78 states and 162 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) [2021-06-05 04:58:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:39,631 INFO L93 Difference]: Finished difference Result 98 states and 196 transitions. [2021-06-05 04:58:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:39,631 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 16 [2021-06-05 04:58:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:39,631 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:58:39,631 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:58:39,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 337.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:39,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:58:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 79. [2021-06-05 04:58:39,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 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) [2021-06-05 04:58:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 04:58:39,633 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 04:58:39,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:39,633 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 04:58:39,633 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) [2021-06-05 04:58:39,633 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 04:58:39,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:39,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:39,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:39,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3039,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:39,849 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:39,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:39,849 INFO L82 PathProgramCache]: Analyzing trace with hash 424020737, now seen corresponding path program 117 times [2021-06-05 04:58:39,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:39,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043880015] [2021-06-05 04:58:39,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:40,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:40,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:40,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043880015] [2021-06-05 04:58:40,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043880015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:40,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484569649] [2021-06-05 04:58:40,016 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 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 [2021-06-05 04:58:40,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:40,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:40,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:40,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:40,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484569649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:40,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:40,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:40,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974472303] [2021-06-05 04:58:40,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:40,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:40,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:40,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:40,139 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:40,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:40,287 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 04:58:40,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:40,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:40,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:40,288 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:58:40,288 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:58:40,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 238.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:40,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:58:40,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 80. [2021-06-05 04:58:40,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:40,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 04:58:40,289 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 04:58:40,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:40,289 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 04:58:40,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:40,289 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 04:58:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:40,289 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:40,289 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:40,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3059,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:40,490 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:40,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:40,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2115605373, now seen corresponding path program 118 times [2021-06-05 04:58:40,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:40,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118594034] [2021-06-05 04:58:40,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:40,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:40,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:40,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118594034] [2021-06-05 04:58:40,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118594034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:40,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809901990] [2021-06-05 04:58:40,635 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:40,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:40,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:40,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809901990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:40,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:40,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:40,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565450640] [2021-06-05 04:58:40,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:40,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:40,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:40,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:40,766 INFO L87 Difference]: Start difference. First operand 80 states and 169 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:40,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:40,915 INFO L93 Difference]: Finished difference Result 101 states and 202 transitions. [2021-06-05 04:58:40,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:40,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:40,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:40,916 INFO L225 Difference]: With dead ends: 101 [2021-06-05 04:58:40,916 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:58:40,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:58:40,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2021-06-05 04:58:40,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.103896103896104) internal successors, (162), 77 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) [2021-06-05 04:58:40,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 162 transitions. [2021-06-05 04:58:40,917 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 162 transitions. Word has length 16 [2021-06-05 04:58:40,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:40,917 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 162 transitions. [2021-06-05 04:58:40,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 162 transitions. [2021-06-05 04:58:40,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:40,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:40,917 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:41,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3080 [2021-06-05 04:58:41,133 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:41,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:41,133 INFO L82 PathProgramCache]: Analyzing trace with hash -111209065, now seen corresponding path program 119 times [2021-06-05 04:58:41,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:41,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140347617] [2021-06-05 04:58:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:41,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:41,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140347617] [2021-06-05 04:58:41,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140347617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:41,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541513782] [2021-06-05 04:58:41,289 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 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 [2021-06-05 04:58:41,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:41,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:41,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:41,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:41,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541513782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:41,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:41,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-05 04:58:41,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959507771] [2021-06-05 04:58:41,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:41,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:41,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:41,423 INFO L87 Difference]: Start difference. First operand 78 states and 162 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) [2021-06-05 04:58:41,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:41,645 INFO L93 Difference]: Finished difference Result 109 states and 213 transitions. [2021-06-05 04:58:41,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:41,646 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 16 [2021-06-05 04:58:41,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:41,646 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:58:41,646 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:58:41,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 324.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:41,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:58:41,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 04:58:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1392405063291138) internal successors, (169), 79 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:41,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 169 transitions. [2021-06-05 04:58:41,647 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 169 transitions. Word has length 16 [2021-06-05 04:58:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:41,647 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 169 transitions. [2021-06-05 04:58:41,647 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) [2021-06-05 04:58:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 169 transitions. [2021-06-05 04:58:41,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:41,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:41,647 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:41,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3101,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:41,848 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:41,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:41,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1580375571, now seen corresponding path program 120 times [2021-06-05 04:58:41,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:41,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370212674] [2021-06-05 04:58:41,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:42,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:42,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370212674] [2021-06-05 04:58:42,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370212674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:42,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992864848] [2021-06-05 04:58:42,022 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 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 [2021-06-05 04:58:42,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:42,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:42,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:42,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:42,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992864848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:42,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:42,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-05 04:58:42,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603807721] [2021-06-05 04:58:42,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:42,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:42,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:42,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:42,276 INFO L87 Difference]: Start difference. First operand 80 states and 169 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) [2021-06-05 04:58:42,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:42,483 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-06-05 04:58:42,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:42,484 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 16 [2021-06-05 04:58:42,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:42,484 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:58:42,484 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:58:42,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:58:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 79. [2021-06-05 04:58:42,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1153846153846154) internal successors, (165), 78 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) [2021-06-05 04:58:42,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 165 transitions. [2021-06-05 04:58:42,485 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 165 transitions. Word has length 16 [2021-06-05 04:58:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:42,485 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 165 transitions. [2021-06-05 04:58:42,485 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) [2021-06-05 04:58:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 165 transitions. [2021-06-05 04:58:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:42,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:42,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:42,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3117,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:42,686 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:42,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:42,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1753623263, now seen corresponding path program 121 times [2021-06-05 04:58:42,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:42,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968080018] [2021-06-05 04:58:42,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:42,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968080018] [2021-06-05 04:58:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968080018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634665907] [2021-06-05 04:58:42,902 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 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 [2021-06-05 04:58:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:42,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:42,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:43,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634665907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:43,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:43,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-05 04:58:43,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960887584] [2021-06-05 04:58:43,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:43,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:43,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:43,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:43,093 INFO L87 Difference]: Start difference. First operand 79 states and 165 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:58:43,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:43,271 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 04:58:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 [2021-06-05 04:58:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:43,272 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:58:43,272 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:58:43,272 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 379.3ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:58:43,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-06-05 04:58:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1052631578947367) internal successors, (160), 76 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) [2021-06-05 04:58:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 160 transitions. [2021-06-05 04:58:43,273 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 160 transitions. Word has length 16 [2021-06-05 04:58:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:43,273 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 160 transitions. [2021-06-05 04:58:43,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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) [2021-06-05 04:58:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 160 transitions. [2021-06-05 04:58:43,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:43,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:43,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:43,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3151 [2021-06-05 04:58:43,474 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:43,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:43,474 INFO L82 PathProgramCache]: Analyzing trace with hash 476536257, now seen corresponding path program 122 times [2021-06-05 04:58:43,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:43,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177686490] [2021-06-05 04:58:43,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:43,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:43,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:43,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177686490] [2021-06-05 04:58:43,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177686490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:43,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008057348] [2021-06-05 04:58:43,630 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 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 [2021-06-05 04:58:43,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:43,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:43,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:43,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:43,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008057348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:43,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:43,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:43,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047728849] [2021-06-05 04:58:43,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:43,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:43,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:43,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:43,756 INFO L87 Difference]: Start difference. First operand 77 states and 160 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:43,942 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-06-05 04:58:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:43,943 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:58:43,943 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:58:43,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 274.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:43,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:58:43,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 80. [2021-06-05 04:58:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.151898734177215) internal successors, (170), 79 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 170 transitions. [2021-06-05 04:58:43,944 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 170 transitions. Word has length 16 [2021-06-05 04:58:43,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:43,944 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 170 transitions. [2021-06-05 04:58:43,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:43,944 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 170 transitions. [2021-06-05 04:58:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:43,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:43,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:44,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3163 [2021-06-05 04:58:44,149 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:44,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:44,149 INFO L82 PathProgramCache]: Analyzing trace with hash -2126846403, now seen corresponding path program 123 times [2021-06-05 04:58:44,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:44,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980389049] [2021-06-05 04:58:44,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:44,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:44,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:44,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980389049] [2021-06-05 04:58:44,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980389049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:44,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659709693] [2021-06-05 04:58:44,415 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 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 [2021-06-05 04:58:44,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:44,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:44,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 04:58:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:44,739 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2021-06-05 04:58:45,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:45,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659709693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:45,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:45,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-06-05 04:58:45,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369010433] [2021-06-05 04:58:45,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 04:58:45,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:45,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 04:58:45,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:45,119 INFO L87 Difference]: Start difference. First operand 80 states and 170 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) [2021-06-05 04:58:45,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:45,442 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 04:58:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:58:45,442 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 16 [2021-06-05 04:58:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:45,443 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:58:45,443 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:58:45,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 776.3ms TimeCoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:58:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:58:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2021-06-05 04:58:45,444 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) [2021-06-05 04:58:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 166 transitions. [2021-06-05 04:58:45,444 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 166 transitions. Word has length 16 [2021-06-05 04:58:45,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:45,444 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 166 transitions. [2021-06-05 04:58:45,444 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) [2021-06-05 04:58:45,444 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 166 transitions. [2021-06-05 04:58:45,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:45,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:45,444 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:45,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3174 [2021-06-05 04:58:45,645 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:45,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:45,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1953598711, now seen corresponding path program 124 times [2021-06-05 04:58:45,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:45,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266658962] [2021-06-05 04:58:45,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:45,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:45,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:45,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266658962] [2021-06-05 04:58:45,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266658962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:45,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259763032] [2021-06-05 04:58:45,817 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 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 [2021-06-05 04:58:45,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:45,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:45,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:45,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:45,951 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:45,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259763032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:45,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:45,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:45,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887022382] [2021-06-05 04:58:45,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:45,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:45,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:45,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:45,952 INFO L87 Difference]: Start difference. First operand 79 states and 166 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:46,120 INFO L93 Difference]: Finished difference Result 100 states and 198 transitions. [2021-06-05 04:58:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:46,120 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:46,120 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:58:46,120 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 04:58:46,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 283.4ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:46,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 04:58:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-06-05 04:58:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.116883116883117) internal successors, (163), 77 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) [2021-06-05 04:58:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 163 transitions. [2021-06-05 04:58:46,122 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 163 transitions. Word has length 16 [2021-06-05 04:58:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:46,122 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 163 transitions. [2021-06-05 04:58:46,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 163 transitions. [2021-06-05 04:58:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:46,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:46,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:46,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-06-05 04:58:46,322 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:46,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:46,323 INFO L82 PathProgramCache]: Analyzing trace with hash -877887555, now seen corresponding path program 125 times [2021-06-05 04:58:46,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:46,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787664994] [2021-06-05 04:58:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:46,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:46,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:46,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787664994] [2021-06-05 04:58:46,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787664994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:46,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505135995] [2021-06-05 04:58:46,545 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 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 [2021-06-05 04:58:46,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:46,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:46,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505135995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:46,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:46,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:46,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215685463] [2021-06-05 04:58:46,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:46,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:46,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:46,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:46,690 INFO L87 Difference]: Start difference. First operand 78 states and 163 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:46,858 INFO L93 Difference]: Finished difference Result 97 states and 192 transitions. [2021-06-05 04:58:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:46,858 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:46,858 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:58:46,858 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:58:46,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 343.8ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:58:46,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 76. [2021-06-05 04:58:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.1066666666666665) internal successors, (158), 75 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) [2021-06-05 04:58:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 158 transitions. [2021-06-05 04:58:46,859 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 158 transitions. Word has length 16 [2021-06-05 04:58:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:46,859 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 158 transitions. [2021-06-05 04:58:46,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 158 transitions. [2021-06-05 04:58:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:46,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:46,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:47,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:47,060 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:47,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:47,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1295060303, now seen corresponding path program 126 times [2021-06-05 04:58:47,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:47,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603984617] [2021-06-05 04:58:47,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:47,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:47,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603984617] [2021-06-05 04:58:47,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603984617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:47,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898156666] [2021-06-05 04:58:47,217 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 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 [2021-06-05 04:58:47,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:47,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:47,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:47,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:47,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:47,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898156666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:47,336 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:47,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:47,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452045707] [2021-06-05 04:58:47,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:47,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:47,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:47,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:47,337 INFO L87 Difference]: Start difference. First operand 76 states and 158 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:47,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:47,620 INFO L93 Difference]: Finished difference Result 132 states and 254 transitions. [2021-06-05 04:58:47,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:47,621 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:47,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:47,621 INFO L225 Difference]: With dead ends: 132 [2021-06-05 04:58:47,621 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:58:47,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 368.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:47,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:58:47,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2021-06-05 04:58:47,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.1645569620253164) internal successors, (171), 79 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:47,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 171 transitions. [2021-06-05 04:58:47,622 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 171 transitions. Word has length 16 [2021-06-05 04:58:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:47,622 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 171 transitions. [2021-06-05 04:58:47,622 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 171 transitions. [2021-06-05 04:58:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:47,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:47,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:47,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-06-05 04:58:47,823 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:47,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:47,823 INFO L82 PathProgramCache]: Analyzing trace with hash 396524333, now seen corresponding path program 127 times [2021-06-05 04:58:47,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:47,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328217092] [2021-06-05 04:58:47,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:48,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:48,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328217092] [2021-06-05 04:58:48,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328217092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:48,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347579414] [2021-06-05 04:58:48,005 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 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 [2021-06-05 04:58:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:48,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347579414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:48,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:48,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:48,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687430728] [2021-06-05 04:58:48,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:48,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:48,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:48,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:48,136 INFO L87 Difference]: Start difference. First operand 80 states and 171 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:48,411 INFO L93 Difference]: Finished difference Result 134 states and 256 transitions. [2021-06-05 04:58:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:48,411 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:48,412 INFO L225 Difference]: With dead ends: 134 [2021-06-05 04:58:48,412 INFO L226 Difference]: Without dead ends: 127 [2021-06-05 04:58:48,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 390.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:48,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-06-05 04:58:48,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 79. [2021-06-05 04:58:48,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.141025641025641) internal successors, (167), 78 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 167 transitions. [2021-06-05 04:58:48,413 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 167 transitions. Word has length 16 [2021-06-05 04:58:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:48,413 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 167 transitions. [2021-06-05 04:58:48,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 167 transitions. [2021-06-05 04:58:48,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:48,413 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:48,413 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:48,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:48,614 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:48,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:48,614 INFO L82 PathProgramCache]: Analyzing trace with hash 569772025, now seen corresponding path program 128 times [2021-06-05 04:58:48,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:48,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050873696] [2021-06-05 04:58:48,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:48,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:48,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:48,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050873696] [2021-06-05 04:58:48,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050873696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:48,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136919370] [2021-06-05 04:58:48,806 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 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 [2021-06-05 04:58:48,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:48,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:48,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:48,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:48,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136919370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:48,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:48,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:48,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140733934] [2021-06-05 04:58:48,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:48,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:48,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:48,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:48,940 INFO L87 Difference]: Start difference. First operand 79 states and 167 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:49,186 INFO L93 Difference]: Finished difference Result 121 states and 235 transitions. [2021-06-05 04:58:49,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:49,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:49,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:49,186 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:58:49,186 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:58:49,187 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:49,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:58:49,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2021-06-05 04:58:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.1298701298701297) internal successors, (164), 77 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) [2021-06-05 04:58:49,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 164 transitions. [2021-06-05 04:58:49,188 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 164 transitions. Word has length 16 [2021-06-05 04:58:49,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:49,188 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 164 transitions. [2021-06-05 04:58:49,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:49,188 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 164 transitions. [2021-06-05 04:58:49,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:49,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:49,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:49,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-06-05 04:58:49,404 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:49,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1645483181, now seen corresponding path program 129 times [2021-06-05 04:58:49,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:49,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877148989] [2021-06-05 04:58:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:49,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:49,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:49,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877148989] [2021-06-05 04:58:49,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877148989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:49,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739922506] [2021-06-05 04:58:49,555 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 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 [2021-06-05 04:58:49,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:58:49,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:49,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:49,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:49,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739922506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:49,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:49,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:49,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206275366] [2021-06-05 04:58:49,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:49,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:49,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:49,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:49,703 INFO L87 Difference]: Start difference. First operand 78 states and 164 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:49,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:49,990 INFO L93 Difference]: Finished difference Result 120 states and 232 transitions. [2021-06-05 04:58:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:49,990 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:58:49,990 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:58:49,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 382.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:58:49,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-06-05 04:58:49,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.1184210526315788) internal successors, (161), 76 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:49,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 161 transitions. [2021-06-05 04:58:49,992 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 161 transitions. Word has length 16 [2021-06-05 04:58:49,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:49,992 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 161 transitions. [2021-06-05 04:58:49,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 161 transitions. [2021-06-05 04:58:49,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-05 04:58:49,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:49,992 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:50,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:50,205 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:50,205 INFO L82 PathProgramCache]: Analyzing trace with hash 126444383, now seen corresponding path program 130 times [2021-06-05 04:58:50,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:50,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742144569] [2021-06-05 04:58:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:50,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742144569] [2021-06-05 04:58:50,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742144569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:50,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302548558] [2021-06-05 04:58:50,367 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 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 [2021-06-05 04:58:50,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:50,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:50,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 04:58:50,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:50,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302548558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:50,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:50,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 04:58:50,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382361006] [2021-06-05 04:58:50,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 04:58:50,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:50,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 04:58:50,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 04:58:50,500 INFO L87 Difference]: Start difference. First operand 77 states and 161 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:50,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:50,882 INFO L93 Difference]: Finished difference Result 117 states and 226 transitions. [2021-06-05 04:58:50,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:58:50,882 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have 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 [2021-06-05 04:58:50,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:50,882 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:58:50,882 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:58:50,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:50,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:58:50,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-06-05 04:58:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.1025641025641026) internal successors, (164), 78 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) [2021-06-05 04:58:50,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 164 transitions. [2021-06-05 04:58:50,883 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 164 transitions. Word has length 16 [2021-06-05 04:58:50,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:50,884 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 164 transitions. [2021-06-05 04:58:50,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:58:50,884 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 164 transitions. [2021-06-05 04:58:50,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:50,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:50,884 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:51,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:51,084 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:51,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:51,085 INFO L82 PathProgramCache]: Analyzing trace with hash -662723303, now seen corresponding path program 131 times [2021-06-05 04:58:51,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:51,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127229810] [2021-06-05 04:58:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:51,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:51,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:51,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127229810] [2021-06-05 04:58:51,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127229810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:51,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110855552] [2021-06-05 04:58:51,171 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 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 [2021-06-05 04:58:51,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:51,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:51,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:51,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:51,302 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:51,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110855552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:51,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:51,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:58:51,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001271223] [2021-06-05 04:58:51,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:51,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:51,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:51,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:51,303 INFO L87 Difference]: Start difference. First operand 79 states and 164 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:58:51,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:51,584 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 04:58:51,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:58:51,585 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 04:58:51,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:51,585 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:58:51,585 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:58:51,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 314.1ms TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:58:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:58:51,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2021-06-05 04:58:51,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.1095890410958904) internal successors, (154), 73 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) [2021-06-05 04:58:51,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 154 transitions. [2021-06-05 04:58:51,586 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 154 transitions. Word has length 17 [2021-06-05 04:58:51,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:51,586 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 154 transitions. [2021-06-05 04:58:51,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:58:51,586 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 154 transitions. [2021-06-05 04:58:51,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:51,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:51,586 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:51,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:51,787 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:51,787 INFO L82 PathProgramCache]: Analyzing trace with hash 17715690, now seen corresponding path program 132 times [2021-06-05 04:58:51,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:51,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610025957] [2021-06-05 04:58:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:51,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:51,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610025957] [2021-06-05 04:58:51,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610025957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:51,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115637257] [2021-06-05 04:58:51,882 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 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 [2021-06-05 04:58:51,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:51,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:51,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:51,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:51,971 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 25 treesize of output 19 [2021-06-05 04:58:51,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,976 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 [2021-06-05 04:58:51,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:51,986 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:51,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:58:51,999 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:58:52,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:52,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115637257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:52,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:52,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:58:52,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613354423] [2021-06-05 04:58:52,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:52,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:52,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:52,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:52,028 INFO L87 Difference]: Start difference. First operand 74 states and 154 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) [2021-06-05 04:58:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:52,178 INFO L93 Difference]: Finished difference Result 111 states and 221 transitions. [2021-06-05 04:58:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:58:52,178 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 [2021-06-05 04:58:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:52,178 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:58:52,178 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:58:52,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 207.1ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:58:52,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 75. [2021-06-05 04:58:52,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.1216216216216215) internal successors, (157), 74 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) [2021-06-05 04:58:52,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 157 transitions. [2021-06-05 04:58:52,179 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 157 transitions. Word has length 17 [2021-06-05 04:58:52,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:52,179 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 157 transitions. [2021-06-05 04:58:52,179 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) [2021-06-05 04:58:52,179 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 157 transitions. [2021-06-05 04:58:52,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:52,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:52,180 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:52,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:52,380 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:52,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:52,380 INFO L82 PathProgramCache]: Analyzing trace with hash -652368167, now seen corresponding path program 133 times [2021-06-05 04:58:52,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:52,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238832634] [2021-06-05 04:58:52,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:52,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:52,470 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:52,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:52,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238832634] [2021-06-05 04:58:52,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238832634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:52,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342966711] [2021-06-05 04:58:52,470 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 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 [2021-06-05 04:58:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:52,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:52,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342966711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:52,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:52,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:58:52,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854122267] [2021-06-05 04:58:52,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:52,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:52,606 INFO L87 Difference]: Start difference. First operand 75 states and 157 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) [2021-06-05 04:58:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:52,846 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 04:58:52,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:58:52,846 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 [2021-06-05 04:58:52,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:52,846 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:58:52,846 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:58:52,847 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 303.2ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:58:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:58:52,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-05 04:58:52,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 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) [2021-06-05 04:58:52,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-06-05 04:58:52,848 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-06-05 04:58:52,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:52,848 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-06-05 04:58:52,848 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) [2021-06-05 04:58:52,848 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-06-05 04:58:52,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:52,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:52,848 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:53,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:53,049 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:53,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:53,049 INFO L82 PathProgramCache]: Analyzing trace with hash 878558040, now seen corresponding path program 134 times [2021-06-05 04:58:53,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:53,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800569995] [2021-06-05 04:58:53,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:53,133 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:53,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800569995] [2021-06-05 04:58:53,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800569995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:53,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721035127] [2021-06-05 04:58:53,133 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 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 [2021-06-05 04:58:53,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:53,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:53,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:53,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:53,225 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 [2021-06-05 04:58:53,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,228 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 25 treesize of output 19 [2021-06-05 04:58:53,229 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:53,236 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:53,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,237 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:58:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:53,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721035127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:53,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:53,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:58:53,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681069290] [2021-06-05 04:58:53,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:53,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:53,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:53,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:53,261 INFO L87 Difference]: Start difference. First operand 75 states and 156 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:58:53,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:53,398 INFO L93 Difference]: Finished difference Result 106 states and 215 transitions. [2021-06-05 04:58:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:58:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:58:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:53,399 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:58:53,399 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 04:58:53,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 175.7ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:53,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 04:58:53,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 75. [2021-06-05 04:58:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.108108108108108) internal successors, (156), 74 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) [2021-06-05 04:58:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 156 transitions. [2021-06-05 04:58:53,400 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 156 transitions. Word has length 17 [2021-06-05 04:58:53,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:53,400 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 156 transitions. [2021-06-05 04:58:53,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:58:53,400 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 156 transitions. [2021-06-05 04:58:53,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:53,400 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:53,400 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:53,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3362 [2021-06-05 04:58:53,601 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:53,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:53,601 INFO L82 PathProgramCache]: Analyzing trace with hash 483735837, now seen corresponding path program 135 times [2021-06-05 04:58:53,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:53,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932507256] [2021-06-05 04:58:53,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:53,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:53,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932507256] [2021-06-05 04:58:53,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932507256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:53,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767225555] [2021-06-05 04:58:53,698 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 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 [2021-06-05 04:58:53,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:58:53,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:53,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:53,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:53,845 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 [2021-06-05 04:58:53,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,849 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 17 treesize of output 13 [2021-06-05 04:58:53,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,852 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 [2021-06-05 04:58:53,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:53,856 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,858 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 17 treesize of output 13 [2021-06-05 04:58:53,859 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,861 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 [2021-06-05 04:58:53,862 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:53,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:53,886 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:53,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:58:53,887 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:58:53,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:53,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767225555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:53,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:53,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:58:53,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799419600] [2021-06-05 04:58:53,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:53,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:53,929 INFO L87 Difference]: Start difference. First operand 75 states and 156 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) [2021-06-05 04:58:54,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:54,207 INFO L93 Difference]: Finished difference Result 111 states and 215 transitions. [2021-06-05 04:58:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:58:54,207 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 [2021-06-05 04:58:54,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:54,207 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:58:54,207 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:58:54,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 345.0ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:58:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:58:54,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 75. [2021-06-05 04:58:54,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 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) [2021-06-05 04:58:54,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 04:58:54,208 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 04:58:54,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:54,209 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 04:58:54,209 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) [2021-06-05 04:58:54,209 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 04:58:54,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:54,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:54,209 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:54,409 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:54,409 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:54,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1225857214, now seen corresponding path program 136 times [2021-06-05 04:58:54,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:54,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423209182] [2021-06-05 04:58:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:54,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:54,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423209182] [2021-06-05 04:58:54,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423209182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:54,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11611978] [2021-06-05 04:58:54,508 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 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 [2021-06-05 04:58:54,533 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:54,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:54,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:54,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:54,605 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 25 treesize of output 19 [2021-06-05 04:58:54,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:54,609 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 [2021-06-05 04:58:54,610 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:54,617 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:54,617 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:54,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:58:54,618 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:58:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:54,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11611978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:54,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:54,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:58:54,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263393529] [2021-06-05 04:58:54,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:54,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:54,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:54,642 INFO L87 Difference]: Start difference. First operand 75 states and 155 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) [2021-06-05 04:58:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:54,761 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-06-05 04:58:54,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:58:54,762 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 [2021-06-05 04:58:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:54,762 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:58:54,762 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:58:54,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 178.0ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:54,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:58:54,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2021-06-05 04:58:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 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) [2021-06-05 04:58:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 04:58:54,763 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 04:58:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:54,763 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 04:58:54,763 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) [2021-06-05 04:58:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 04:58:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:54,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:54,764 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:54,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-06-05 04:58:54,964 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:54,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:54,964 INFO L82 PathProgramCache]: Analyzing trace with hash -9865576, now seen corresponding path program 137 times [2021-06-05 04:58:54,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:54,964 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831319301] [2021-06-05 04:58:54,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:55,043 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:55,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831319301] [2021-06-05 04:58:55,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831319301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:55,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603754924] [2021-06-05 04:58:55,043 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 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 [2021-06-05 04:58:55,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:58:55,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:55,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:55,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:55,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:55,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603754924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:55,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:55,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:58:55,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017896071] [2021-06-05 04:58:55,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:55,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:55,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:55,158 INFO L87 Difference]: Start difference. First operand 75 states and 155 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) [2021-06-05 04:58:55,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:55,400 INFO L93 Difference]: Finished difference Result 125 states and 244 transitions. [2021-06-05 04:58:55,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:58:55,401 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 [2021-06-05 04:58:55,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:55,401 INFO L225 Difference]: With dead ends: 125 [2021-06-05 04:58:55,401 INFO L226 Difference]: Without dead ends: 125 [2021-06-05 04:58:55,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 04:58:55,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-06-05 04:58:55,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2021-06-05 04:58:55,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 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) [2021-06-05 04:58:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 04:58:55,402 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 04:58:55,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:55,402 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 04:58:55,402 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) [2021-06-05 04:58:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 04:58:55,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:55,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:55,403 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:55,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:55,603 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:55,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:55,603 INFO L82 PathProgramCache]: Analyzing trace with hash -457203299, now seen corresponding path program 138 times [2021-06-05 04:58:55,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:55,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667859178] [2021-06-05 04:58:55,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:55,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:55,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667859178] [2021-06-05 04:58:55,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667859178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:55,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015960470] [2021-06-05 04:58:55,682 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 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 [2021-06-05 04:58:55,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:55,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:55,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:55,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:55,818 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:55,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015960470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:55,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:55,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:58:55,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618284908] [2021-06-05 04:58:55,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:55,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:55,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:55,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:55,819 INFO L87 Difference]: Start difference. First operand 75 states and 155 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) [2021-06-05 04:58:56,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:56,081 INFO L93 Difference]: Finished difference Result 116 states and 228 transitions. [2021-06-05 04:58:56,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:58:56,081 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 17 [2021-06-05 04:58:56,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:56,082 INFO L225 Difference]: With dead ends: 116 [2021-06-05 04:58:56,082 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:58:56,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 04:58:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:58:56,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-06-05 04:58:56,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0945945945945947) internal successors, (155), 74 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) [2021-06-05 04:58:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 155 transitions. [2021-06-05 04:58:56,083 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 155 transitions. Word has length 17 [2021-06-05 04:58:56,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:56,083 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 155 transitions. [2021-06-05 04:58:56,083 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) [2021-06-05 04:58:56,083 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 155 transitions. [2021-06-05 04:58:56,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:56,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:56,083 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:56,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,142 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:56,284 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:56,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:56,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1854966752, now seen corresponding path program 139 times [2021-06-05 04:58:56,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:56,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936034944] [2021-06-05 04:58:56,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:56,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:56,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:56,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:56,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936034944] [2021-06-05 04:58:56,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936034944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:56,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736682981] [2021-06-05 04:58:56,416 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 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 [2021-06-05 04:58:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:56,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:56,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:56,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736682981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:56,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:56,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 04:58:56,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667135404] [2021-06-05 04:58:56,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 04:58:56,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:56,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 04:58:56,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:56,536 INFO L87 Difference]: Start difference. First operand 75 states and 155 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) [2021-06-05 04:58:56,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:56,747 INFO L93 Difference]: Finished difference Result 103 states and 206 transitions. [2021-06-05 04:58:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 04:58:56,747 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 17 [2021-06-05 04:58:56,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:56,748 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:58:56,748 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 04:58:56,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 263.3ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 04:58:56,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 04:58:56,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 75. [2021-06-05 04:58:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.081081081081081) internal successors, (154), 74 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) [2021-06-05 04:58:56,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 154 transitions. [2021-06-05 04:58:56,749 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 154 transitions. Word has length 17 [2021-06-05 04:58:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:56,749 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 154 transitions. [2021-06-05 04:58:56,749 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) [2021-06-05 04:58:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 154 transitions. [2021-06-05 04:58:56,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:56,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:56,749 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:56,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-06-05 04:58:56,950 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:56,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:56,950 INFO L82 PathProgramCache]: Analyzing trace with hash 253585771, now seen corresponding path program 140 times [2021-06-05 04:58:56,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:56,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147661979] [2021-06-05 04:58:56,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:57,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:57,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147661979] [2021-06-05 04:58:57,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147661979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:57,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392666247] [2021-06-05 04:58:57,047 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 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 [2021-06-05 04:58:57,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:58:57,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:57,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:57,163 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 17 treesize of output 13 [2021-06-05 04:58:57,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,166 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 [2021-06-05 04:58:57,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,169 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 [2021-06-05 04:58:57,170 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,172 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 17 treesize of output 13 [2021-06-05 04:58:57,173 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,175 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 [2021-06-05 04:58:57,176 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,178 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:57,179 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:57,204 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:57,205 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:58:57,205 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:58:57,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:57,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392666247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:57,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:57,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:58:57,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964473765] [2021-06-05 04:58:57,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:57,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:57,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:57,244 INFO L87 Difference]: Start difference. First operand 75 states and 154 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) [2021-06-05 04:58:57,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:57,345 INFO L93 Difference]: Finished difference Result 89 states and 175 transitions. [2021-06-05 04:58:57,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:58:57,345 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 [2021-06-05 04:58:57,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:57,345 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:58:57,345 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:58:57,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:58:57,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:58:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-06-05 04:58:57,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 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) [2021-06-05 04:58:57,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-06-05 04:58:57,346 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-06-05 04:58:57,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:57,347 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-06-05 04:58:57,347 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) [2021-06-05 04:58:57,347 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-06-05 04:58:57,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:57,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:57,347 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:57,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-06-05 04:58:57,563 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:57,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1784511978, now seen corresponding path program 141 times [2021-06-05 04:58:57,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:57,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791983502] [2021-06-05 04:58:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:57,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:57,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:57,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791983502] [2021-06-05 04:58:57,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791983502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:57,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560679090] [2021-06-05 04:58:57,659 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 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 [2021-06-05 04:58:57,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:58:57,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:57,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:57,744 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 25 treesize of output 19 [2021-06-05 04:58:57,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,747 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 [2021-06-05 04:58:57,747 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:57,754 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:57,755 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:58:57,755 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:58:57,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:57,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560679090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:57,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:57,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:58:57,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711277835] [2021-06-05 04:58:57,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:58:57,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:57,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:58:57,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:58:57,779 INFO L87 Difference]: Start difference. First operand 75 states and 153 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) [2021-06-05 04:58:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:57,863 INFO L93 Difference]: Finished difference Result 92 states and 186 transitions. [2021-06-05 04:58:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:58:57,864 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 [2021-06-05 04:58:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:57,864 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:58:57,864 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:58:57,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:58:57,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 75. [2021-06-05 04:58:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0675675675675675) internal successors, (153), 74 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) [2021-06-05 04:58:57,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 153 transitions. [2021-06-05 04:58:57,865 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 153 transitions. Word has length 17 [2021-06-05 04:58:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 153 transitions. [2021-06-05 04:58:57,865 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) [2021-06-05 04:58:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 153 transitions. [2021-06-05 04:58:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:57,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:57,866 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:58,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3394 [2021-06-05 04:58:58,082 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash 1389689775, now seen corresponding path program 142 times [2021-06-05 04:58:58,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:58,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966336008] [2021-06-05 04:58:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:58,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:58,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:58,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966336008] [2021-06-05 04:58:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966336008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:58,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862310613] [2021-06-05 04:58:58,184 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 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 [2021-06-05 04:58:58,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:58:58,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:58,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:58,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:58,331 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 17 treesize of output 13 [2021-06-05 04:58:58,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,335 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 17 treesize of output 13 [2021-06-05 04:58:58,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,338 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 [2021-06-05 04:58:58,339 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,342 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:58:58,342 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,345 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 [2021-06-05 04:58:58,346 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,351 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 [2021-06-05 04:58:58,352 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,376 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:58,376 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:58,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:58:58,380 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:58:58,421 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:58,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862310613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:58,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:58,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:58:58,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590813062] [2021-06-05 04:58:58,422 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:58,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:58,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:58,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:58,422 INFO L87 Difference]: Start difference. First operand 75 states and 153 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) [2021-06-05 04:58:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:58,582 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 04:58:58,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:58:58,583 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 [2021-06-05 04:58:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:58,583 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:58:58,583 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:58:58,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:58:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:58:58,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2021-06-05 04:58:58,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 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) [2021-06-05 04:58:58,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 04:58:58,584 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 04:58:58,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:58,584 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 04:58:58,584 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) [2021-06-05 04:58:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 04:58:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:58,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:58,584 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:58,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-06-05 04:58:58,785 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:58,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:58,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2131811152, now seen corresponding path program 143 times [2021-06-05 04:58:58,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:58,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887221035] [2021-06-05 04:58:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:58,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887221035] [2021-06-05 04:58:58,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887221035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212406455] [2021-06-05 04:58:58,888 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 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 [2021-06-05 04:58:58,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:58:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:58,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:58,977 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 [2021-06-05 04:58:58,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,979 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 25 treesize of output 19 [2021-06-05 04:58:58,980 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:58:58,987 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:58,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:58:58,988 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:58:59,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:59,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212406455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:59,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:59,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:58:59,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550150397] [2021-06-05 04:58:59,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:58:59,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:59,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:58:59,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:58:59,012 INFO L87 Difference]: Start difference. First operand 75 states and 152 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) [2021-06-05 04:58:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:59,114 INFO L93 Difference]: Finished difference Result 104 states and 209 transitions. [2021-06-05 04:58:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:58:59,115 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 [2021-06-05 04:58:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:59,115 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:58:59,115 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:58:59,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:59,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:58:59,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 75. [2021-06-05 04:58:59,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 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) [2021-06-05 04:58:59,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 04:58:59,116 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 04:58:59,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:59,116 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 04:58:59,116 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) [2021-06-05 04:58:59,116 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 04:58:59,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:59,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:59,117 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:59,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3406 [2021-06-05 04:58:59,317 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:59,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:59,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1149243627, now seen corresponding path program 144 times [2021-06-05 04:58:59,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:59,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527076951] [2021-06-05 04:58:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:58:59,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:59,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:58:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527076951] [2021-06-05 04:58:59,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527076951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:59,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055172507] [2021-06-05 04:58:59,401 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 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 [2021-06-05 04:58:59,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:58:59,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:58:59,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:58:59,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:58:59,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:59,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:59,530 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 15 treesize of output 11 [2021-06-05 04:58:59,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:59,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:58:59,533 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 16 treesize of output 12 [2021-06-05 04:58:59,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:58:59,562 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:58:59,562 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:58:59,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:58:59,563 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:58:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:58:59,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055172507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:58:59,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:58:59,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:58:59,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456521196] [2021-06-05 04:58:59,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:58:59,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:58:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:58:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:58:59,607 INFO L87 Difference]: Start difference. First operand 75 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:58:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:58:59,776 INFO L93 Difference]: Finished difference Result 98 states and 187 transitions. [2021-06-05 04:58:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:58:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 04:58:59,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:58:59,776 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:58:59,776 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 04:58:59,777 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 206.9ms TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:58:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 04:58:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 79. [2021-06-05 04:58:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 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) [2021-06-05 04:58:59,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 04:58:59,778 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 04:58:59,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:58:59,778 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 04:58:59,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:58:59,778 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 04:58:59,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:58:59,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:58:59,778 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:58:59,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:58:59,978 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:58:59,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:58:59,979 INFO L82 PathProgramCache]: Analyzing trace with hash 896088362, now seen corresponding path program 145 times [2021-06-05 04:58:59,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:58:59,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676561904] [2021-06-05 04:58:59,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:58:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:00,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:00,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:00,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676561904] [2021-06-05 04:59:00,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676561904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:00,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587633879] [2021-06-05 04:59:00,067 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 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 [2021-06-05 04:59:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:00,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:00,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:00,159 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 [2021-06-05 04:59:00,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,162 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 15 treesize of output 11 [2021-06-05 04:59:00,163 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,165 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:00,166 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,168 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 16 treesize of output 12 [2021-06-05 04:59:00,168 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,199 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 04:59:00,200 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:00,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:00,200 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:00,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587633879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:00,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:00,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:00,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757438165] [2021-06-05 04:59:00,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:00,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:00,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:00,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:00,238 INFO L87 Difference]: Start difference. First operand 79 states and 160 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) [2021-06-05 04:59:00,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:00,471 INFO L93 Difference]: Finished difference Result 114 states and 229 transitions. [2021-06-05 04:59:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:00,471 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 [2021-06-05 04:59:00,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:00,471 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:59:00,471 INFO L226 Difference]: Without dead ends: 114 [2021-06-05 04:59:00,471 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 263.1ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:59:00,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-06-05 04:59:00,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2021-06-05 04:59:00,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 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) [2021-06-05 04:59:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 04:59:00,472 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 04:59:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:00,473 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 04:59:00,473 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) [2021-06-05 04:59:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 04:59:00,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:00,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:00,473 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:00,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3427,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:00,677 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:00,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:00,677 INFO L82 PathProgramCache]: Analyzing trace with hash 448750639, now seen corresponding path program 146 times [2021-06-05 04:59:00,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:00,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659034054] [2021-06-05 04:59:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:00,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:00,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659034054] [2021-06-05 04:59:00,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659034054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:00,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175818410] [2021-06-05 04:59:00,760 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:00,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:00,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:00,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:00,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:00,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,884 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 15 treesize of output 11 [2021-06-05 04:59:00,885 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:00,887 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 16 treesize of output 12 [2021-06-05 04:59:00,888 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:00,915 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:00,915 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:00,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:00,916 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:00,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:00,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175818410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:00,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:00,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:00,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553949310] [2021-06-05 04:59:00,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:00,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:00,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:00,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:00,952 INFO L87 Difference]: Start difference. First operand 79 states and 160 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) [2021-06-05 04:59:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:01,049 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-06-05 04:59:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:01,049 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 [2021-06-05 04:59:01,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:01,049 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:59:01,049 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 04:59:01,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 155.7ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:01,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 04:59:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-06-05 04:59:01,050 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) [2021-06-05 04:59:01,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 145 transitions. [2021-06-05 04:59:01,050 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 145 transitions. Word has length 17 [2021-06-05 04:59:01,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:01,050 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 145 transitions. [2021-06-05 04:59:01,050 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) [2021-06-05 04:59:01,051 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 145 transitions. [2021-06-05 04:59:01,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:01,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:01,051 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:01,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3437 [2021-06-05 04:59:01,251 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:01,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:01,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1865041723, now seen corresponding path program 147 times [2021-06-05 04:59:01,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:01,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427668848] [2021-06-05 04:59:01,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:01,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:01,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427668848] [2021-06-05 04:59:01,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427668848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:01,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249130820] [2021-06-05 04:59:01,357 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 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 [2021-06-05 04:59:01,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:59:01,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:01,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:01,472 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 17 treesize of output 13 [2021-06-05 04:59:01,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,476 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 [2021-06-05 04:59:01,476 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,479 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 [2021-06-05 04:59:01,480 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,482 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 [2021-06-05 04:59:01,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,485 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:01,485 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,487 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 17 treesize of output 13 [2021-06-05 04:59:01,488 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:01,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:01,512 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:01,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:01,513 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:01,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249130820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:01,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:01,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:01,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792707333] [2021-06-05 04:59:01,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:01,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:01,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:01,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:01,551 INFO L87 Difference]: Start difference. First operand 72 states and 145 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) [2021-06-05 04:59:01,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:01,651 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 04:59:01,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:01,652 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 [2021-06-05 04:59:01,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:01,652 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:59:01,652 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:59:01,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:01,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:59:01,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-06-05 04:59:01,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 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) [2021-06-05 04:59:01,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 04:59:01,653 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 04:59:01,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:01,653 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 04:59:01,653 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) [2021-06-05 04:59:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 04:59:01,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:01,653 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:01,653 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:01,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3453,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:01,854 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:01,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1122920346, now seen corresponding path program 148 times [2021-06-05 04:59:01,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:01,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222310783] [2021-06-05 04:59:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:01,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:01,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:01,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222310783] [2021-06-05 04:59:01,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222310783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:01,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425388757] [2021-06-05 04:59:01,973 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 04:59:02,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:02,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:02,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:02,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:02,061 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 25 treesize of output 19 [2021-06-05 04:59:02,062 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,063 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 [2021-06-05 04:59:02,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:02,071 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:02,071 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,072 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:02,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425388757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:02,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:02,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:02,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995410350] [2021-06-05 04:59:02,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:02,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:02,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:02,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:02,094 INFO L87 Difference]: Start difference. First operand 74 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) [2021-06-05 04:59:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:02,167 INFO L93 Difference]: Finished difference Result 87 states and 174 transitions. [2021-06-05 04:59:02,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:02,167 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 [2021-06-05 04:59:02,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:02,167 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:02,167 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:59:02,167 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 154.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:59:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 74. [2021-06-05 04:59:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 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) [2021-06-05 04:59:02,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 04:59:02,168 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 04:59:02,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:02,168 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 04:59:02,168 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) [2021-06-05 04:59:02,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 04:59:02,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:02,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:02,169 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:02,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3462 [2021-06-05 04:59:02,377 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2105487871, now seen corresponding path program 149 times [2021-06-05 04:59:02,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:02,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214765726] [2021-06-05 04:59:02,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:02,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214765726] [2021-06-05 04:59:02,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214765726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:02,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301710292] [2021-06-05 04:59:02,465 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 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 [2021-06-05 04:59:02,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:02,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:02,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:02,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:02,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:02,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:02,597 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 16 treesize of output 12 [2021-06-05 04:59:02,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:02,600 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 15 treesize of output 11 [2021-06-05 04:59:02,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:02,628 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:02,628 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:02,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:02,628 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:02,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301710292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:02,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:02,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:02,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885648112] [2021-06-05 04:59:02,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:02,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:02,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:02,683 INFO L87 Difference]: Start difference. First operand 74 states and 149 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) [2021-06-05 04:59:02,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:02,840 INFO L93 Difference]: Finished difference Result 100 states and 191 transitions. [2021-06-05 04:59:02,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:02,840 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 [2021-06-05 04:59:02,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:02,840 INFO L225 Difference]: With dead ends: 100 [2021-06-05 04:59:02,841 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:59:02,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:59:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-06-05 04:59:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 04:59:02,842 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 04:59:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:02,842 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 04:59:02,842 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) [2021-06-05 04:59:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 04:59:02,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:02,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:02,842 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:03,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3465,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:03,043 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:03,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:03,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1936324160, now seen corresponding path program 150 times [2021-06-05 04:59:03,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:03,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920347897] [2021-06-05 04:59:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:03,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:03,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920347897] [2021-06-05 04:59:03,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920347897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:03,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272502569] [2021-06-05 04:59:03,136 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 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 [2021-06-05 04:59:03,161 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:03,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:03,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:03,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:03,219 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 [2021-06-05 04:59:03,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,222 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 [2021-06-05 04:59:03,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:03,225 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:03,225 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 15 treesize of output 11 [2021-06-05 04:59:03,226 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,228 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:03,228 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 [2021-06-05 04:59:03,229 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,262 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:03,262 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:03,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:03,262 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:03,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272502569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:03,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:03,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:03,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564550220] [2021-06-05 04:59:03,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:03,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:03,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:03,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:03,300 INFO L87 Difference]: Start difference. First operand 79 states and 161 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:03,466 INFO L93 Difference]: Finished difference Result 128 states and 250 transitions. [2021-06-05 04:59:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:03,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:03,467 INFO L225 Difference]: With dead ends: 128 [2021-06-05 04:59:03,467 INFO L226 Difference]: Without dead ends: 128 [2021-06-05 04:59:03,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:03,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-06-05 04:59:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 79. [2021-06-05 04:59:03,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0641025641025643) internal successors, (161), 78 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:03,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 161 transitions. [2021-06-05 04:59:03,468 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 161 transitions. Word has length 17 [2021-06-05 04:59:03,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:03,468 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 161 transitions. [2021-06-05 04:59:03,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 161 transitions. [2021-06-05 04:59:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:03,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:03,468 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:03,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3483,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:03,669 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:03,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:03,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1488986437, now seen corresponding path program 151 times [2021-06-05 04:59:03,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:03,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024673400] [2021-06-05 04:59:03,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:03,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:03,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:03,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:03,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024673400] [2021-06-05 04:59:03,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024673400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:03,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594370440] [2021-06-05 04:59:03,758 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 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 [2021-06-05 04:59:03,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:03,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:03,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:03,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:03,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:03,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:59:03,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:03,880 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 15 treesize of output 11 [2021-06-05 04:59:03,881 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:03,909 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:03,909 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:03,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:03,910 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:03,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594370440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:03,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:03,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:03,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105879285] [2021-06-05 04:59:03,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:03,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:03,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:03,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:03,944 INFO L87 Difference]: Start difference. First operand 79 states and 161 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) [2021-06-05 04:59:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:04,037 INFO L93 Difference]: Finished difference Result 85 states and 170 transitions. [2021-06-05 04:59:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:04,037 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 17 [2021-06-05 04:59:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:04,037 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:59:04,037 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 04:59:04,038 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 04:59:04,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 75. [2021-06-05 04:59:04,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.054054054054054) internal successors, (152), 74 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) [2021-06-05 04:59:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 152 transitions. [2021-06-05 04:59:04,039 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 152 transitions. Word has length 17 [2021-06-05 04:59:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:04,039 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 152 transitions. [2021-06-05 04:59:04,039 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) [2021-06-05 04:59:04,039 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 152 transitions. [2021-06-05 04:59:04,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:04,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:04,039 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:04,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3493 [2021-06-05 04:59:04,239 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:04,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:04,240 INFO L82 PathProgramCache]: Analyzing trace with hash -493810808, now seen corresponding path program 152 times [2021-06-05 04:59:04,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:04,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287744230] [2021-06-05 04:59:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:04,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:04,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287744230] [2021-06-05 04:59:04,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287744230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:04,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967115582] [2021-06-05 04:59:04,330 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 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 [2021-06-05 04:59:04,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:04,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:04,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:04,419 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 [2021-06-05 04:59:04,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:04,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:04,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:04,423 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 15 treesize of output 11 [2021-06-05 04:59:04,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:04,426 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 8 treesize of output 6 [2021-06-05 04:59:04,427 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:04,429 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:04,429 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 16 treesize of output 12 [2021-06-05 04:59:04,431 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:04,464 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:04,464 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:04,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:04,467 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:04,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967115582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:04,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:04,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:04,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950220905] [2021-06-05 04:59:04,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:04,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:04,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:04,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:04,523 INFO L87 Difference]: Start difference. First operand 75 states and 152 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) [2021-06-05 04:59:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:04,697 INFO L93 Difference]: Finished difference Result 102 states and 203 transitions. [2021-06-05 04:59:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:59:04,698 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 17 [2021-06-05 04:59:04,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:04,698 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:59:04,698 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 04:59:04,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 234.4ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:59:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 04:59:04,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 73. [2021-06-05 04:59:04,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 72 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:04,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 147 transitions. [2021-06-05 04:59:04,699 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 147 transitions. Word has length 17 [2021-06-05 04:59:04,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:04,699 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 147 transitions. [2021-06-05 04:59:04,699 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) [2021-06-05 04:59:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 147 transitions. [2021-06-05 04:59:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:04,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:04,699 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:04,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3509,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:04,900 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:04,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:04,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1517742549, now seen corresponding path program 153 times [2021-06-05 04:59:04,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:04,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819886167] [2021-06-05 04:59:04,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:04,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:04,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819886167] [2021-06-05 04:59:04,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819886167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:04,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182716545] [2021-06-05 04:59:04,986 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 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 [2021-06-05 04:59:05,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:05,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:05,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:05,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:05,089 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 [2021-06-05 04:59:05,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:05,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:05,093 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 15 treesize of output 11 [2021-06-05 04:59:05,094 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:05,119 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:05,119 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:05,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:05,120 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:05,172 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:05,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182716545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:05,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:05,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:05,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518776984] [2021-06-05 04:59:05,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:05,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:05,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:05,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:05,173 INFO L87 Difference]: Start difference. First operand 73 states and 147 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) [2021-06-05 04:59:05,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:05,340 INFO L93 Difference]: Finished difference Result 105 states and 201 transitions. [2021-06-05 04:59:05,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:59:05,340 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 [2021-06-05 04:59:05,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:05,340 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:59:05,340 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:59:05,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:05,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:59:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-06-05 04:59:05,341 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) [2021-06-05 04:59:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 04:59:05,341 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 04:59:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:05,341 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 04:59:05,341 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) [2021-06-05 04:59:05,341 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 04:59:05,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:05,342 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:05,342 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:05,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3522,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:05,542 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:05,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:05,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1770897814, now seen corresponding path program 154 times [2021-06-05 04:59:05,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:05,542 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228964880] [2021-06-05 04:59:05,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:05,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:05,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228964880] [2021-06-05 04:59:05,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228964880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:05,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214333834] [2021-06-05 04:59:05,645 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 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 [2021-06-05 04:59:05,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:05,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:05,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:05,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:05,778 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 [2021-06-05 04:59:05,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:05,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:05,781 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 [2021-06-05 04:59:05,782 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:05,821 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 04:59:05,824 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 [2021-06-05 04:59:05,825 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:05,838 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:05,838 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:05,838 INFO L518 ElimStorePlain]: Eliminatee v_prenex_86 vanished before elimination [2021-06-05 04:59:05,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:05,839 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:05,882 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:05,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214333834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:05,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:05,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:05,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066632612] [2021-06-05 04:59:05,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:05,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:05,883 INFO L87 Difference]: Start difference. First operand 80 states and 165 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:06,065 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-06-05 04:59:06,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:06,065 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:06,066 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:59:06,066 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:59:06,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 246.7ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:06,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:59:06,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-06-05 04:59:06,067 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) [2021-06-05 04:59:06,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 04:59:06,067 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 04:59:06,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:06,067 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 04:59:06,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:06,067 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 04:59:06,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:06,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:06,067 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:06,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3532,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:06,268 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash 2076731759, now seen corresponding path program 155 times [2021-06-05 04:59:06,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:06,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785418598] [2021-06-05 04:59:06,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:06,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:06,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:06,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:06,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785418598] [2021-06-05 04:59:06,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785418598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:06,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742070414] [2021-06-05 04:59:06,353 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 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 [2021-06-05 04:59:06,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:06,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:06,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:06,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:06,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:06,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:59:06,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:06,455 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 15 treesize of output 11 [2021-06-05 04:59:06,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:06,480 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:06,480 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:06,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:06,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:06,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742070414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:06,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:06,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:06,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717852997] [2021-06-05 04:59:06,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:06,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:06,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:06,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:06,515 INFO L87 Difference]: Start difference. First operand 80 states and 165 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) [2021-06-05 04:59:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:06,614 INFO L93 Difference]: Finished difference Result 105 states and 204 transitions. [2021-06-05 04:59:06,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:06,615 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 17 [2021-06-05 04:59:06,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:06,615 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:59:06,615 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:59:06,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:06,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:59:06,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 80. [2021-06-05 04:59:06,616 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) [2021-06-05 04:59:06,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 165 transitions. [2021-06-05 04:59:06,616 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 165 transitions. Word has length 17 [2021-06-05 04:59:06,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:06,616 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 165 transitions. [2021-06-05 04:59:06,616 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) [2021-06-05 04:59:06,616 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 165 transitions. [2021-06-05 04:59:06,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:06,616 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:06,616 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:06,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3549 [2021-06-05 04:59:06,817 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:06,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:06,817 INFO L82 PathProgramCache]: Analyzing trace with hash 93934514, now seen corresponding path program 156 times [2021-06-05 04:59:06,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:06,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005248196] [2021-06-05 04:59:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:06,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:06,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:06,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005248196] [2021-06-05 04:59:06,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005248196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:06,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615620684] [2021-06-05 04:59:06,905 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 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 [2021-06-05 04:59:06,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:06,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:06,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:06,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:07,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:07,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:07,071 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 15 treesize of output 11 [2021-06-05 04:59:07,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:07,074 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:07,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:07,115 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 04:59:07,115 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:07,118 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 [2021-06-05 04:59:07,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:07,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:07,134 INFO L518 ElimStorePlain]: Eliminatee v_prenex_90 vanished before elimination [2021-06-05 04:59:07,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:07,135 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:07,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615620684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:07,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:07,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:07,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348234194] [2021-06-05 04:59:07,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:07,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:07,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:07,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:07,202 INFO L87 Difference]: Start difference. First operand 80 states and 165 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) [2021-06-05 04:59:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:07,397 INFO L93 Difference]: Finished difference Result 118 states and 229 transitions. [2021-06-05 04:59:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:07,398 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 17 [2021-06-05 04:59:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:07,398 INFO L225 Difference]: With dead ends: 118 [2021-06-05 04:59:07,398 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 04:59:07,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 265.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 04:59:07,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-06-05 04:59:07,399 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) [2021-06-05 04:59:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 162 transitions. [2021-06-05 04:59:07,399 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 162 transitions. Word has length 17 [2021-06-05 04:59:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:07,399 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 162 transitions. [2021-06-05 04:59:07,399 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) [2021-06-05 04:59:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 162 transitions. [2021-06-05 04:59:07,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:07,399 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:07,400 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:07,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3557,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:07,600 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:07,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1541501957, now seen corresponding path program 157 times [2021-06-05 04:59:07,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:07,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194600021] [2021-06-05 04:59:07,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:07,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:07,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194600021] [2021-06-05 04:59:07,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194600021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:07,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979983754] [2021-06-05 04:59:07,705 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 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 [2021-06-05 04:59:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:07,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:07,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:07,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979983754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:07,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:07,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:07,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662751013] [2021-06-05 04:59:07,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:07,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:07,814 INFO L87 Difference]: Start difference. First operand 79 states and 162 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) [2021-06-05 04:59:07,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:07,899 INFO L93 Difference]: Finished difference Result 90 states and 180 transitions. [2021-06-05 04:59:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:07,899 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 [2021-06-05 04:59:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:07,899 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:59:07,899 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:59:07,899 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:07,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:59:07,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 74. [2021-06-05 04:59:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0547945205479454) internal successors, (150), 73 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 150 transitions. [2021-06-05 04:59:07,900 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 150 transitions. Word has length 17 [2021-06-05 04:59:07,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:07,900 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 150 transitions. [2021-06-05 04:59:07,901 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) [2021-06-05 04:59:07,901 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 150 transitions. [2021-06-05 04:59:07,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:07,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:07,901 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:08,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3577,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:08,106 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:08,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1169645670, now seen corresponding path program 158 times [2021-06-05 04:59:08,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:08,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815914468] [2021-06-05 04:59:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:08,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:08,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:08,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:08,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815914468] [2021-06-05 04:59:08,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815914468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:08,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252276788] [2021-06-05 04:59:08,233 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 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 [2021-06-05 04:59:08,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:08,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:08,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:08,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:08,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252276788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:08,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:08,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:08,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046726481] [2021-06-05 04:59:08,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:08,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:08,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:08,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:08,376 INFO L87 Difference]: Start difference. First operand 74 states and 150 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) [2021-06-05 04:59:08,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:08,504 INFO L93 Difference]: Finished difference Result 84 states and 166 transitions. [2021-06-05 04:59:08,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:08,504 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 [2021-06-05 04:59:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:08,504 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:59:08,504 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:59:08,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 238.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:08,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:59:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2021-06-05 04:59:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 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) [2021-06-05 04:59:08,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 04:59:08,505 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 04:59:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:08,506 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 04:59:08,506 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) [2021-06-05 04:59:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 04:59:08,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:08,506 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:08,506 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:08,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3580,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:08,722 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:08,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1726613223, now seen corresponding path program 159 times [2021-06-05 04:59:08,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:08,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374722133] [2021-06-05 04:59:08,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:08,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:08,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:08,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374722133] [2021-06-05 04:59:08,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374722133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:08,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794249542] [2021-06-05 04:59:08,827 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 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 [2021-06-05 04:59:08,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:08,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:08,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:08,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:08,951 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 17 treesize of output 13 [2021-06-05 04:59:08,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,954 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 [2021-06-05 04:59:08,955 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,957 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 [2021-06-05 04:59:08,958 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,961 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 [2021-06-05 04:59:08,961 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:08,964 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,967 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 17 treesize of output 13 [2021-06-05 04:59:08,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:08,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:08,995 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:08,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:08,996 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:09,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:09,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794249542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:09,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:09,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:09,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561353042] [2021-06-05 04:59:09,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:09,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:09,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:09,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:09,034 INFO L87 Difference]: Start difference. First operand 74 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) [2021-06-05 04:59:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:09,128 INFO L93 Difference]: Finished difference Result 89 states and 174 transitions. [2021-06-05 04:59:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:09,129 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 [2021-06-05 04:59:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:09,129 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:59:09,129 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:59:09,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 171.8ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:09,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:59:09,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2021-06-05 04:59:09,130 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) [2021-06-05 04:59:09,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 04:59:09,130 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 04:59:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:09,130 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 04:59:09,130 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) [2021-06-05 04:59:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 04:59:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:09,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:09,130 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:09,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3586,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:09,347 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:09,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:09,347 INFO L82 PathProgramCache]: Analyzing trace with hash -195687016, now seen corresponding path program 160 times [2021-06-05 04:59:09,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:09,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787048989] [2021-06-05 04:59:09,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:09,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:09,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:09,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787048989] [2021-06-05 04:59:09,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787048989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:09,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830783353] [2021-06-05 04:59:09,445 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 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 [2021-06-05 04:59:09,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:09,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:09,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:09,547 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 [2021-06-05 04:59:09,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:09,550 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 25 treesize of output 19 [2021-06-05 04:59:09,551 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:09,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:09,558 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:09,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:09,559 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:09,582 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:09,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830783353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:09,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:09,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:09,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986759905] [2021-06-05 04:59:09,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:09,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:09,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:09,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:09,582 INFO L87 Difference]: Start difference. First operand 77 states and 155 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) [2021-06-05 04:59:09,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:09,674 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 04:59:09,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:09,674 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 [2021-06-05 04:59:09,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:09,674 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:59:09,675 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:59:09,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:59:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-06-05 04:59:09,675 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) [2021-06-05 04:59:09,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 04:59:09,676 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 04:59:09,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:09,676 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 04:59:09,676 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) [2021-06-05 04:59:09,676 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 04:59:09,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:09,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:09,676 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:09,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3595 [2021-06-05 04:59:09,885 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash -590509219, now seen corresponding path program 161 times [2021-06-05 04:59:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:09,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174133361] [2021-06-05 04:59:09,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:09,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:09,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:09,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174133361] [2021-06-05 04:59:09,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174133361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:09,993 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249149001] [2021-06-05 04:59:09,993 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 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 [2021-06-05 04:59:10,019 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:10,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:10,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:10,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:10,126 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 [2021-06-05 04:59:10,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,129 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 [2021-06-05 04:59:10,130 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,133 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 [2021-06-05 04:59:10,133 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,136 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 17 treesize of output 13 [2021-06-05 04:59:10,136 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,139 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 17 treesize of output 13 [2021-06-05 04:59:10,139 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,141 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:10,142 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:10,166 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:10,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:10,167 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:10,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249149001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:10,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:10,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:10,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614277822] [2021-06-05 04:59:10,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:10,206 INFO L87 Difference]: Start difference. First operand 77 states and 155 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) [2021-06-05 04:59:10,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:10,316 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 04:59:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:10,317 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 [2021-06-05 04:59:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:10,317 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:10,317 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:59:10,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 218.2ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:59:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 04:59:10,318 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) [2021-06-05 04:59:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:10,318 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:10,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:10,318 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:10,318 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) [2021-06-05 04:59:10,318 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:10,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:10,318 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:10,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3598,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:10,519 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash 151612158, now seen corresponding path program 162 times [2021-06-05 04:59:10,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:10,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062082934] [2021-06-05 04:59:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:10,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:10,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:10,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062082934] [2021-06-05 04:59:10,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062082934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:10,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840091086] [2021-06-05 04:59:10,629 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 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 [2021-06-05 04:59:10,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:10,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:10,725 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 [2021-06-05 04:59:10,726 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,728 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 25 treesize of output 19 [2021-06-05 04:59:10,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:10,737 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:10,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:10,737 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:10,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840091086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:10,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:10,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:10,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275537364] [2021-06-05 04:59:10,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:10,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:10,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:10,762 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:10,859 INFO L93 Difference]: Finished difference Result 105 states and 211 transitions. [2021-06-05 04:59:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:10,860 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 [2021-06-05 04:59:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:10,860 INFO L225 Difference]: With dead ends: 105 [2021-06-05 04:59:10,860 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 04:59:10,860 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 04:59:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-06-05 04:59:10,861 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) [2021-06-05 04:59:10,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:10,861 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:10,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:10,861 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:10,861 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) [2021-06-05 04:59:10,861 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:10,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:10,861 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:11,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3607,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:11,062 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:11,062 INFO L82 PathProgramCache]: Analyzing trace with hash -830955367, now seen corresponding path program 163 times [2021-06-05 04:59:11,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:11,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399888539] [2021-06-05 04:59:11,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:11,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:11,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:11,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399888539] [2021-06-05 04:59:11,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399888539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:11,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621672780] [2021-06-05 04:59:11,154 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 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 [2021-06-05 04:59:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:11,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:11,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:11,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:11,282 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 15 treesize of output 11 [2021-06-05 04:59:11,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:11,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:11,285 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 [2021-06-05 04:59:11,286 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:11,313 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:11,314 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:11,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:11,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:11,360 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:11,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621672780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:11,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:11,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:11,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694059222] [2021-06-05 04:59:11,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:11,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:11,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:11,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:11,360 INFO L87 Difference]: Start difference. First operand 78 states and 157 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:11,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:11,526 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 04:59:11,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:11,526 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 04:59:11,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:11,526 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:59:11,526 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:59:11,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:59:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 04:59:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:59:11,527 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:59:11,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:11,527 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:59:11,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:11,528 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:59:11,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:11,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:11,528 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:11,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3610,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:11,728 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:11,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:11,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1084110632, now seen corresponding path program 164 times [2021-06-05 04:59:11,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:11,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930677002] [2021-06-05 04:59:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:11,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:11,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:11,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930677002] [2021-06-05 04:59:11,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930677002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:11,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700657216] [2021-06-05 04:59:11,818 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 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 [2021-06-05 04:59:11,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:11,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:11,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:11,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:11,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:11,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:11,944 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 16 treesize of output 12 [2021-06-05 04:59:11,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:11,946 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 [2021-06-05 04:59:11,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:11,949 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 [2021-06-05 04:59:11,950 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:11,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:11,953 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 15 treesize of output 11 [2021-06-05 04:59:11,953 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:11,986 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:11,986 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:11,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:11,987 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:12,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700657216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:12,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:12,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:12,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466433044] [2021-06-05 04:59:12,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:12,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:12,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:12,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:12,024 INFO L87 Difference]: Start difference. First operand 83 states and 169 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) [2021-06-05 04:59:12,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:12,203 INFO L93 Difference]: Finished difference Result 119 states and 233 transitions. [2021-06-05 04:59:12,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:12,203 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 [2021-06-05 04:59:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:12,203 INFO L225 Difference]: With dead ends: 119 [2021-06-05 04:59:12,203 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 04:59:12,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 236.9ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:59:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 04:59:12,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 83. [2021-06-05 04:59:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:12,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:59:12,204 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:59:12,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:12,204 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:59:12,204 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) [2021-06-05 04:59:12,205 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:59:12,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:12,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:12,205 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:12,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3628,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:12,405 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:12,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:12,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1531448355, now seen corresponding path program 165 times [2021-06-05 04:59:12,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:12,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793230540] [2021-06-05 04:59:12,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:12,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:12,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793230540] [2021-06-05 04:59:12,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793230540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:12,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926249596] [2021-06-05 04:59:12,496 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 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 [2021-06-05 04:59:12,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:12,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:12,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:12,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:12,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:12,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:12,626 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 15 treesize of output 11 [2021-06-05 04:59:12,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:12,629 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 16 treesize of output 12 [2021-06-05 04:59:12,630 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:12,657 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:12,657 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:12,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:12,658 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:12,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926249596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:12,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:12,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:12,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250676198] [2021-06-05 04:59:12,695 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:12,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:12,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:12,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:12,695 INFO L87 Difference]: Start difference. First operand 83 states and 169 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) [2021-06-05 04:59:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:12,798 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 04:59:12,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:12,798 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 [2021-06-05 04:59:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:12,798 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:12,798 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:59:12,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:12,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:59:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 04:59:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 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) [2021-06-05 04:59:12,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 04:59:12,799 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 04:59:12,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:12,800 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 04:59:12,800 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) [2021-06-05 04:59:12,800 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 04:59:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:12,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:12,800 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:13,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3638 [2021-06-05 04:59:13,001 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:13,001 INFO L82 PathProgramCache]: Analyzing trace with hash 780721696, now seen corresponding path program 166 times [2021-06-05 04:59:13,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:13,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508705000] [2021-06-05 04:59:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508705000] [2021-06-05 04:59:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508705000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989505905] [2021-06-05 04:59:13,088 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 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 [2021-06-05 04:59:13,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:13,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:13,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:13,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:13,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:13,183 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 15 treesize of output 11 [2021-06-05 04:59:13,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,186 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 8 treesize of output 6 [2021-06-05 04:59:13,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,188 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:13,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:13,191 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 16 treesize of output 12 [2021-06-05 04:59:13,192 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,223 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 04:59:13,223 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:13,224 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:13,224 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:13,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989505905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:13,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:13,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:13,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008294599] [2021-06-05 04:59:13,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:13,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:13,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:13,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:13,286 INFO L87 Difference]: Start difference. First operand 79 states and 160 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) [2021-06-05 04:59:13,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:13,517 INFO L93 Difference]: Finished difference Result 96 states and 191 transitions. [2021-06-05 04:59:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:13,518 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 [2021-06-05 04:59:13,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:13,518 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:59:13,518 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 04:59:13,518 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 304.6ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:59:13,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 04:59:13,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 76. [2021-06-05 04:59:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 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) [2021-06-05 04:59:13,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 04:59:13,519 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 04:59:13,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:13,519 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 04:59:13,519 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) [2021-06-05 04:59:13,519 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 04:59:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:13,519 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:13,519 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:13,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3654,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:13,720 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash 449726579, now seen corresponding path program 167 times [2021-06-05 04:59:13,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:13,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176460653] [2021-06-05 04:59:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:13,840 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:13,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:13,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176460653] [2021-06-05 04:59:13,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176460653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:13,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769722756] [2021-06-05 04:59:13,840 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 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 [2021-06-05 04:59:13,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:13,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:13,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:13,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:13,953 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 [2021-06-05 04:59:13,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,956 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 [2021-06-05 04:59:13,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,959 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 17 treesize of output 13 [2021-06-05 04:59:13,960 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,962 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 [2021-06-05 04:59:13,963 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,965 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:13,966 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,968 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 17 treesize of output 13 [2021-06-05 04:59:13,968 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:13,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:13,993 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:13,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:13,994 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:14,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:14,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769722756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:14,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:14,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:14,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621941279] [2021-06-05 04:59:14,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:14,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:14,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:14,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:14,032 INFO L87 Difference]: Start difference. First operand 76 states and 153 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) [2021-06-05 04:59:14,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:14,121 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 04:59:14,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:14,121 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 [2021-06-05 04:59:14,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:14,122 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:14,122 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:59:14,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 190.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:14,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:59:14,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 04:59:14,122 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) [2021-06-05 04:59:14,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:14,123 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:14,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:14,123 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:14,123 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) [2021-06-05 04:59:14,123 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:14,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:14,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:14,123 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:14,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3667 [2021-06-05 04:59:14,323 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:14,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:14,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1191847956, now seen corresponding path program 168 times [2021-06-05 04:59:14,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:14,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325973455] [2021-06-05 04:59:14,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:14,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:14,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325973455] [2021-06-05 04:59:14,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325973455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:14,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426730932] [2021-06-05 04:59:14,437 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 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 [2021-06-05 04:59:14,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:14,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:14,517 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 [2021-06-05 04:59:14,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,520 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 25 treesize of output 19 [2021-06-05 04:59:14,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:14,528 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:14,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:14,528 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:14,551 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:14,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426730932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:14,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:14,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:14,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712354464] [2021-06-05 04:59:14,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:14,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:14,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:14,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:14,552 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:14,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:14,632 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-06-05 04:59:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:14,633 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 [2021-06-05 04:59:14,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:14,633 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:59:14,633 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:59:14,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:14,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:59:14,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 04:59:14,634 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) [2021-06-05 04:59:14,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:14,634 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:14,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:14,634 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:14,634 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) [2021-06-05 04:59:14,634 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:14,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:14,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:14,634 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:14,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3676,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:14,853 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:14,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:14,853 INFO L82 PathProgramCache]: Analyzing trace with hash 209280431, now seen corresponding path program 169 times [2021-06-05 04:59:14,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:14,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498305134] [2021-06-05 04:59:14,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:14,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:14,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498305134] [2021-06-05 04:59:14,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498305134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:14,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946705015] [2021-06-05 04:59:14,954 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 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 [2021-06-05 04:59:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:14,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:14,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:15,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:15,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:15,076 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 [2021-06-05 04:59:15,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:15,079 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 [2021-06-05 04:59:15,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,108 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:15,109 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:15,109 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:15,109 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:15,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946705015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:15,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:15,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:15,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164029142] [2021-06-05 04:59:15,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:15,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:15,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:15,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:15,154 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:15,317 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 04:59:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:15,317 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 [2021-06-05 04:59:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:15,317 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:59:15,317 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:59:15,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:59:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:59:15,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 04:59:15,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:59:15,318 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:59:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:15,318 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:59:15,318 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) [2021-06-05 04:59:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:59:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:15,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:15,319 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:15,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3679,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:15,519 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:15,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:15,519 INFO L82 PathProgramCache]: Analyzing trace with hash -43874834, now seen corresponding path program 170 times [2021-06-05 04:59:15,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:15,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688357437] [2021-06-05 04:59:15,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:15,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688357437] [2021-06-05 04:59:15,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688357437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:15,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004467606] [2021-06-05 04:59:15,618 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 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 [2021-06-05 04:59:15,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:15,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:15,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:15,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:15,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:15,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:15,704 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 16 treesize of output 12 [2021-06-05 04:59:15,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:15,708 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:15,708 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 15 treesize of output 11 [2021-06-05 04:59:15,709 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,711 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:15,712 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,714 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 8 treesize of output 6 [2021-06-05 04:59:15,718 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:15,750 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 04:59:15,750 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:15,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:15,751 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:15,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:15,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004467606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:15,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:15,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:15,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192682826] [2021-06-05 04:59:15,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:15,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:15,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:15,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:15,788 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:15,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:15,939 INFO L93 Difference]: Finished difference Result 120 states and 235 transitions. [2021-06-05 04:59:15,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:15,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:15,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:15,939 INFO L225 Difference]: With dead ends: 120 [2021-06-05 04:59:15,940 INFO L226 Difference]: Without dead ends: 120 [2021-06-05 04:59:15,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:15,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-06-05 04:59:15,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 83. [2021-06-05 04:59:15,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:59:15,941 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:59:15,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:15,941 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:59:15,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:15,941 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:59:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:15,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:15,941 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:16,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3697,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:16,157 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:16,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:16,157 INFO L82 PathProgramCache]: Analyzing trace with hash -491212557, now seen corresponding path program 171 times [2021-06-05 04:59:16,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:16,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842068934] [2021-06-05 04:59:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:16,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:16,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842068934] [2021-06-05 04:59:16,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842068934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:16,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292026905] [2021-06-05 04:59:16,252 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 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 [2021-06-05 04:59:16,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:16,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:16,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:16,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:16,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:16,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:16,373 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 15 treesize of output 11 [2021-06-05 04:59:16,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:16,376 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 16 treesize of output 12 [2021-06-05 04:59:16,377 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,406 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:16,406 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:16,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:16,407 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292026905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:16,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:16,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000865657] [2021-06-05 04:59:16,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:16,445 INFO L87 Difference]: Start difference. First operand 83 states and 169 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) [2021-06-05 04:59:16,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:16,544 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 04:59:16,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:16,545 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 17 [2021-06-05 04:59:16,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:16,545 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:16,545 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:59:16,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 157.0ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:16,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:59:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 04:59:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 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) [2021-06-05 04:59:16,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 04:59:16,547 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 04:59:16,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:16,547 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 04:59:16,547 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) [2021-06-05 04:59:16,547 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 04:59:16,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:16,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:16,548 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:16,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3706 [2021-06-05 04:59:16,761 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:16,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:16,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1820957494, now seen corresponding path program 172 times [2021-06-05 04:59:16,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:16,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859717632] [2021-06-05 04:59:16,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:16,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:16,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:16,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859717632] [2021-06-05 04:59:16,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859717632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:16,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704175458] [2021-06-05 04:59:16,858 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 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 [2021-06-05 04:59:16,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:16,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:16,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:16,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:16,954 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 [2021-06-05 04:59:16,955 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,957 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 [2021-06-05 04:59:16,958 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:16,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:16,961 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 [2021-06-05 04:59:16,962 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:16,964 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 [2021-06-05 04:59:16,965 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:16,998 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:16,998 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:16,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:16,999 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:17,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:17,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704175458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:17,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:17,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:17,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178148819] [2021-06-05 04:59:17,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:17,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:17,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:17,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:17,056 INFO L87 Difference]: Start difference. First operand 79 states and 160 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) [2021-06-05 04:59:17,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:17,242 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-06-05 04:59:17,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:17,243 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 17 [2021-06-05 04:59:17,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:17,243 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:59:17,243 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 04:59:17,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 243.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:17,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 04:59:17,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 77. [2021-06-05 04:59:17,244 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) [2021-06-05 04:59:17,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 04:59:17,244 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 04:59:17,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:17,244 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 04:59:17,244 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) [2021-06-05 04:59:17,244 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 04:59:17,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:17,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:17,244 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:17,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3722 [2021-06-05 04:59:17,445 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:17,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:17,445 INFO L82 PathProgramCache]: Analyzing trace with hash 797025753, now seen corresponding path program 173 times [2021-06-05 04:59:17,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:17,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472472466] [2021-06-05 04:59:17,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:17,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:17,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472472466] [2021-06-05 04:59:17,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472472466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:17,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781352659] [2021-06-05 04:59:17,549 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 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 [2021-06-05 04:59:17,575 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:17,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:17,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:17,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:17,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:17,651 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:17,651 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 16 treesize of output 12 [2021-06-05 04:59:17,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:17,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:17,654 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 15 treesize of output 11 [2021-06-05 04:59:17,655 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:17,683 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:17,684 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:17,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:17,684 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:17,726 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:17,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781352659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:17,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:17,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:17,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256671021] [2021-06-05 04:59:17,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:17,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:17,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:17,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:17,726 INFO L87 Difference]: Start difference. First operand 77 states and 155 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) [2021-06-05 04:59:17,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:17,927 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 04:59:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:17,927 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 [2021-06-05 04:59:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:17,927 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:59:17,927 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:17,927 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 04:59:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 04:59:17,928 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 04:59:17,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:17,928 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 04:59:17,929 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) [2021-06-05 04:59:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 04:59:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:17,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:17,929 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:18,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3735,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:18,129 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:18,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:18,129 INFO L82 PathProgramCache]: Analyzing trace with hash 543870488, now seen corresponding path program 174 times [2021-06-05 04:59:18,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:18,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630812916] [2021-06-05 04:59:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:18,223 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:18,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630812916] [2021-06-05 04:59:18,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630812916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:18,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679581575] [2021-06-05 04:59:18,223 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 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 [2021-06-05 04:59:18,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:18,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:18,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:18,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:18,352 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 [2021-06-05 04:59:18,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:18,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:18,355 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 16 treesize of output 12 [2021-06-05 04:59:18,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:18,395 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:59:18,395 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:18,397 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 [2021-06-05 04:59:18,398 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:18,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:18,412 INFO L518 ElimStorePlain]: Eliminatee v_prenex_96 vanished before elimination [2021-06-05 04:59:18,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:18,413 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:18,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679581575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:18,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:18,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:18,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104773835] [2021-06-05 04:59:18,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:18,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:18,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:18,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:18,460 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:18,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:18,610 INFO L93 Difference]: Finished difference Result 111 states and 218 transitions. [2021-06-05 04:59:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:18,611 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:18,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:18,611 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:59:18,611 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:59:18,611 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:18,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:59:18,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 84. [2021-06-05 04:59:18,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:18,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 04:59:18,612 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 04:59:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:18,612 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 04:59:18,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 04:59:18,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:18,612 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:18,612 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:18,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3745 [2021-06-05 04:59:18,817 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash 96532765, now seen corresponding path program 175 times [2021-06-05 04:59:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:18,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494765185] [2021-06-05 04:59:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:18,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:18,909 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:18,909 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:18,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494765185] [2021-06-05 04:59:18,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494765185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:18,909 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919422787] [2021-06-05 04:59:18,909 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 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 [2021-06-05 04:59:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:18,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:18,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:19,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:19,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:19,010 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 16 treesize of output 12 [2021-06-05 04:59:19,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:19,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:19,013 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 15 treesize of output 11 [2021-06-05 04:59:19,014 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:19,039 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:19,039 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:19,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:19,040 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:19,078 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:19,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919422787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:19,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:19,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:19,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398040443] [2021-06-05 04:59:19,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:19,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:19,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:19,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:19,079 INFO L87 Difference]: Start difference. First operand 84 states and 173 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) [2021-06-05 04:59:19,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:19,174 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-06-05 04:59:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:19,174 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 17 [2021-06-05 04:59:19,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:19,175 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:59:19,175 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:59:19,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:19,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:59:19,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 04:59:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 04:59:19,176 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 04:59:19,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:19,176 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 04:59:19,176 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) [2021-06-05 04:59:19,176 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 04:59:19,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:19,176 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:19,176 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:19,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3762,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:19,376 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:19,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:19,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1886264480, now seen corresponding path program 176 times [2021-06-05 04:59:19,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:19,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512579019] [2021-06-05 04:59:19,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:19,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512579019] [2021-06-05 04:59:19,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512579019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:19,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248772802] [2021-06-05 04:59:19,468 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 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 [2021-06-05 04:59:19,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:19,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:19,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:19,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:19,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:19,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:19,605 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 15 treesize of output 11 [2021-06-05 04:59:19,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:19,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:19,608 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:19,642 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 04:59:19,643 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:19,645 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 [2021-06-05 04:59:19,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:19,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:19,660 INFO L518 ElimStorePlain]: Eliminatee v_prenex_99 vanished before elimination [2021-06-05 04:59:19,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:19,661 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:19,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248772802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:19,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:19,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992540573] [2021-06-05 04:59:19,741 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:19,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:19,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:19,741 INFO L87 Difference]: Start difference. First operand 84 states and 173 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) [2021-06-05 04:59:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:19,909 INFO L93 Difference]: Finished difference Result 113 states and 219 transitions. [2021-06-05 04:59:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:19,909 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 17 [2021-06-05 04:59:19,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:19,910 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:59:19,910 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:59:19,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:19,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:59:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 83. [2021-06-05 04:59:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-06-05 04:59:19,911 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-06-05 04:59:19,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:19,911 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-06-05 04:59:19,911 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) [2021-06-05 04:59:19,911 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-06-05 04:59:19,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:19,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:19,911 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:20,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3770 [2021-06-05 04:59:20,112 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash -438697037, now seen corresponding path program 177 times [2021-06-05 04:59:20,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:20,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157056179] [2021-06-05 04:59:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:20,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:20,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157056179] [2021-06-05 04:59:20,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157056179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:20,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118413708] [2021-06-05 04:59:20,217 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 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 [2021-06-05 04:59:20,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:20,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:20,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:20,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:20,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118413708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:20,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:20,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:20,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934374447] [2021-06-05 04:59:20,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:20,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:20,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:20,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:20,348 INFO L87 Difference]: Start difference. First operand 83 states and 170 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) [2021-06-05 04:59:20,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:20,451 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 04:59:20,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:20,452 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 [2021-06-05 04:59:20,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:20,452 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:59:20,452 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:59:20,452 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:59:20,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-06-05 04:59:20,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2021-06-05 04:59:20,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 04:59:20,453 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 04:59:20,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:20,453 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 04:59:20,453 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) [2021-06-05 04:59:20,453 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 04:59:20,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:20,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:20,453 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:20,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3790 [2021-06-05 04:59:20,667 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:20,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:20,667 INFO L82 PathProgramCache]: Analyzing trace with hash -810553324, now seen corresponding path program 178 times [2021-06-05 04:59:20,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:20,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114751920] [2021-06-05 04:59:20,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:20,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:20,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114751920] [2021-06-05 04:59:20,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114751920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:20,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671439601] [2021-06-05 04:59:20,780 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 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 [2021-06-05 04:59:20,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:20,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:20,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:20,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:20,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671439601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:20,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:20,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:20,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873367818] [2021-06-05 04:59:20,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:20,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:20,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:20,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:20,920 INFO L87 Difference]: Start difference. First operand 78 states and 158 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) [2021-06-05 04:59:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:21,020 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-06-05 04:59:21,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:21,021 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 [2021-06-05 04:59:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:21,021 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:59:21,021 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:59:21,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:21,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:59:21,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-06-05 04:59:21,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 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) [2021-06-05 04:59:21,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 04:59:21,022 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 04:59:21,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:21,022 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 04:59:21,022 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) [2021-06-05 04:59:21,022 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 04:59:21,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:21,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:21,022 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:21,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3793 [2021-06-05 04:59:21,223 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:21,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:21,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1662702051, now seen corresponding path program 179 times [2021-06-05 04:59:21,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:21,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774580785] [2021-06-05 04:59:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:21,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:21,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774580785] [2021-06-05 04:59:21,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774580785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:21,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064395303] [2021-06-05 04:59:21,338 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 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 [2021-06-05 04:59:21,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:21,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:21,451 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 [2021-06-05 04:59:21,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:21,455 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 [2021-06-05 04:59:21,456 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:21,458 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 [2021-06-05 04:59:21,459 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:21,461 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:21,462 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:21,464 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 17 treesize of output 13 [2021-06-05 04:59:21,465 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:21,467 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 17 treesize of output 13 [2021-06-05 04:59:21,467 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:21,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:21,492 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:21,493 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:21,493 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:21,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:21,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064395303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:21,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:21,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:21,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780011660] [2021-06-05 04:59:21,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:21,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:21,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:21,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:21,530 INFO L87 Difference]: Start difference. First operand 75 states and 151 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) [2021-06-05 04:59:21,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:21,621 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-06-05 04:59:21,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:21,622 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 [2021-06-05 04:59:21,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:21,622 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:21,622 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:59:21,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:59:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 04:59:21,623 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) [2021-06-05 04:59:21,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:21,623 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:21,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:21,623 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:21,623 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) [2021-06-05 04:59:21,623 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:21,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:21,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:21,623 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:21,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3799 [2021-06-05 04:59:21,824 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:21,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:21,824 INFO L82 PathProgramCache]: Analyzing trace with hash -920580674, now seen corresponding path program 180 times [2021-06-05 04:59:21,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:21,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351933300] [2021-06-05 04:59:21,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:21,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:21,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351933300] [2021-06-05 04:59:21,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351933300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:21,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855875882] [2021-06-05 04:59:21,947 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 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 [2021-06-05 04:59:21,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:59:21,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:21,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:21,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:22,034 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 [2021-06-05 04:59:22,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,038 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 25 treesize of output 19 [2021-06-05 04:59:22,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,052 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:22,052 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:22,053 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,053 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:22,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855875882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:22,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:22,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:22,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267195467] [2021-06-05 04:59:22,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:22,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:22,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:22,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:22,082 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:22,162 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-06-05 04:59:22,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:22,163 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 [2021-06-05 04:59:22,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:22,163 INFO L225 Difference]: With dead ends: 89 [2021-06-05 04:59:22,163 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:59:22,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:59:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2021-06-05 04:59:22,164 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) [2021-06-05 04:59:22,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:22,164 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:22,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:22,164 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:22,164 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) [2021-06-05 04:59:22,164 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:22,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:22,164 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:22,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3808 [2021-06-05 04:59:22,365 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:22,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:22,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1903148199, now seen corresponding path program 181 times [2021-06-05 04:59:22,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:22,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936376215] [2021-06-05 04:59:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:22,463 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:22,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:22,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936376215] [2021-06-05 04:59:22,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936376215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:22,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680187080] [2021-06-05 04:59:22,463 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 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 [2021-06-05 04:59:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:22,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:22,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:22,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:22,575 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 16 treesize of output 12 [2021-06-05 04:59:22,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:22,578 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 15 treesize of output 11 [2021-06-05 04:59:22,579 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:22,607 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:22,607 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:22,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:22,608 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:22,649 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:22,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680187080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:22,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:22,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:22,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705640473] [2021-06-05 04:59:22,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:22,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:22,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:22,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:22,650 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:22,794 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 04:59:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:22,794 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 [2021-06-05 04:59:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:22,795 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:59:22,795 INFO L226 Difference]: Without dead ends: 99 [2021-06-05 04:59:22,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 195.8ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:59:22,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-06-05 04:59:22,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 83. [2021-06-05 04:59:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:59:22,796 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:59:22,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:22,796 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:59:22,796 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) [2021-06-05 04:59:22,796 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:59:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:22,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:22,796 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:22,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3811 [2021-06-05 04:59:22,997 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:22,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:22,997 INFO L82 PathProgramCache]: Analyzing trace with hash 2138663832, now seen corresponding path program 182 times [2021-06-05 04:59:22,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:22,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014865449] [2021-06-05 04:59:22,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:23,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:23,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014865449] [2021-06-05 04:59:23,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014865449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:23,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63967777] [2021-06-05 04:59:23,096 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 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 [2021-06-05 04:59:23,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:23,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:23,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:23,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:23,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:23,183 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 16 treesize of output 12 [2021-06-05 04:59:23,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:23,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:23,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:23,186 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 15 treesize of output 11 [2021-06-05 04:59:23,187 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:23,189 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:23,190 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:23,192 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 [2021-06-05 04:59:23,193 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:23,224 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 04:59:23,225 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:23,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:23,225 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:23,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63967777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:23,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:23,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:23,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400756787] [2021-06-05 04:59:23,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:23,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:23,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:23,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:23,262 INFO L87 Difference]: Start difference. First operand 83 states and 169 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:23,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:23,403 INFO L93 Difference]: Finished difference Result 121 states and 237 transitions. [2021-06-05 04:59:23,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:23,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:23,403 INFO L225 Difference]: With dead ends: 121 [2021-06-05 04:59:23,403 INFO L226 Difference]: Without dead ends: 121 [2021-06-05 04:59:23,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 182.6ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:59:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-06-05 04:59:23,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 83. [2021-06-05 04:59:23,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0609756097560976) internal successors, (169), 82 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:23,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 169 transitions. [2021-06-05 04:59:23,405 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 169 transitions. Word has length 17 [2021-06-05 04:59:23,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:23,405 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 169 transitions. [2021-06-05 04:59:23,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:23,405 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 169 transitions. [2021-06-05 04:59:23,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:23,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:23,405 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:23,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3829 [2021-06-05 04:59:23,605 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:23,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:23,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1691326109, now seen corresponding path program 183 times [2021-06-05 04:59:23,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:23,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052498502] [2021-06-05 04:59:23,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:23,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:23,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:23,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052498502] [2021-06-05 04:59:23,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052498502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:23,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802655935] [2021-06-05 04:59:23,711 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 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 [2021-06-05 04:59:23,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:59:23,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:23,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:23,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:23,829 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:23,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:23,830 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 16 treesize of output 12 [2021-06-05 04:59:23,831 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:23,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:23,833 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 15 treesize of output 11 [2021-06-05 04:59:23,834 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:23,861 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:23,862 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:23,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:23,862 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:23,897 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:23,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802655935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:23,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:23,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:23,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764839349] [2021-06-05 04:59:23,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:23,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:23,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:23,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:23,898 INFO L87 Difference]: Start difference. First operand 83 states and 169 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) [2021-06-05 04:59:23,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:23,989 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 04:59:23,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:23,990 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 17 [2021-06-05 04:59:23,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:23,990 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:23,990 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:59:23,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 160.9ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:23,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:59:23,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 04:59:23,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 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) [2021-06-05 04:59:23,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 04:59:23,991 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 04:59:23,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:23,991 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 04:59:23,991 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) [2021-06-05 04:59:23,991 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 04:59:23,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:23,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:23,992 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:24,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3839,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:24,192 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:24,192 INFO L82 PathProgramCache]: Analyzing trace with hash -291471136, now seen corresponding path program 184 times [2021-06-05 04:59:24,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:24,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950447450] [2021-06-05 04:59:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:24,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:24,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950447450] [2021-06-05 04:59:24,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950447450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:24,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831190926] [2021-06-05 04:59:24,284 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 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 [2021-06-05 04:59:24,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:24,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:24,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:24,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:24,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:24,376 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 16 treesize of output 12 [2021-06-05 04:59:24,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:24,379 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 [2021-06-05 04:59:24,380 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:24,383 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 [2021-06-05 04:59:24,385 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:24,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:24,387 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 15 treesize of output 11 [2021-06-05 04:59:24,388 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:24,421 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:24,421 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:24,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:24,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:24,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831190926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:24,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:24,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:24,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53672518] [2021-06-05 04:59:24,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:24,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:24,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:24,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:24,479 INFO L87 Difference]: Start difference. First operand 79 states and 160 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) [2021-06-05 04:59:24,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:24,658 INFO L93 Difference]: Finished difference Result 98 states and 195 transitions. [2021-06-05 04:59:24,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:59:24,659 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 17 [2021-06-05 04:59:24,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:24,659 INFO L225 Difference]: With dead ends: 98 [2021-06-05 04:59:24,659 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 04:59:24,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 233.2ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 04:59:24,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2021-06-05 04:59:24,660 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) [2021-06-05 04:59:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 04:59:24,660 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 04:59:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:24,660 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 04:59:24,660 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) [2021-06-05 04:59:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 04:59:24,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:24,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:24,661 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:24,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3855 [2021-06-05 04:59:24,876 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:24,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:24,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1315402877, now seen corresponding path program 185 times [2021-06-05 04:59:24,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:24,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664931629] [2021-06-05 04:59:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:24,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:24,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664931629] [2021-06-05 04:59:24,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664931629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:24,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473366399] [2021-06-05 04:59:24,973 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 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 [2021-06-05 04:59:24,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:24,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:25,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:25,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:25,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:25,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:25,081 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 16 treesize of output 12 [2021-06-05 04:59:25,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:25,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:25,084 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 15 treesize of output 11 [2021-06-05 04:59:25,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:25,109 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:25,109 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:25,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:25,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:25,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473366399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:25,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:25,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709696593] [2021-06-05 04:59:25,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:25,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:25,153 INFO L87 Difference]: Start difference. First operand 77 states and 155 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) [2021-06-05 04:59:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:25,306 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 04:59:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:25,307 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 [2021-06-05 04:59:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:25,307 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:59:25,307 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:25,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 221.0ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:25,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 04:59:25,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:25,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 04:59:25,308 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 04:59:25,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:25,308 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 04:59:25,308 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) [2021-06-05 04:59:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 04:59:25,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:25,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:25,308 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:25,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3868,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:25,509 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1568558142, now seen corresponding path program 186 times [2021-06-05 04:59:25,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:25,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344561821] [2021-06-05 04:59:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:25,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:25,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344561821] [2021-06-05 04:59:25,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344561821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:25,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317414185] [2021-06-05 04:59:25,604 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 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 [2021-06-05 04:59:25,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:59:25,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:25,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:25,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:25,724 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 [2021-06-05 04:59:25,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:25,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:25,728 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 15 treesize of output 11 [2021-06-05 04:59:25,729 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:25,767 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 04:59:25,770 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 [2021-06-05 04:59:25,770 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:25,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:25,784 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:25,784 INFO L518 ElimStorePlain]: Eliminatee v_prenex_106 vanished before elimination [2021-06-05 04:59:25,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:25,785 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:25,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:25,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317414185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:25,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:25,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:25,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977432148] [2021-06-05 04:59:25,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:25,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:25,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:25,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:25,832 INFO L87 Difference]: Start difference. First operand 84 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:25,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:25,995 INFO L93 Difference]: Finished difference Result 112 states and 220 transitions. [2021-06-05 04:59:25,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:25,996 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:25,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:25,996 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:59:25,996 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:59:25,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:25,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:59:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 84. [2021-06-05 04:59:25,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 04:59:25,997 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 04:59:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:25,997 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 04:59:25,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 04:59:25,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:25,997 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:25,997 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:26,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3878 [2021-06-05 04:59:26,213 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:26,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2015895865, now seen corresponding path program 187 times [2021-06-05 04:59:26,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:26,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837784424] [2021-06-05 04:59:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:26,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:26,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:26,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:26,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837784424] [2021-06-05 04:59:26,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837784424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:26,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948573170] [2021-06-05 04:59:26,321 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 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 [2021-06-05 04:59:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:26,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:26,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:26,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:59:26,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:26,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:26,436 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 [2021-06-05 04:59:26,436 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:26,461 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:26,461 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:26,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:26,462 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:26,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948573170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:26,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:26,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:26,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378704394] [2021-06-05 04:59:26,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:26,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:26,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:26,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:26,496 INFO L87 Difference]: Start difference. First operand 84 states and 173 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) [2021-06-05 04:59:26,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:26,604 INFO L93 Difference]: Finished difference Result 107 states and 209 transitions. [2021-06-05 04:59:26,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:26,604 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 17 [2021-06-05 04:59:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:26,604 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:59:26,604 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:59:26,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:26,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:59:26,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-06-05 04:59:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:26,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 04:59:26,605 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 04:59:26,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:26,605 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 04:59:26,606 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) [2021-06-05 04:59:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 04:59:26,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:26,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:26,606 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:26,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3889,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:26,823 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:26,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:26,823 INFO L82 PathProgramCache]: Analyzing trace with hash 296274186, now seen corresponding path program 188 times [2021-06-05 04:59:26,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:26,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690734975] [2021-06-05 04:59:26,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:26,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:26,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:26,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690734975] [2021-06-05 04:59:26,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690734975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:26,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543099019] [2021-06-05 04:59:26,920 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 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 [2021-06-05 04:59:26,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:26,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:26,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:26,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:27,036 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 [2021-06-05 04:59:27,037 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:27,040 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 15 treesize of output 11 [2021-06-05 04:59:27,040 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,079 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 04:59:27,081 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 [2021-06-05 04:59:27,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:27,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:27,096 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:27,096 INFO L518 ElimStorePlain]: Eliminatee v_prenex_110 vanished before elimination [2021-06-05 04:59:27,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:27,097 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:27,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:27,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543099019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:27,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:27,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:27,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841754604] [2021-06-05 04:59:27,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:27,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:27,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:27,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:27,163 INFO L87 Difference]: Start difference. First operand 84 states and 173 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) [2021-06-05 04:59:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:27,330 INFO L93 Difference]: Finished difference Result 114 states and 221 transitions. [2021-06-05 04:59:27,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:27,330 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 17 [2021-06-05 04:59:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:27,330 INFO L225 Difference]: With dead ends: 114 [2021-06-05 04:59:27,330 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:59:27,330 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 246.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:27,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:59:27,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 83. [2021-06-05 04:59:27,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.073170731707317) internal successors, (170), 82 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:27,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 170 transitions. [2021-06-05 04:59:27,331 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 170 transitions. Word has length 17 [2021-06-05 04:59:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:27,331 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 170 transitions. [2021-06-05 04:59:27,331 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) [2021-06-05 04:59:27,332 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 170 transitions. [2021-06-05 04:59:27,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:27,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:27,332 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:27,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3897,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:27,532 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:27,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:27,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1743841629, now seen corresponding path program 189 times [2021-06-05 04:59:27,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:27,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284683880] [2021-06-05 04:59:27,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:27,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284683880] [2021-06-05 04:59:27,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284683880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606299644] [2021-06-05 04:59:27,642 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 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 [2021-06-05 04:59:27,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:59:27,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:27,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:27,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:27,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606299644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:27,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:27,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:27,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965609785] [2021-06-05 04:59:27,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:27,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:27,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:27,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:27,749 INFO L87 Difference]: Start difference. First operand 83 states and 170 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) [2021-06-05 04:59:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:27,840 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 04:59:27,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:27,840 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 [2021-06-05 04:59:27,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:27,840 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:59:27,840 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:59:27,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 172.2ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:27,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:59:27,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 78. [2021-06-05 04:59:27,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2021-06-05 04:59:27,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 04:59:27,841 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 04:59:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:27,841 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 04:59:27,842 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) [2021-06-05 04:59:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 04:59:27,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:27,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:27,842 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:28,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3911 [2021-06-05 04:59:28,042 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:28,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:28,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1371985342, now seen corresponding path program 190 times [2021-06-05 04:59:28,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:28,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271865893] [2021-06-05 04:59:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:28,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:28,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:28,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271865893] [2021-06-05 04:59:28,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271865893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:28,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025276314] [2021-06-05 04:59:28,150 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 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 [2021-06-05 04:59:28,174 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:28,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:28,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:28,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:28,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025276314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:28,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:28,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:28,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617302875] [2021-06-05 04:59:28,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:28,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:28,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:28,288 INFO L87 Difference]: Start difference. First operand 78 states and 158 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) [2021-06-05 04:59:28,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:28,400 INFO L93 Difference]: Finished difference Result 85 states and 168 transitions. [2021-06-05 04:59:28,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:28,401 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 [2021-06-05 04:59:28,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:28,401 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:59:28,401 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:59:28,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:59:28,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2021-06-05 04:59:28,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 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) [2021-06-05 04:59:28,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 04:59:28,402 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 04:59:28,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:28,402 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 04:59:28,402 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) [2021-06-05 04:59:28,402 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 04:59:28,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:28,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:28,402 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:28,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3914,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:28,603 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:28,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:28,603 INFO L82 PathProgramCache]: Analyzing trace with hash -275167079, now seen corresponding path program 191 times [2021-06-05 04:59:28,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:28,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655898769] [2021-06-05 04:59:28,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:28,690 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:28,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655898769] [2021-06-05 04:59:28,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655898769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:28,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811515518] [2021-06-05 04:59:28,691 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 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 [2021-06-05 04:59:28,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:59:28,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:28,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:28,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:28,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:28,834 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 15 treesize of output 11 [2021-06-05 04:59:28,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:28,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:28,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:28,838 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 16 treesize of output 12 [2021-06-05 04:59:28,839 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:28,841 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 [2021-06-05 04:59:28,842 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:28,844 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 [2021-06-05 04:59:28,845 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:28,886 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 04:59:28,886 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:28,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:28,887 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 04:59:28,930 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:28,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811515518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:28,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:28,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:28,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519757647] [2021-06-05 04:59:28,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:28,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:28,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:28,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:28,931 INFO L87 Difference]: Start difference. First operand 76 states and 153 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:29,145 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-06-05 04:59:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:59:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 04:59:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:29,145 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:59:29,146 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:59:29,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 263.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:59:29,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:59:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-06-05 04:59:29,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 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) [2021-06-05 04:59:29,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 04:59:29,147 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 04:59:29,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:29,147 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 04:59:29,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:29,147 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 04:59:29,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:29,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:29,147 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:29,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3920 [2021-06-05 04:59:29,347 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash -528322344, now seen corresponding path program 192 times [2021-06-05 04:59:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329052721] [2021-06-05 04:59:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:29,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:29,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329052721] [2021-06-05 04:59:29,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329052721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:29,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17946032] [2021-06-05 04:59:29,434 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 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 [2021-06-05 04:59:29,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:59:29,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:29,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:29,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:29,616 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 [2021-06-05 04:59:29,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:29,620 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 [2021-06-05 04:59:29,621 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:29,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:29,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:29,624 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 16 treesize of output 12 [2021-06-05 04:59:29,625 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:29,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:29,628 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 15 treesize of output 11 [2021-06-05 04:59:29,628 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:29,688 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-06-05 04:59:29,689 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:29,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:59:29,690 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-06-05 04:59:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:29,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17946032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:29,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:29,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:29,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44405346] [2021-06-05 04:59:29,737 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:29,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:29,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:29,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:29,737 INFO L87 Difference]: Start difference. First operand 85 states and 177 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) [2021-06-05 04:59:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:29,915 INFO L93 Difference]: Finished difference Result 115 states and 227 transitions. [2021-06-05 04:59:29,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:29,915 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 [2021-06-05 04:59:29,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:29,915 INFO L225 Difference]: With dead ends: 115 [2021-06-05 04:59:29,915 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:59:29,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 259.7ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:59:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 85. [2021-06-05 04:59:29,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 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) [2021-06-05 04:59:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 04:59:29,916 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 04:59:29,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:29,916 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 04:59:29,916 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) [2021-06-05 04:59:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 04:59:29,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:29,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:29,917 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:30,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3932,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:30,117 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:30,117 INFO L82 PathProgramCache]: Analyzing trace with hash -975660067, now seen corresponding path program 193 times [2021-06-05 04:59:30,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:30,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974959671] [2021-06-05 04:59:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:30,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974959671] [2021-06-05 04:59:30,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974959671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:30,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502417923] [2021-06-05 04:59:30,204 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 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 [2021-06-05 04:59:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:30,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:30,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:30,342 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:30,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:59:30,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:30,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:30,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:30,347 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 [2021-06-05 04:59:30,347 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:30,350 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 [2021-06-05 04:59:30,350 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:30,353 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 [2021-06-05 04:59:30,353 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:30,394 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 04:59:30,394 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:30,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:30,395 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 04:59:30,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:30,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502417923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:30,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:30,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:30,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083843885] [2021-06-05 04:59:30,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:30,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:30,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:30,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:30,431 INFO L87 Difference]: Start difference. First operand 85 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) [2021-06-05 04:59:30,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:30,523 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-06-05 04:59:30,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:30,523 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 [2021-06-05 04:59:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:30,523 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:59:30,523 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:59:30,524 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 170.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:59:30,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-06-05 04:59:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.107142857142857) internal successors, (177), 84 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) [2021-06-05 04:59:30,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2021-06-05 04:59:30,525 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 17 [2021-06-05 04:59:30,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:30,525 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2021-06-05 04:59:30,525 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) [2021-06-05 04:59:30,525 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2021-06-05 04:59:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:30,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:30,525 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:30,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3951 [2021-06-05 04:59:30,725 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:30,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:30,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1336509984, now seen corresponding path program 194 times [2021-06-05 04:59:30,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:30,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099057507] [2021-06-05 04:59:30,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:30,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099057507] [2021-06-05 04:59:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099057507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533606100] [2021-06-05 04:59:30,817 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 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 [2021-06-05 04:59:30,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:30,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:30,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:30,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:30,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:30,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:30,997 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 15 treesize of output 11 [2021-06-05 04:59:30,998 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,001 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:31,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:59:31,002 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,004 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 [2021-06-05 04:59:31,005 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,008 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 [2021-06-05 04:59:31,008 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:31,060 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 04:59:31,060 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:31,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:59:31,061 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 04:59:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:31,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533606100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:31,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:31,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:31,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13357446] [2021-06-05 04:59:31,132 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:31,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:31,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:31,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:31,133 INFO L87 Difference]: Start difference. First operand 85 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) [2021-06-05 04:59:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:31,437 INFO L93 Difference]: Finished difference Result 117 states and 228 transitions. [2021-06-05 04:59:31,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:59:31,437 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 [2021-06-05 04:59:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:31,437 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:59:31,437 INFO L226 Difference]: Without dead ends: 115 [2021-06-05 04:59:31,437 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 04:59:31,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-06-05 04:59:31,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 84. [2021-06-05 04:59:31,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 04:59:31,438 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 04:59:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:31,438 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 04:59:31,439 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) [2021-06-05 04:59:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 04:59:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:31,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:31,439 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:31,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3961,198 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:31,639 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:31,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:31,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1510889869, now seen corresponding path program 195 times [2021-06-05 04:59:31,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:31,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536589649] [2021-06-05 04:59:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:31,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:31,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536589649] [2021-06-05 04:59:31,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536589649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:31,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844926326] [2021-06-05 04:59:31,741 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 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 [2021-06-05 04:59:31,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:31,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:31,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:31,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:31,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:31,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844926326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:31,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:31,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:31,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285499429] [2021-06-05 04:59:31,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:31,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:31,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:31,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:31,876 INFO L87 Difference]: Start difference. First operand 84 states and 174 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) [2021-06-05 04:59:31,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:31,978 INFO L93 Difference]: Finished difference Result 104 states and 210 transitions. [2021-06-05 04:59:31,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:31,978 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 [2021-06-05 04:59:31,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:31,979 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:59:31,979 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:31,979 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 04:59:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0963855421686746) internal successors, (174), 83 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 174 transitions. [2021-06-05 04:59:31,980 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 174 transitions. Word has length 17 [2021-06-05 04:59:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:31,980 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 174 transitions. [2021-06-05 04:59:31,980 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) [2021-06-05 04:59:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 174 transitions. [2021-06-05 04:59:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:31,980 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:31,980 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:32,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3983,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:32,181 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:32,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1882746156, now seen corresponding path program 196 times [2021-06-05 04:59:32,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:32,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875632618] [2021-06-05 04:59:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:32,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:32,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875632618] [2021-06-05 04:59:32,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875632618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:32,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407077080] [2021-06-05 04:59:32,277 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 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 [2021-06-05 04:59:32,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:32,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:32,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:32,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407077080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:32,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:32,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:32,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683341973] [2021-06-05 04:59:32,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:32,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:32,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:32,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:32,437 INFO L87 Difference]: Start difference. First operand 84 states and 174 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) [2021-06-05 04:59:32,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:32,594 INFO L93 Difference]: Finished difference Result 96 states and 192 transitions. [2021-06-05 04:59:32,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:32,594 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 [2021-06-05 04:59:32,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:32,595 INFO L225 Difference]: With dead ends: 96 [2021-06-05 04:59:32,595 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:59:32,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 231.1ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:32,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:59:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 83. [2021-06-05 04:59:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0853658536585367) internal successors, (171), 82 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 171 transitions. [2021-06-05 04:59:32,596 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 171 transitions. Word has length 17 [2021-06-05 04:59:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:32,596 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 171 transitions. [2021-06-05 04:59:32,596 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) [2021-06-05 04:59:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 171 transitions. [2021-06-05 04:59:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:32,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:32,596 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:32,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3986 [2021-06-05 04:59:32,797 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash -923144547, now seen corresponding path program 197 times [2021-06-05 04:59:32,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:32,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385408127] [2021-06-05 04:59:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:32,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:32,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:32,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385408127] [2021-06-05 04:59:32,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385408127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:32,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775819418] [2021-06-05 04:59:32,886 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 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 [2021-06-05 04:59:32,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:32,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:32,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:32,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:32,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775819418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:32,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:32,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:32,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442452154] [2021-06-05 04:59:32,998 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:32,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:32,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:32,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:32,999 INFO L87 Difference]: Start difference. First operand 83 states and 171 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) [2021-06-05 04:59:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:33,088 INFO L93 Difference]: Finished difference Result 97 states and 195 transitions. [2021-06-05 04:59:33,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:33,088 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 [2021-06-05 04:59:33,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:33,089 INFO L225 Difference]: With dead ends: 97 [2021-06-05 04:59:33,089 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 04:59:33,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:33,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 04:59:33,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 78. [2021-06-05 04:59:33,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.064935064935065) internal successors, (159), 77 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:33,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 159 transitions. [2021-06-05 04:59:33,090 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 159 transitions. Word has length 17 [2021-06-05 04:59:33,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:33,090 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 159 transitions. [2021-06-05 04:59:33,090 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) [2021-06-05 04:59:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 159 transitions. [2021-06-05 04:59:33,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:33,090 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:33,090 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:33,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3992,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:33,291 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:33,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:33,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1399528608, now seen corresponding path program 198 times [2021-06-05 04:59:33,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:33,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96922901] [2021-06-05 04:59:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:33,381 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:33,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:33,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96922901] [2021-06-05 04:59:33,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96922901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:33,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320112613] [2021-06-05 04:59:33,382 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 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 [2021-06-05 04:59:33,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:33,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:33,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:33,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:33,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320112613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:33,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:33,526 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:33,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743192753] [2021-06-05 04:59:33,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:33,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:33,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:33,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:33,526 INFO L87 Difference]: Start difference. First operand 78 states and 159 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) [2021-06-05 04:59:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:33,649 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-06-05 04:59:33,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:33,650 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 [2021-06-05 04:59:33,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:33,650 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:33,650 INFO L226 Difference]: Without dead ends: 81 [2021-06-05 04:59:33,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:33,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-06-05 04:59:33,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2021-06-05 04:59:33,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2021-06-05 04:59:33,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 04:59:33,651 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 04:59:33,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:33,651 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 04:59:33,651 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) [2021-06-05 04:59:33,651 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 04:59:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:33,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:33,651 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:33,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3995,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:33,852 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:33,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1296800747, now seen corresponding path program 199 times [2021-06-05 04:59:33,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:33,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578751418] [2021-06-05 04:59:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:33,952 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:33,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578751418] [2021-06-05 04:59:33,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578751418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:33,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444309473] [2021-06-05 04:59:33,952 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 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 [2021-06-05 04:59:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:33,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:33,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:34,071 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 [2021-06-05 04:59:34,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,075 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 [2021-06-05 04:59:34,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,078 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 [2021-06-05 04:59:34,079 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,082 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 17 treesize of output 13 [2021-06-05 04:59:34,083 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,085 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:34,086 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,088 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 17 treesize of output 13 [2021-06-05 04:59:34,089 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:34,113 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:34,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:34,115 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444309473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:34,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:34,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:34,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699954711] [2021-06-05 04:59:34,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:34,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:34,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:34,152 INFO L87 Difference]: Start difference. First operand 78 states and 158 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) [2021-06-05 04:59:34,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:34,246 INFO L93 Difference]: Finished difference Result 91 states and 178 transitions. [2021-06-05 04:59:34,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:34,246 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 [2021-06-05 04:59:34,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:34,246 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:59:34,246 INFO L226 Difference]: Without dead ends: 82 [2021-06-05 04:59:34,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 189.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:34,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-06-05 04:59:34,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2021-06-05 04:59:34,247 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) [2021-06-05 04:59:34,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:34,247 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:34,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:34,247 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:34,248 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) [2021-06-05 04:59:34,248 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:34,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:34,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:34,248 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:34,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4001 [2021-06-05 04:59:34,448 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:34,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:34,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1467240342, now seen corresponding path program 200 times [2021-06-05 04:59:34,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:34,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819180900] [2021-06-05 04:59:34,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:34,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:34,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:34,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819180900] [2021-06-05 04:59:34,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819180900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:34,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091873247] [2021-06-05 04:59:34,548 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 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 [2021-06-05 04:59:34,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:34,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:34,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:34,635 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 25 treesize of output 19 [2021-06-05 04:59:34,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,638 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 [2021-06-05 04:59:34,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:34,645 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:34,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:34,646 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:34,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091873247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:34,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:34,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:34,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257044662] [2021-06-05 04:59:34,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:34,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:34,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:34,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:34,668 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:34,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:34,741 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 04:59:34,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:34,741 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 [2021-06-05 04:59:34,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:34,742 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:59:34,742 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:59:34,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 153.7ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:34,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:59:34,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 78. [2021-06-05 04:59:34,742 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) [2021-06-05 04:59:34,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:34,743 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:34,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:34,743 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:34,743 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) [2021-06-05 04:59:34,743 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:34,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:34,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:34,743 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:34,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4010 [2021-06-05 04:59:34,953 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1862062545, now seen corresponding path program 201 times [2021-06-05 04:59:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:34,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845964646] [2021-06-05 04:59:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:35,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:35,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845964646] [2021-06-05 04:59:35,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845964646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:35,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890517825] [2021-06-05 04:59:35,059 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 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 [2021-06-05 04:59:35,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:59:35,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:35,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:35,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:35,187 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 17 treesize of output 13 [2021-06-05 04:59:35,188 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,190 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 [2021-06-05 04:59:35,191 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,193 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:35,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,196 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 [2021-06-05 04:59:35,197 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,199 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 [2021-06-05 04:59:35,200 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,202 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 17 treesize of output 13 [2021-06-05 04:59:35,202 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:35,227 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:35,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:35,228 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:35,265 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:35,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890517825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:35,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:35,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:35,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028102317] [2021-06-05 04:59:35,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:35,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:35,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:35,266 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:35,384 INFO L93 Difference]: Finished difference Result 86 states and 169 transitions. [2021-06-05 04:59:35,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:35,384 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 [2021-06-05 04:59:35,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:35,385 INFO L225 Difference]: With dead ends: 86 [2021-06-05 04:59:35,385 INFO L226 Difference]: Without dead ends: 80 [2021-06-05 04:59:35,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 225.5ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:35,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-06-05 04:59:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-06-05 04:59:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 04:59:35,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 04:59:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:35,386 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 04:59:35,386 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) [2021-06-05 04:59:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 04:59:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:35,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:35,386 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:35,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4013,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:35,586 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:35,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:35,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1119941168, now seen corresponding path program 202 times [2021-06-05 04:59:35,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:35,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692947473] [2021-06-05 04:59:35,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:35,693 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:35,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:35,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692947473] [2021-06-05 04:59:35,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692947473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:35,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973909001] [2021-06-05 04:59:35,693 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 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 [2021-06-05 04:59:35,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:35,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:35,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:35,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:35,780 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 [2021-06-05 04:59:35,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,783 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 25 treesize of output 19 [2021-06-05 04:59:35,784 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:35,791 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:35,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:35,792 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:35,815 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:35,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973909001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:35,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:35,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:35,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268065542] [2021-06-05 04:59:35,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:35,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:35,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:35,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:35,816 INFO L87 Difference]: Start difference. First operand 79 states and 159 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) [2021-06-05 04:59:35,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:35,913 INFO L93 Difference]: Finished difference Result 103 states and 207 transitions. [2021-06-05 04:59:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:35,914 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 [2021-06-05 04:59:35,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:35,914 INFO L225 Difference]: With dead ends: 103 [2021-06-05 04:59:35,914 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:59:35,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 167.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:35,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:59:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 79. [2021-06-05 04:59:35,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:35,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 04:59:35,915 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 04:59:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:35,915 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 04:59:35,915 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) [2021-06-05 04:59:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 04:59:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:35,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:35,915 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:36,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4022 [2021-06-05 04:59:36,116 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:36,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:36,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2102508693, now seen corresponding path program 203 times [2021-06-05 04:59:36,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:36,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487703966] [2021-06-05 04:59:36,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:36,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487703966] [2021-06-05 04:59:36,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487703966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:36,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057686443] [2021-06-05 04:59:36,203 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 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 [2021-06-05 04:59:36,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:36,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:36,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:36,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,352 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 [2021-06-05 04:59:36,353 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:36,356 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 15 treesize of output 11 [2021-06-05 04:59:36,356 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:36,385 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:36,385 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:36,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:36,386 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:36,429 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:36,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057686443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:36,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:36,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:36,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65007969] [2021-06-05 04:59:36,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:36,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:36,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:36,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:36,430 INFO L87 Difference]: Start difference. First operand 79 states and 159 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:36,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:36,606 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 04:59:36,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:36,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 04:59:36,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:36,607 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:59:36,607 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:36,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 04:59:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:36,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 04:59:36,608 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 04:59:36,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:36,608 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 04:59:36,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:36,608 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 04:59:36,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:36,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:36,609 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:36,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4025,207 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:36,824 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:36,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1939303338, now seen corresponding path program 204 times [2021-06-05 04:59:36,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:36,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250440525] [2021-06-05 04:59:36,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:36,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:36,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250440525] [2021-06-05 04:59:36,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250440525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:36,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835886008] [2021-06-05 04:59:36,916 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 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 [2021-06-05 04:59:36,943 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:59:36,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:36,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:37,015 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 [2021-06-05 04:59:37,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,018 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 [2021-06-05 04:59:37,019 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:37,023 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:37,023 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 15 treesize of output 11 [2021-06-05 04:59:37,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:37,026 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 16 treesize of output 12 [2021-06-05 04:59:37,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,067 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:37,067 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:37,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:37,068 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:37,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:37,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835886008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:37,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:37,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:37,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191723458] [2021-06-05 04:59:37,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:37,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:37,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:37,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:37,107 INFO L87 Difference]: Start difference. First operand 84 states and 171 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) [2021-06-05 04:59:37,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:37,215 INFO L93 Difference]: Finished difference Result 117 states and 229 transitions. [2021-06-05 04:59:37,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:37,215 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 [2021-06-05 04:59:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:37,215 INFO L225 Difference]: With dead ends: 117 [2021-06-05 04:59:37,215 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 04:59:37,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 156.7ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 04:59:37,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 84. [2021-06-05 04:59:37,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:37,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 04:59:37,216 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 04:59:37,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:37,216 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 04:59:37,217 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) [2021-06-05 04:59:37,217 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 04:59:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:37,217 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:37,217 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:37,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4043 [2021-06-05 04:59:37,417 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:37,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:37,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1491965615, now seen corresponding path program 205 times [2021-06-05 04:59:37,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:37,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313395944] [2021-06-05 04:59:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:37,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:37,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313395944] [2021-06-05 04:59:37,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313395944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:37,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490976628] [2021-06-05 04:59:37,513 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 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 [2021-06-05 04:59:37,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:37,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:37,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:37,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:37,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:37,643 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 [2021-06-05 04:59:37,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:37,646 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 [2021-06-05 04:59:37,646 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:37,674 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:37,675 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:37,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:37,675 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:37,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490976628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:37,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:37,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734173934] [2021-06-05 04:59:37,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:37,712 INFO L87 Difference]: Start difference. First operand 84 states and 171 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) [2021-06-05 04:59:37,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:37,882 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 04:59:37,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:37,883 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 [2021-06-05 04:59:37,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:37,883 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:59:37,883 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:59:37,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 238.1ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:37,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:59:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 04:59:37,884 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) [2021-06-05 04:59:37,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 04:59:37,884 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 04:59:37,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:37,884 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 04:59:37,884 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) [2021-06-05 04:59:37,884 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 04:59:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:37,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:37,884 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:38,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4053 [2021-06-05 04:59:38,085 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash -490831630, now seen corresponding path program 206 times [2021-06-05 04:59:38,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:38,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406507778] [2021-06-05 04:59:38,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:38,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:38,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406507778] [2021-06-05 04:59:38,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406507778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:38,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452364774] [2021-06-05 04:59:38,180 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 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 [2021-06-05 04:59:38,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:38,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:38,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:38,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:38,288 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 [2021-06-05 04:59:38,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:38,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:38,292 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 15 treesize of output 11 [2021-06-05 04:59:38,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:38,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:38,295 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 16 treesize of output 12 [2021-06-05 04:59:38,296 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,298 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 [2021-06-05 04:59:38,298 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:38,331 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:38,332 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:38,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:38,332 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:38,394 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:38,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452364774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:38,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:38,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:38,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979555892] [2021-06-05 04:59:38,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:38,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:38,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:38,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:38,395 INFO L87 Difference]: Start difference. First operand 80 states and 162 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) [2021-06-05 04:59:38,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:38,572 INFO L93 Difference]: Finished difference Result 94 states and 187 transitions. [2021-06-05 04:59:38,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:59:38,572 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 [2021-06-05 04:59:38,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:38,572 INFO L225 Difference]: With dead ends: 94 [2021-06-05 04:59:38,572 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:59:38,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 245.2ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:59:38,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:59:38,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 77. [2021-06-05 04:59:38,573 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) [2021-06-05 04:59:38,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 04:59:38,574 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 04:59:38,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:38,574 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 04:59:38,574 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) [2021-06-05 04:59:38,574 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 04:59:38,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:38,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:38,574 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:38,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4069,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:38,774 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:38,775 INFO L82 PathProgramCache]: Analyzing trace with hash -821826747, now seen corresponding path program 207 times [2021-06-05 04:59:38,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:38,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004999575] [2021-06-05 04:59:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:38,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:38,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:38,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004999575] [2021-06-05 04:59:38,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004999575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:38,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004062511] [2021-06-05 04:59:38,898 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 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 [2021-06-05 04:59:38,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 04:59:38,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:38,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:38,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:39,012 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 [2021-06-05 04:59:39,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,016 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 17 treesize of output 13 [2021-06-05 04:59:39,017 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,020 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:39,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,023 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 [2021-06-05 04:59:39,024 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,027 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 17 treesize of output 13 [2021-06-05 04:59:39,027 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,029 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 [2021-06-05 04:59:39,030 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:39,071 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:39,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:39,072 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:39,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004062511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:39,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:39,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:39,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082479738] [2021-06-05 04:59:39,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:39,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:39,117 INFO L87 Difference]: Start difference. First operand 77 states and 155 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) [2021-06-05 04:59:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:39,190 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-06-05 04:59:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:39,190 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 [2021-06-05 04:59:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:39,190 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:59:39,190 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:59:39,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 195.0ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:59:39,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-06-05 04:59:39,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:39,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 04:59:39,191 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 04:59:39,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:39,191 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 04:59:39,191 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) [2021-06-05 04:59:39,191 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 04:59:39,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:39,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:39,192 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:39,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4081,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:39,392 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:39,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:39,392 INFO L82 PathProgramCache]: Analyzing trace with hash -79705370, now seen corresponding path program 208 times [2021-06-05 04:59:39,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:39,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781598893] [2021-06-05 04:59:39,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:39,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:39,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781598893] [2021-06-05 04:59:39,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781598893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:39,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915187267] [2021-06-05 04:59:39,507 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 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 [2021-06-05 04:59:39,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:39,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:39,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:39,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:39,590 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 25 treesize of output 19 [2021-06-05 04:59:39,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,593 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 [2021-06-05 04:59:39,594 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:39,601 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:39,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:39,601 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915187267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:39,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:39,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:39,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754603876] [2021-06-05 04:59:39,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:39,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:39,625 INFO L87 Difference]: Start difference. First operand 79 states and 159 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) [2021-06-05 04:59:39,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:39,700 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 04:59:39,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:39,701 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 [2021-06-05 04:59:39,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:39,701 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:39,701 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:59:39,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 162.3ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:39,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:59:39,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 04:59:39,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 04:59:39,702 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 04:59:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:39,702 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 04:59:39,702 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) [2021-06-05 04:59:39,702 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 04:59:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:39,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:39,702 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:39,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4090,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:39,903 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1062272895, now seen corresponding path program 209 times [2021-06-05 04:59:39,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:39,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012467172] [2021-06-05 04:59:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:39,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:39,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012467172] [2021-06-05 04:59:39,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012467172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:39,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585056565] [2021-06-05 04:59:39,997 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 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 [2021-06-05 04:59:40,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:40,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:40,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:40,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:40,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:40,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:40,109 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 16 treesize of output 12 [2021-06-05 04:59:40,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:40,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:40,112 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 15 treesize of output 11 [2021-06-05 04:59:40,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:40,141 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:40,141 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:40,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:40,142 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:40,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585056565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:40,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:40,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:40,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632622876] [2021-06-05 04:59:40,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:40,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:40,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:40,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:40,184 INFO L87 Difference]: Start difference. First operand 79 states and 159 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) [2021-06-05 04:59:40,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:40,345 INFO L93 Difference]: Finished difference Result 107 states and 206 transitions. [2021-06-05 04:59:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:40,346 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 [2021-06-05 04:59:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:40,346 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:59:40,346 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:40,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 213.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:40,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 04:59:40,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:40,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 04:59:40,347 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 04:59:40,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:40,347 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 04:59:40,347 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) [2021-06-05 04:59:40,347 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 04:59:40,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:40,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:40,347 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:40,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4093,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:40,548 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:40,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:40,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1315428160, now seen corresponding path program 210 times [2021-06-05 04:59:40,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:40,548 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261270036] [2021-06-05 04:59:40,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:40,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:40,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:40,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261270036] [2021-06-05 04:59:40,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261270036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:40,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038286652] [2021-06-05 04:59:40,686 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 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 [2021-06-05 04:59:40,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:40,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:40,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:40,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:40,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:40,769 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 16 treesize of output 12 [2021-06-05 04:59:40,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:40,771 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 8 treesize of output 6 [2021-06-05 04:59:40,772 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:40,774 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 [2021-06-05 04:59:40,775 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:40,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:40,778 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 15 treesize of output 11 [2021-06-05 04:59:40,779 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:40,812 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:40,812 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:40,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:40,813 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:40,848 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:40,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038286652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:40,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:40,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:40,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254444975] [2021-06-05 04:59:40,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:40,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:40,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:40,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:40,849 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:40,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:40,946 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 04:59:40,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:40,946 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:40,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:40,946 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:59:40,946 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:59:40,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:59:40,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 04:59:40,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 04:59:40,948 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 04:59:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:40,948 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 04:59:40,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 04:59:40,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:40,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:40,948 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:41,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4111 [2021-06-05 04:59:41,148 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:41,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:41,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1762765883, now seen corresponding path program 211 times [2021-06-05 04:59:41,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:41,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405388049] [2021-06-05 04:59:41,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:41,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:41,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405388049] [2021-06-05 04:59:41,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405388049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:41,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949210178] [2021-06-05 04:59:41,255 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 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 [2021-06-05 04:59:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:41,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:41,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:41,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:41,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:41,370 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 15 treesize of output 11 [2021-06-05 04:59:41,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:41,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:41,375 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 16 treesize of output 12 [2021-06-05 04:59:41,375 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:41,409 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:41,409 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:41,410 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:41,410 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:41,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949210178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:41,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:41,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573050477] [2021-06-05 04:59:41,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:41,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:41,446 INFO L87 Difference]: Start difference. First operand 84 states and 171 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) [2021-06-05 04:59:41,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:41,613 INFO L93 Difference]: Finished difference Result 92 states and 185 transitions. [2021-06-05 04:59:41,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:41,613 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 17 [2021-06-05 04:59:41,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:41,614 INFO L225 Difference]: With dead ends: 92 [2021-06-05 04:59:41,614 INFO L226 Difference]: Without dead ends: 92 [2021-06-05 04:59:41,614 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-06-05 04:59:41,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2021-06-05 04:59:41,614 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) [2021-06-05 04:59:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 04:59:41,615 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 04:59:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:41,615 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 04:59:41,615 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) [2021-06-05 04:59:41,615 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 04:59:41,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:41,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:41,615 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:41,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4121 [2021-06-05 04:59:41,816 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:41,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:41,816 INFO L82 PathProgramCache]: Analyzing trace with hash 549404168, now seen corresponding path program 212 times [2021-06-05 04:59:41,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:41,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809028964] [2021-06-05 04:59:41,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:41,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:41,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809028964] [2021-06-05 04:59:41,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809028964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982368346] [2021-06-05 04:59:41,910 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 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 [2021-06-05 04:59:41,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:41,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:41,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:41,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:42,006 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 [2021-06-05 04:59:42,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:42,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:42,010 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:42,010 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 15 treesize of output 11 [2021-06-05 04:59:42,011 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:42,013 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:42,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:42,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:42,015 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 16 treesize of output 12 [2021-06-05 04:59:42,016 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:42,047 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 04:59:42,047 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:42,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:42,048 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:42,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:42,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982368346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:42,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:42,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:42,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351139555] [2021-06-05 04:59:42,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:42,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:42,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:42,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:42,104 INFO L87 Difference]: Start difference. First operand 80 states and 162 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) [2021-06-05 04:59:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:42,257 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-06-05 04:59:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:42,258 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 17 [2021-06-05 04:59:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:42,258 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:59:42,258 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:59:42,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:59:42,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-06-05 04:59:42,259 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) [2021-06-05 04:59:42,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:42,259 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:42,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:42,259 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:42,259 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) [2021-06-05 04:59:42,259 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:42,259 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:42,259 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:42,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4137,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:42,460 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash -474527573, now seen corresponding path program 213 times [2021-06-05 04:59:42,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:42,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159817955] [2021-06-05 04:59:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:42,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:42,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159817955] [2021-06-05 04:59:42,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159817955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:42,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508583521] [2021-06-05 04:59:42,558 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 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 [2021-06-05 04:59:42,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:42,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:42,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:42,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:42,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:42,666 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 16 treesize of output 12 [2021-06-05 04:59:42,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:42,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:42,669 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 15 treesize of output 11 [2021-06-05 04:59:42,670 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:42,700 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:42,700 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:42,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:42,701 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:42,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508583521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:42,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:42,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:42,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711889343] [2021-06-05 04:59:42,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:42,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:42,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:42,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:42,750 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:42,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:42,964 INFO L93 Difference]: Finished difference Result 112 states and 216 transitions. [2021-06-05 04:59:42,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 04:59:42,964 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 [2021-06-05 04:59:42,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:42,964 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:59:42,964 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 04:59:42,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 252.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 04:59:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2021-06-05 04:59:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 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) [2021-06-05 04:59:42,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 04:59:42,966 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 04:59:42,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:42,966 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 04:59:42,966 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) [2021-06-05 04:59:42,966 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 04:59:42,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:42,966 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:42,966 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:43,166 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4150 [2021-06-05 04:59:43,166 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:43,167 INFO L82 PathProgramCache]: Analyzing trace with hash -727682838, now seen corresponding path program 214 times [2021-06-05 04:59:43,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:43,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078396499] [2021-06-05 04:59:43,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:43,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:43,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:43,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078396499] [2021-06-05 04:59:43,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078396499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:43,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415855663] [2021-06-05 04:59:43,257 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 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 [2021-06-05 04:59:43,282 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:43,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:43,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:43,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:43,389 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 [2021-06-05 04:59:43,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:43,392 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 [2021-06-05 04:59:43,393 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,439 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 04:59:43,439 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:43,441 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 [2021-06-05 04:59:43,442 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:43,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:43,458 INFO L518 ElimStorePlain]: Eliminatee v_prenex_127 vanished before elimination [2021-06-05 04:59:43,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:43,459 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:43,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:43,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415855663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:43,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:43,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:43,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193134228] [2021-06-05 04:59:43,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:43,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:43,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:43,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:43,506 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:43,598 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 04:59:43,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:43,598 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:43,598 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:59:43,598 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:43,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 161.0ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:43,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-06-05 04:59:43,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 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) [2021-06-05 04:59:43,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 04:59:43,599 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 04:59:43,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:43,599 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 04:59:43,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:43,599 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 04:59:43,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:43,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:43,600 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:43,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4160,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:43,800 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:43,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1175020561, now seen corresponding path program 215 times [2021-06-05 04:59:43,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:43,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776830083] [2021-06-05 04:59:43,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:43,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:43,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776830083] [2021-06-05 04:59:43,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776830083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197760247] [2021-06-05 04:59:43,896 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 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 [2021-06-05 04:59:43,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:43,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:43,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:44,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:44,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:44,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:59:44,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:44,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:44,003 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 16 treesize of output 12 [2021-06-05 04:59:44,004 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:44,029 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:44,029 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:44,030 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:44,030 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:44,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:44,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197760247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:44,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:44,065 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:44,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692259153] [2021-06-05 04:59:44,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:44,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:44,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:44,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:44,065 INFO L87 Difference]: Start difference. First operand 85 states and 175 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) [2021-06-05 04:59:44,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:44,203 INFO L93 Difference]: Finished difference Result 112 states and 219 transitions. [2021-06-05 04:59:44,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:44,204 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 17 [2021-06-05 04:59:44,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:44,204 INFO L225 Difference]: With dead ends: 112 [2021-06-05 04:59:44,204 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 04:59:44,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:59:44,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 04:59:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 85. [2021-06-05 04:59:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 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) [2021-06-05 04:59:44,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 04:59:44,205 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 04:59:44,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:44,205 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 04:59:44,205 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) [2021-06-05 04:59:44,205 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 04:59:44,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:44,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:44,205 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:44,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4177 [2021-06-05 04:59:44,406 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:44,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:44,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1137149490, now seen corresponding path program 216 times [2021-06-05 04:59:44,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:44,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031695120] [2021-06-05 04:59:44,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:44,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:44,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:44,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031695120] [2021-06-05 04:59:44,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031695120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:44,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359622379] [2021-06-05 04:59:44,498 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 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 [2021-06-05 04:59:44,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:44,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:44,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:44,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:44,625 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 [2021-06-05 04:59:44,626 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:44,628 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:44,628 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 15 treesize of output 11 [2021-06-05 04:59:44,629 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:44,668 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 04:59:44,670 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 [2021-06-05 04:59:44,671 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:44,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:44,684 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:44,684 INFO L518 ElimStorePlain]: Eliminatee v_prenex_130 vanished before elimination [2021-06-05 04:59:44,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:44,685 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:44,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:44,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359622379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:44,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:44,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:44,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921880036] [2021-06-05 04:59:44,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:44,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:44,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:44,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:44,750 INFO L87 Difference]: Start difference. First operand 85 states and 175 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) [2021-06-05 04:59:44,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:44,903 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-06-05 04:59:44,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:44,903 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 17 [2021-06-05 04:59:44,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:44,904 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:59:44,904 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:44,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 217.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:59:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:44,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 04:59:44,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 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) [2021-06-05 04:59:44,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 04:59:44,905 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 04:59:44,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:44,905 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 04:59:44,905 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) [2021-06-05 04:59:44,905 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 04:59:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:44,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:44,905 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:45,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4185 [2021-06-05 04:59:45,106 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1710250363, now seen corresponding path program 217 times [2021-06-05 04:59:45,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:45,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575271836] [2021-06-05 04:59:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:45,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:45,209 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:45,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:45,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575271836] [2021-06-05 04:59:45,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575271836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:45,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529931736] [2021-06-05 04:59:45,210 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 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 [2021-06-05 04:59:45,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:45,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:45,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:45,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:45,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529931736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:45,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:45,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:45,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503114237] [2021-06-05 04:59:45,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:45,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:45,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:45,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:45,312 INFO L87 Difference]: Start difference. First operand 84 states and 172 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) [2021-06-05 04:59:45,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:45,411 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 04:59:45,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:45,411 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 [2021-06-05 04:59:45,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:45,411 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:59:45,411 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:59:45,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 162.4ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:45,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:59:45,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-06-05 04:59:45,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 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) [2021-06-05 04:59:45,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 04:59:45,412 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 04:59:45,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:45,412 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 04:59:45,412 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) [2021-06-05 04:59:45,412 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 04:59:45,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:45,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:45,413 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:45,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4205,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:45,613 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:45,613 INFO L82 PathProgramCache]: Analyzing trace with hash -2082106650, now seen corresponding path program 218 times [2021-06-05 04:59:45,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:45,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699032586] [2021-06-05 04:59:45,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:45,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:45,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699032586] [2021-06-05 04:59:45,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699032586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:45,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062968573] [2021-06-05 04:59:45,726 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 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 [2021-06-05 04:59:45,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:45,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:45,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:45,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:45,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062968573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:45,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:45,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:45,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357306676] [2021-06-05 04:59:45,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:45,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:45,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:45,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:45,846 INFO L87 Difference]: Start difference. First operand 79 states and 160 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) [2021-06-05 04:59:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:45,963 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-06-05 04:59:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:45,963 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 [2021-06-05 04:59:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:45,963 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:59:45,963 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:59:45,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:45,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:59:45,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2021-06-05 04:59:45,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 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) [2021-06-05 04:59:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 04:59:45,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 04:59:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:45,965 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 04:59:45,965 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) [2021-06-05 04:59:45,965 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 04:59:45,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:45,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:45,965 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:46,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4208 [2021-06-05 04:59:46,180 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1360711919, now seen corresponding path program 219 times [2021-06-05 04:59:46,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:46,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757031226] [2021-06-05 04:59:46,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:46,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757031226] [2021-06-05 04:59:46,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757031226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:46,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150476345] [2021-06-05 04:59:46,297 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 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 [2021-06-05 04:59:46,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:46,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:46,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:46,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:46,409 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 17 treesize of output 13 [2021-06-05 04:59:46,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,412 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 [2021-06-05 04:59:46,412 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,415 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 [2021-06-05 04:59:46,416 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,418 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 [2021-06-05 04:59:46,419 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,421 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:46,421 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,423 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 17 treesize of output 13 [2021-06-05 04:59:46,424 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:46,448 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:46,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:46,449 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:46,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:46,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150476345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:46,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:46,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:46,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298209986] [2021-06-05 04:59:46,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:46,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:46,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:46,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:46,487 INFO L87 Difference]: Start difference. First operand 76 states and 153 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) [2021-06-05 04:59:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:46,579 INFO L93 Difference]: Finished difference Result 85 states and 167 transitions. [2021-06-05 04:59:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:46,579 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 [2021-06-05 04:59:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:46,579 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:59:46,579 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:59:46,580 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 186.2ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:46,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:59:46,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-06-05 04:59:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 04:59:46,581 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 04:59:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:46,581 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 04:59:46,581 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) [2021-06-05 04:59:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 04:59:46,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:46,581 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:46,581 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:46,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4215,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:46,781 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:46,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:46,782 INFO L82 PathProgramCache]: Analyzing trace with hash 2102833296, now seen corresponding path program 220 times [2021-06-05 04:59:46,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:46,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307624291] [2021-06-05 04:59:46,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:46,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:46,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307624291] [2021-06-05 04:59:46,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307624291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:46,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450227243] [2021-06-05 04:59:46,902 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 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 [2021-06-05 04:59:46,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:46,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:46,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:46,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:46,982 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 24 treesize of output 18 [2021-06-05 04:59:46,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,985 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 25 treesize of output 19 [2021-06-05 04:59:46,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:46,992 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:46,993 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 04:59:46,993 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 04:59:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:47,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450227243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:47,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:47,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:47,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346853346] [2021-06-05 04:59:47,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:47,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:47,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:47,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:47,016 INFO L87 Difference]: Start difference. First operand 79 states and 159 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) [2021-06-05 04:59:47,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:47,109 INFO L93 Difference]: Finished difference Result 87 states and 175 transitions. [2021-06-05 04:59:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:47,110 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 [2021-06-05 04:59:47,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:47,110 INFO L225 Difference]: With dead ends: 87 [2021-06-05 04:59:47,110 INFO L226 Difference]: Without dead ends: 87 [2021-06-05 04:59:47,110 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 172.4ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-05 04:59:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-06-05 04:59:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.0384615384615383) internal successors, (159), 78 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:47,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 159 transitions. [2021-06-05 04:59:47,111 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 159 transitions. Word has length 17 [2021-06-05 04:59:47,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:47,111 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 159 transitions. [2021-06-05 04:59:47,111 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) [2021-06-05 04:59:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 159 transitions. [2021-06-05 04:59:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:47,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:47,111 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:47,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4224,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:47,325 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:47,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:47,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1120265771, now seen corresponding path program 221 times [2021-06-05 04:59:47,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:47,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409231965] [2021-06-05 04:59:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:47,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:47,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:47,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409231965] [2021-06-05 04:59:47,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409231965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:47,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395805858] [2021-06-05 04:59:47,424 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 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 [2021-06-05 04:59:47,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:47,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:47,537 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,538 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 16 treesize of output 12 [2021-06-05 04:59:47,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:47,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:47,542 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 15 treesize of output 11 [2021-06-05 04:59:47,543 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:47,577 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:47,577 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:47,578 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:47,578 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:47,620 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:47,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395805858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:47,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:47,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:47,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845191441] [2021-06-05 04:59:47,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:47,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:47,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:47,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:47,621 INFO L87 Difference]: Start difference. First operand 79 states and 159 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) [2021-06-05 04:59:47,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:47,796 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 04:59:47,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:47,796 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 [2021-06-05 04:59:47,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:47,797 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:59:47,797 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 04:59:47,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 234.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 04:59:47,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 84. [2021-06-05 04:59:47,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:47,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 04:59:47,798 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 04:59:47,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:47,798 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 04:59:47,798 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) [2021-06-05 04:59:47,798 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 04:59:47,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:47,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:47,798 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:47,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4227,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:47,999 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:47,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:47,999 INFO L82 PathProgramCache]: Analyzing trace with hash 867110506, now seen corresponding path program 222 times [2021-06-05 04:59:47,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:47,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214608962] [2021-06-05 04:59:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:48,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:48,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:48,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214608962] [2021-06-05 04:59:48,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214608962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:48,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021372198] [2021-06-05 04:59:48,105 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 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 [2021-06-05 04:59:48,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 04:59:48,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:48,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:48,192 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 [2021-06-05 04:59:48,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,195 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 [2021-06-05 04:59:48,196 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,198 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,199 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,199 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 16 treesize of output 12 [2021-06-05 04:59:48,199 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,202 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 15 treesize of output 11 [2021-06-05 04:59:48,202 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,236 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:48,236 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:48,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:48,237 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:48,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021372198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:48,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:48,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:48,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185232508] [2021-06-05 04:59:48,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:48,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:48,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:48,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:48,274 INFO L87 Difference]: Start difference. First operand 84 states and 171 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:48,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:48,382 INFO L93 Difference]: Finished difference Result 113 states and 221 transitions. [2021-06-05 04:59:48,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:48,383 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:48,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:48,383 INFO L225 Difference]: With dead ends: 113 [2021-06-05 04:59:48,383 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 04:59:48,383 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 159.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:48,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 04:59:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 84. [2021-06-05 04:59:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0602409638554215) internal successors, (171), 83 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 171 transitions. [2021-06-05 04:59:48,384 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 171 transitions. Word has length 17 [2021-06-05 04:59:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:48,384 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 171 transitions. [2021-06-05 04:59:48,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 171 transitions. [2021-06-05 04:59:48,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:48,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:48,384 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:48,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4245,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:48,585 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:48,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:48,585 INFO L82 PathProgramCache]: Analyzing trace with hash 419772783, now seen corresponding path program 223 times [2021-06-05 04:59:48,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:48,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146429952] [2021-06-05 04:59:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:48,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:48,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:48,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146429952] [2021-06-05 04:59:48,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146429952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:48,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905749578] [2021-06-05 04:59:48,686 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 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 [2021-06-05 04:59:48,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:48,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:48,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:48,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,797 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 16 treesize of output 12 [2021-06-05 04:59:48,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:48,800 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 15 treesize of output 11 [2021-06-05 04:59:48,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:48,829 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 04:59:48,829 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:48,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:48,829 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 04:59:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:48,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905749578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:48,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:48,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:48,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401789911] [2021-06-05 04:59:48,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:48,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:48,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:48,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:48,865 INFO L87 Difference]: Start difference. First operand 84 states and 171 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) [2021-06-05 04:59:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:49,019 INFO L93 Difference]: Finished difference Result 91 states and 183 transitions. [2021-06-05 04:59:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:49,019 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 17 [2021-06-05 04:59:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:49,019 INFO L225 Difference]: With dead ends: 91 [2021-06-05 04:59:49,019 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 04:59:49,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 213.4ms TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 04:59:49,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2021-06-05 04:59:49,020 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) [2021-06-05 04:59:49,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 04:59:49,020 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 04:59:49,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:49,020 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 04:59:49,021 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) [2021-06-05 04:59:49,021 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 04:59:49,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:49,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:49,021 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:49,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4255 [2021-06-05 04:59:49,225 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:49,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1563024462, now seen corresponding path program 224 times [2021-06-05 04:59:49,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:49,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285098834] [2021-06-05 04:59:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:49,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:49,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285098834] [2021-06-05 04:59:49,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285098834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:49,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420687944] [2021-06-05 04:59:49,319 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 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 [2021-06-05 04:59:49,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:49,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:49,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:49,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:49,419 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 [2021-06-05 04:59:49,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:49,422 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 [2021-06-05 04:59:49,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:49,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:49,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:49,425 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 15 treesize of output 11 [2021-06-05 04:59:49,426 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:49,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:49,428 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 [2021-06-05 04:59:49,429 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:49,462 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 04:59:49,462 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:49,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:49,463 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 04:59:49,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:49,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420687944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:49,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:49,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:49,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107416236] [2021-06-05 04:59:49,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:49,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:49,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:49,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:49,521 INFO L87 Difference]: Start difference. First operand 80 states and 162 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) [2021-06-05 04:59:49,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:49,695 INFO L93 Difference]: Finished difference Result 90 states and 179 transitions. [2021-06-05 04:59:49,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:49,696 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 17 [2021-06-05 04:59:49,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:49,696 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:59:49,696 INFO L226 Difference]: Without dead ends: 88 [2021-06-05 04:59:49,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 231.9ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-06-05 04:59:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2021-06-05 04:59:49,697 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) [2021-06-05 04:59:49,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 157 transitions. [2021-06-05 04:59:49,697 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 157 transitions. Word has length 17 [2021-06-05 04:59:49,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:49,697 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 157 transitions. [2021-06-05 04:59:49,697 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) [2021-06-05 04:59:49,697 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 157 transitions. [2021-06-05 04:59:49,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:49,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:49,697 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:49,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4271,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:49,898 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:49,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:49,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1708011093, now seen corresponding path program 225 times [2021-06-05 04:59:49,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:49,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325138296] [2021-06-05 04:59:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:49,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:49,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:49,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325138296] [2021-06-05 04:59:49,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325138296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:49,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236910965] [2021-06-05 04:59:49,997 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 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 [2021-06-05 04:59:50,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:50,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:50,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:50,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:50,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:50,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:50,096 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 16 treesize of output 12 [2021-06-05 04:59:50,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:50,099 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 15 treesize of output 11 [2021-06-05 04:59:50,099 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,123 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:50,123 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:50,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:50,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:50,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236910965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:50,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:50,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:50,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935572388] [2021-06-05 04:59:50,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:50,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:50,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:50,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:50,166 INFO L87 Difference]: Start difference. First operand 78 states and 157 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) [2021-06-05 04:59:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:50,380 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-06-05 04:59:50,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:50,381 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 [2021-06-05 04:59:50,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:50,381 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:59:50,381 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 04:59:50,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:50,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 04:59:50,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 85. [2021-06-05 04:59:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 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) [2021-06-05 04:59:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 04:59:50,382 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 04:59:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:50,382 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 04:59:50,382 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) [2021-06-05 04:59:50,382 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 04:59:50,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:50,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:50,382 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:50,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4284 [2021-06-05 04:59:50,583 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:50,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:50,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1454855828, now seen corresponding path program 226 times [2021-06-05 04:59:50,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:50,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540473703] [2021-06-05 04:59:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:50,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:50,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540473703] [2021-06-05 04:59:50,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540473703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:50,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241093337] [2021-06-05 04:59:50,679 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 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 [2021-06-05 04:59:50,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:50,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:50,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:50,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:50,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:50,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:50,808 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 16 treesize of output 12 [2021-06-05 04:59:50,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,811 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 [2021-06-05 04:59:50,812 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,851 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:59:50,851 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:50,853 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 [2021-06-05 04:59:50,853 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:50,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:50,867 INFO L518 ElimStorePlain]: Eliminatee v_prenex_135 vanished before elimination [2021-06-05 04:59:50,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:50,868 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:50,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241093337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:50,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:50,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:50,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785132263] [2021-06-05 04:59:50,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:50,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:50,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:50,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:50,914 INFO L87 Difference]: Start difference. First operand 85 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:51,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:51,009 INFO L93 Difference]: Finished difference Result 104 states and 204 transitions. [2021-06-05 04:59:51,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:51,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 04:59:51,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:51,009 INFO L225 Difference]: With dead ends: 104 [2021-06-05 04:59:51,009 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:51,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 166.3ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:51,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:51,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 85. [2021-06-05 04:59:51,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 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) [2021-06-05 04:59:51,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 04:59:51,010 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 04:59:51,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:51,010 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 04:59:51,010 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 04:59:51,010 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 04:59:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:51,011 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:51,011 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:51,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4294 [2021-06-05 04:59:51,211 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:51,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:51,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1007518105, now seen corresponding path program 227 times [2021-06-05 04:59:51,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:51,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188045495] [2021-06-05 04:59:51,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:51,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:51,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:51,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188045495] [2021-06-05 04:59:51,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188045495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:51,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484597015] [2021-06-05 04:59:51,310 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 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 [2021-06-05 04:59:51,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:59:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:51,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:51,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:51,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:51,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:51,420 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 16 treesize of output 12 [2021-06-05 04:59:51,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:51,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:51,423 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 15 treesize of output 11 [2021-06-05 04:59:51,424 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:51,446 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 04:59:51,446 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:51,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:51,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 04:59:51,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:51,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484597015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:51,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:51,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:51,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877394752] [2021-06-05 04:59:51,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:51,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:51,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:51,488 INFO L87 Difference]: Start difference. First operand 85 states and 175 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) [2021-06-05 04:59:51,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:51,641 INFO L93 Difference]: Finished difference Result 111 states and 217 transitions. [2021-06-05 04:59:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:51,641 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 17 [2021-06-05 04:59:51,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:51,641 INFO L225 Difference]: With dead ends: 111 [2021-06-05 04:59:51,641 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 04:59:51,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 04:59:51,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 04:59:51,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 85. [2021-06-05 04:59:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0833333333333335) internal successors, (175), 84 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) [2021-06-05 04:59:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 175 transitions. [2021-06-05 04:59:51,642 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 175 transitions. Word has length 17 [2021-06-05 04:59:51,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:51,642 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 175 transitions. [2021-06-05 04:59:51,642 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) [2021-06-05 04:59:51,642 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 175 transitions. [2021-06-05 04:59:51,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:51,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:51,643 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:51,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4311,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:51,843 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:51,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:51,843 INFO L82 PathProgramCache]: Analyzing trace with hash -975279140, now seen corresponding path program 228 times [2021-06-05 04:59:51,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:51,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115429956] [2021-06-05 04:59:51,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:51,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:51,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:51,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:51,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115429956] [2021-06-05 04:59:51,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115429956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:51,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649453499] [2021-06-05 04:59:51,952 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 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 [2021-06-05 04:59:51,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:51,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:51,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:52,085 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 [2021-06-05 04:59:52,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:52,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:52,089 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 16 treesize of output 12 [2021-06-05 04:59:52,089 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:52,128 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 04:59:52,128 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:52,130 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 [2021-06-05 04:59:52,131 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:52,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:52,145 INFO L518 ElimStorePlain]: Eliminatee v_prenex_137 vanished before elimination [2021-06-05 04:59:52,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:52,146 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 04:59:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:52,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649453499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:52,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:52,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:52,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465026142] [2021-06-05 04:59:52,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:52,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:52,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:52,213 INFO L87 Difference]: Start difference. First operand 85 states and 175 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) [2021-06-05 04:59:52,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:52,357 INFO L93 Difference]: Finished difference Result 106 states and 205 transitions. [2021-06-05 04:59:52,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 04:59:52,358 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 17 [2021-06-05 04:59:52,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:52,358 INFO L225 Difference]: With dead ends: 106 [2021-06-05 04:59:52,358 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 04:59:52,358 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 238.7ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-06-05 04:59:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 04:59:52,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2021-06-05 04:59:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.072289156626506) internal successors, (172), 83 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) [2021-06-05 04:59:52,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 172 transitions. [2021-06-05 04:59:52,359 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 172 transitions. Word has length 17 [2021-06-05 04:59:52,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:52,359 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 172 transitions. [2021-06-05 04:59:52,359 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) [2021-06-05 04:59:52,359 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 172 transitions. [2021-06-05 04:59:52,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:52,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:52,360 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:52,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4319,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:52,560 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:52,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:52,560 INFO L82 PathProgramCache]: Analyzing trace with hash 472288303, now seen corresponding path program 229 times [2021-06-05 04:59:52,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:52,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324775471] [2021-06-05 04:59:52,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:52,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:52,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:52,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324775471] [2021-06-05 04:59:52,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324775471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:52,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603167850] [2021-06-05 04:59:52,675 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 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 [2021-06-05 04:59:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:52,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:52,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:52,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603167850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:52,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:52,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181032189] [2021-06-05 04:59:52,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:52,779 INFO L87 Difference]: Start difference. First operand 84 states and 172 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) [2021-06-05 04:59:52,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:52,886 INFO L93 Difference]: Finished difference Result 90 states and 181 transitions. [2021-06-05 04:59:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:52,886 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 [2021-06-05 04:59:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:52,887 INFO L225 Difference]: With dead ends: 90 [2021-06-05 04:59:52,887 INFO L226 Difference]: Without dead ends: 90 [2021-06-05 04:59:52,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-06-05 04:59:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2021-06-05 04:59:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.051282051282051) internal successors, (160), 78 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) [2021-06-05 04:59:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 160 transitions. [2021-06-05 04:59:52,888 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 160 transitions. Word has length 17 [2021-06-05 04:59:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:52,888 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 160 transitions. [2021-06-05 04:59:52,888 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) [2021-06-05 04:59:52,888 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 160 transitions. [2021-06-05 04:59:52,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:52,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:52,888 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:53,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4339 [2021-06-05 04:59:53,097 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:53,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:53,097 INFO L82 PathProgramCache]: Analyzing trace with hash 100432016, now seen corresponding path program 230 times [2021-06-05 04:59:53,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:53,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660601325] [2021-06-05 04:59:53,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:53,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:53,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:53,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660601325] [2021-06-05 04:59:53,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660601325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:53,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995289140] [2021-06-05 04:59:53,206 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 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 [2021-06-05 04:59:53,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:53,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:53,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:53,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:53,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995289140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:53,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:53,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172278784] [2021-06-05 04:59:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:53,346 INFO L87 Difference]: Start difference. First operand 79 states and 160 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) [2021-06-05 04:59:53,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:53,484 INFO L93 Difference]: Finished difference Result 83 states and 164 transitions. [2021-06-05 04:59:53,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:53,484 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 [2021-06-05 04:59:53,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:53,485 INFO L225 Difference]: With dead ends: 83 [2021-06-05 04:59:53,485 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:59:53,485 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 206.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:53,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:59:53,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2021-06-05 04:59:53,486 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) [2021-06-05 04:59:53,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 04:59:53,486 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 04:59:53,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:53,486 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 04:59:53,486 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) [2021-06-05 04:59:53,486 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 04:59:53,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:53,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:53,486 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:53,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4342 [2021-06-05 04:59:53,687 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:53,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:53,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1546720405, now seen corresponding path program 231 times [2021-06-05 04:59:53,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:53,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995268536] [2021-06-05 04:59:53,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:53,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:53,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995268536] [2021-06-05 04:59:53,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995268536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:53,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585500644] [2021-06-05 04:59:53,801 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 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 [2021-06-05 04:59:53,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 04:59:53,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:53,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:53,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:53,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:53,943 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:53,943 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 16 treesize of output 12 [2021-06-05 04:59:53,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:53,946 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 [2021-06-05 04:59:53,947 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:53,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:53,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:53,950 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 15 treesize of output 11 [2021-06-05 04:59:53,951 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:53,953 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 [2021-06-05 04:59:53,954 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:53,995 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 04:59:53,995 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:53,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:53,996 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 04:59:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:54,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585500644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:54,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:54,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:54,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508238753] [2021-06-05 04:59:54,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:54,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:54,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:54,045 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:54,356 INFO L93 Difference]: Finished difference Result 110 states and 212 transitions. [2021-06-05 04:59:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:54,356 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 04:59:54,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:54,356 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:59:54,356 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:59:54,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 396.5ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-06-05 04:59:54,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:59:54,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-06-05 04:59:54,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:54,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 04:59:54,357 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 04:59:54,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:54,357 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 04:59:54,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 04:59:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 04:59:54,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:54,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:54,358 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:54,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4348,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:54,558 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:54,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:54,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1799875670, now seen corresponding path program 232 times [2021-06-05 04:59:54,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:54,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604236926] [2021-06-05 04:59:54,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:54,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:54,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604236926] [2021-06-05 04:59:54,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604236926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:54,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455005121] [2021-06-05 04:59:54,656 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 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 [2021-06-05 04:59:54,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:54,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:54,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:54,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:54,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:54,844 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:54,844 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 16 treesize of output 12 [2021-06-05 04:59:54,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:54,847 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 8 treesize of output 6 [2021-06-05 04:59:54,848 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:54,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:54,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:54,852 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 15 treesize of output 11 [2021-06-05 04:59:54,852 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:54,855 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 [2021-06-05 04:59:54,855 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:54,913 INFO L628 ElimStorePlain]: treesize reduction 39, result has 61.0 percent of original size [2021-06-05 04:59:54,913 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:54,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:59:54,914 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:129, output treesize:29 [2021-06-05 04:59:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:54,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455005121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:54,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:54,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:54,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035022801] [2021-06-05 04:59:54,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:54,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:54,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:54,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:54,964 INFO L87 Difference]: Start difference. First operand 86 states and 179 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) [2021-06-05 04:59:55,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:55,112 INFO L93 Difference]: Finished difference Result 107 states and 211 transitions. [2021-06-05 04:59:55,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:55,112 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 [2021-06-05 04:59:55,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:55,112 INFO L225 Difference]: With dead ends: 107 [2021-06-05 04:59:55,112 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:59:55,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:59:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 86. [2021-06-05 04:59:55,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:55,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 04:59:55,114 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 04:59:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:55,114 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 04:59:55,114 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) [2021-06-05 04:59:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 04:59:55,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:55,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:55,114 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:55,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4360,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:55,314 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:55,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2047753903, now seen corresponding path program 233 times [2021-06-05 04:59:55,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:55,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413455216] [2021-06-05 04:59:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:55,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:55,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413455216] [2021-06-05 04:59:55,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413455216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:55,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60755135] [2021-06-05 04:59:55,403 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 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 [2021-06-05 04:59:55,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 04:59:55,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:55,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:55,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:55,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:55,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:55,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 04:59:55,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,557 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 [2021-06-05 04:59:55,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,560 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 [2021-06-05 04:59:55,561 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:55,564 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 15 treesize of output 11 [2021-06-05 04:59:55,565 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:55,605 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 04:59:55,606 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:55,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 04:59:55,607 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 04:59:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:55,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60755135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:55,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:55,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:55,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80241116] [2021-06-05 04:59:55,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:55,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:55,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:55,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:55,644 INFO L87 Difference]: Start difference. First operand 86 states and 179 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) [2021-06-05 04:59:55,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:55,923 INFO L93 Difference]: Finished difference Result 110 states and 215 transitions. [2021-06-05 04:59:55,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:55,924 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 [2021-06-05 04:59:55,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:55,924 INFO L225 Difference]: With dead ends: 110 [2021-06-05 04:59:55,924 INFO L226 Difference]: Without dead ends: 110 [2021-06-05 04:59:55,924 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 04:59:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-06-05 04:59:55,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 86. [2021-06-05 04:59:55,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.1058823529411765) internal successors, (179), 85 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:55,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 179 transitions. [2021-06-05 04:59:55,926 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 179 transitions. Word has length 17 [2021-06-05 04:59:55,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:55,926 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 179 transitions. [2021-06-05 04:59:55,926 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) [2021-06-05 04:59:55,926 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 179 transitions. [2021-06-05 04:59:55,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:55,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:55,926 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:56,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4379,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:56,135 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:56,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:56,136 INFO L82 PathProgramCache]: Analyzing trace with hash 64956658, now seen corresponding path program 234 times [2021-06-05 04:59:56,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:56,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327055485] [2021-06-05 04:59:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:56,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:56,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327055485] [2021-06-05 04:59:56,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327055485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:56,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545546715] [2021-06-05 04:59:56,234 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 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 [2021-06-05 04:59:56,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 04:59:56,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:56,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:56,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:56,443 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 [2021-06-05 04:59:56,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:56,447 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 [2021-06-05 04:59:56,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:56,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:56,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:56,451 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 16 treesize of output 12 [2021-06-05 04:59:56,452 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:56,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 04:59:56,455 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 15 treesize of output 11 [2021-06-05 04:59:56,455 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:56,509 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 04:59:56,509 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:56,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 04:59:56,511 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 04:59:56,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:56,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545546715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:56,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:56,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 04:59:56,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052475958] [2021-06-05 04:59:56,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 04:59:56,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:56,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 04:59:56,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:56,588 INFO L87 Difference]: Start difference. First operand 86 states and 179 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) [2021-06-05 04:59:56,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:56,789 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 04:59:56,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 04:59:56,789 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 [2021-06-05 04:59:56,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:56,790 INFO L225 Difference]: With dead ends: 109 [2021-06-05 04:59:56,790 INFO L226 Difference]: Without dead ends: 107 [2021-06-05 04:59:56,790 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 284.8ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 04:59:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-06-05 04:59:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2021-06-05 04:59:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 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) [2021-06-05 04:59:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-06-05 04:59:56,791 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-06-05 04:59:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:56,791 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-06-05 04:59:56,791 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) [2021-06-05 04:59:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-06-05 04:59:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:56,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:56,791 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:57,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4389,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:57,006 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:57,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:57,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1512524101, now seen corresponding path program 235 times [2021-06-05 04:59:57,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:57,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447032256] [2021-06-05 04:59:57,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:57,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:57,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:57,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447032256] [2021-06-05 04:59:57,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447032256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:57,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729736515] [2021-06-05 04:59:57,110 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 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 [2021-06-05 04:59:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:57,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729736515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:57,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:57,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:57,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165488021] [2021-06-05 04:59:57,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:57,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:57,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:57,247 INFO L87 Difference]: Start difference. First operand 85 states and 176 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) [2021-06-05 04:59:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:57,372 INFO L93 Difference]: Finished difference Result 102 states and 206 transitions. [2021-06-05 04:59:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:57,373 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 [2021-06-05 04:59:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:57,373 INFO L225 Difference]: With dead ends: 102 [2021-06-05 04:59:57,373 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 04:59:57,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 194.0ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:57,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 04:59:57,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-06-05 04:59:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0952380952380953) internal successors, (176), 84 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) [2021-06-05 04:59:57,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 176 transitions. [2021-06-05 04:59:57,374 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 176 transitions. Word has length 17 [2021-06-05 04:59:57,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:57,374 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 176 transitions. [2021-06-05 04:59:57,374 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) [2021-06-05 04:59:57,374 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 176 transitions. [2021-06-05 04:59:57,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:57,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:57,375 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:57,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4411,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:57,589 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:57,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:57,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1140667814, now seen corresponding path program 236 times [2021-06-05 04:59:57,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:57,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326743429] [2021-06-05 04:59:57,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:57,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:57,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:57,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326743429] [2021-06-05 04:59:57,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326743429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:57,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684724825] [2021-06-05 04:59:57,689 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 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 [2021-06-05 04:59:57,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 04:59:57,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:57,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:57,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:57,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684724825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:57,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:57,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 04:59:57,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839102195] [2021-06-05 04:59:57,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 04:59:57,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:57,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 04:59:57,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:57,854 INFO L87 Difference]: Start difference. First operand 85 states and 176 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) [2021-06-05 04:59:58,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:58,026 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-06-05 04:59:58,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:58,026 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 [2021-06-05 04:59:58,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:58,027 INFO L225 Difference]: With dead ends: 93 [2021-06-05 04:59:58,027 INFO L226 Difference]: Without dead ends: 89 [2021-06-05 04:59:58,027 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 226.3ms TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-06-05 04:59:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-06-05 04:59:58,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2021-06-05 04:59:58,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:58,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 173 transitions. [2021-06-05 04:59:58,028 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 173 transitions. Word has length 17 [2021-06-05 04:59:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:58,028 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 173 transitions. [2021-06-05 04:59:58,028 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) [2021-06-05 04:59:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 173 transitions. [2021-06-05 04:59:58,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:58,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:58,028 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:58,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4414 [2021-06-05 04:59:58,229 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:58,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2100269423, now seen corresponding path program 237 times [2021-06-05 04:59:58,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:58,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473322806] [2021-06-05 04:59:58,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:58,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:58,323 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:58,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:58,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473322806] [2021-06-05 04:59:58,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473322806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:58,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155824263] [2021-06-05 04:59:58,323 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 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 [2021-06-05 04:59:58,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 04:59:58,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:58,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:58,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:58,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:58,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155824263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:58,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:58,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:58,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660647610] [2021-06-05 04:59:58,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:58,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:58,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:58,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:58,462 INFO L87 Difference]: Start difference. First operand 84 states and 173 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) [2021-06-05 04:59:58,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:58,582 INFO L93 Difference]: Finished difference Result 95 states and 191 transitions. [2021-06-05 04:59:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 04:59:58,582 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 [2021-06-05 04:59:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:58,582 INFO L225 Difference]: With dead ends: 95 [2021-06-05 04:59:58,582 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 04:59:58,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 04:59:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 04:59:58,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2021-06-05 04:59:58,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2021-06-05 04:59:58,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 04:59:58,583 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 04:59:58,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:58,583 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 04:59:58,583 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) [2021-06-05 04:59:58,584 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 04:59:58,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:58,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:58,584 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:58,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4420 [2021-06-05 04:59:58,784 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:58,784 INFO L82 PathProgramCache]: Analyzing trace with hash 127975282, now seen corresponding path program 238 times [2021-06-05 04:59:58,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:58,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664606383] [2021-06-05 04:59:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:58,878 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:58,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:58,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664606383] [2021-06-05 04:59:58,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664606383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:58,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723978442] [2021-06-05 04:59:58,879 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 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 [2021-06-05 04:59:58,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 04:59:58,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:58,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:58,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:59,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723978442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:59,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:59,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:59,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289825525] [2021-06-05 04:59:59,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:59,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:59,018 INFO L87 Difference]: Start difference. First operand 78 states and 158 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) [2021-06-05 04:59:59,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:59,152 INFO L93 Difference]: Finished difference Result 84 states and 165 transitions. [2021-06-05 04:59:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 04:59:59,152 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 [2021-06-05 04:59:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:59,153 INFO L225 Difference]: With dead ends: 84 [2021-06-05 04:59:59,153 INFO L226 Difference]: Without dead ends: 78 [2021-06-05 04:59:59,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 204.7ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-06-05 04:59:59,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2021-06-05 04:59:59,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 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) [2021-06-05 04:59:59,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 04:59:59,154 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 04:59:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:59,154 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 04:59:59,154 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) [2021-06-05 04:59:59,154 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 04:59:59,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:59,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:59,154 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:59,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4423,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 04:59:59,370 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:59,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:59,370 INFO L82 PathProgramCache]: Analyzing trace with hash -336533025, now seen corresponding path program 239 times [2021-06-05 04:59:59,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:59,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649244991] [2021-06-05 04:59:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:59,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 04:59:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:59,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 04:59:59,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649244991] [2021-06-05 04:59:59,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649244991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:59,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481251508] [2021-06-05 04:59:59,487 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 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 [2021-06-05 04:59:59,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 04:59:59,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 04:59:59,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 04:59:59,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 04:59:59,600 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 [2021-06-05 04:59:59,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:59,603 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 04:59:59,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:59,607 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 [2021-06-05 04:59:59,607 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:59,610 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 [2021-06-05 04:59:59,611 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:59,613 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 17 treesize of output 13 [2021-06-05 04:59:59,614 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:59,615 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 17 treesize of output 13 [2021-06-05 04:59:59,616 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 04:59:59,640 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 04:59:59,641 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 04:59:59,642 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 04:59:59,642 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 3 variables, input treesize:165, output treesize:42 [2021-06-05 04:59:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 04:59:59,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481251508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 04:59:59,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 04:59:59,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 04:59:59,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518018157] [2021-06-05 04:59:59,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 04:59:59,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 04:59:59,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 04:59:59,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-06-05 04:59:59,679 INFO L87 Difference]: Start difference. First operand 75 states and 151 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) [2021-06-05 04:59:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 04:59:59,767 INFO L93 Difference]: Finished difference Result 85 states and 166 transitions. [2021-06-05 04:59:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 04:59:59,768 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 [2021-06-05 04:59:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 04:59:59,768 INFO L225 Difference]: With dead ends: 85 [2021-06-05 04:59:59,768 INFO L226 Difference]: Without dead ends: 79 [2021-06-05 04:59:59,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 04:59:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-05 04:59:59,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 75. [2021-06-05 04:59:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 04:59:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 04:59:59,769 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 04:59:59,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 04:59:59,769 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 04:59:59,769 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) [2021-06-05 04:59:59,769 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 04:59:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 04:59:59,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 04:59:59,769 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 04:59:59,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4429 [2021-06-05 04:59:59,970 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 04:59:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 04:59:59,970 INFO L82 PathProgramCache]: Analyzing trace with hash 405588352, now seen corresponding path program 240 times [2021-06-05 04:59:59,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 04:59:59,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119397612] [2021-06-05 04:59:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 04:59:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:00,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119397612] [2021-06-05 05:00:00,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119397612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:00,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786517024] [2021-06-05 05:00:00,088 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 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 [2021-06-05 05:00:00,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:00:00,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:00,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:00,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:00,171 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 25 treesize of output 19 [2021-06-05 05:00:00,172 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:00,174 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 [2021-06-05 05:00:00,175 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:00,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:00,182 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:00,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:00:00,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:95, output treesize:22 [2021-06-05 05:00:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786517024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:00,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:00,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:00:00,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798268566] [2021-06-05 05:00:00,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:00:00,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:00,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:00:00,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:00:00,205 INFO L87 Difference]: Start difference. First operand 75 states and 150 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) [2021-06-05 05:00:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:00,295 INFO L93 Difference]: Finished difference Result 83 states and 166 transitions. [2021-06-05 05:00:00,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:00,295 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 [2021-06-05 05:00:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:00,296 INFO L225 Difference]: With dead ends: 83 [2021-06-05 05:00:00,296 INFO L226 Difference]: Without dead ends: 83 [2021-06-05 05:00:00,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-06-05 05:00:00,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 75. [2021-06-05 05:00:00,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.027027027027027) internal successors, (150), 74 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:00,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 150 transitions. [2021-06-05 05:00:00,297 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 150 transitions. Word has length 17 [2021-06-05 05:00:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:00,297 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 150 transitions. [2021-06-05 05:00:00,297 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) [2021-06-05 05:00:00,297 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 150 transitions. [2021-06-05 05:00:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:00,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:00,297 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:00,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4438,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:00,498 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:00,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:00,498 INFO L82 PathProgramCache]: Analyzing trace with hash -576979173, now seen corresponding path program 241 times [2021-06-05 05:00:00,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:00,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717255283] [2021-06-05 05:00:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:00,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:00,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:00,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717255283] [2021-06-05 05:00:00,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717255283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:00,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342890605] [2021-06-05 05:00:00,596 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 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 [2021-06-05 05:00:00,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:00,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:00,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:00,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:00,714 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 16 treesize of output 12 [2021-06-05 05:00:00,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:00,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:00,726 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 15 treesize of output 11 [2021-06-05 05:00:00,727 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:00,755 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:00:00,755 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:00,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:00,756 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:00:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:00,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342890605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:00,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:00,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:00,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468021079] [2021-06-05 05:00:00,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:00,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:00,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:00,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:00,798 INFO L87 Difference]: Start difference. First operand 75 states and 150 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) [2021-06-05 05:00:00,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:00,984 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 05:00:00,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:00:00,984 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 [2021-06-05 05:00:00,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:00,985 INFO L225 Difference]: With dead ends: 106 [2021-06-05 05:00:00,985 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 05:00:00,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 242.5ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 05:00:00,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-06-05 05:00:00,986 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) [2021-06-05 05:00:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 05:00:00,986 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 05:00:00,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:00,986 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 05:00:00,986 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) [2021-06-05 05:00:00,986 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 05:00:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:00,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:00,986 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:01,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4441 [2021-06-05 05:00:01,187 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:01,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:01,187 INFO L82 PathProgramCache]: Analyzing trace with hash -830134438, now seen corresponding path program 242 times [2021-06-05 05:00:01,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:01,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616237657] [2021-06-05 05:00:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:01,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:01,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:01,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616237657] [2021-06-05 05:00:01,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616237657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:01,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170553605] [2021-06-05 05:00:01,286 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 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 [2021-06-05 05:00:01,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:01,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:01,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:01,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:01,372 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 [2021-06-05 05:00:01,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:01,375 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 [2021-06-05 05:00:01,376 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:01,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:01,379 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:01,379 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 16 treesize of output 12 [2021-06-05 05:00:01,380 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:01,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:01,382 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 15 treesize of output 11 [2021-06-05 05:00:01,383 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:01,421 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:00:01,421 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:01,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:01,422 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:00:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:01,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170553605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:01,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:01,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:01,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655130118] [2021-06-05 05:00:01,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:01,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:01,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:01,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:01,459 INFO L87 Difference]: Start difference. First operand 80 states and 162 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 05:00:01,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:01,552 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 05:00:01,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:01,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 05:00:01,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:01,553 INFO L225 Difference]: With dead ends: 109 [2021-06-05 05:00:01,553 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 05:00:01,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 151.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:01,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 05:00:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2021-06-05 05:00:01,554 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) [2021-06-05 05:00:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 162 transitions. [2021-06-05 05:00:01,554 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 162 transitions. Word has length 17 [2021-06-05 05:00:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:01,554 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 162 transitions. [2021-06-05 05:00:01,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 05:00:01,554 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 162 transitions. [2021-06-05 05:00:01,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:01,554 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:01,554 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:01,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4459,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:01,770 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1277472161, now seen corresponding path program 243 times [2021-06-05 05:00:01,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:01,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218102738] [2021-06-05 05:00:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:01,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218102738] [2021-06-05 05:00:01,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218102738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:01,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109107810] [2021-06-05 05:00:01,868 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 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 [2021-06-05 05:00:01,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:00:01,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:01,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:01,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:01,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:01,983 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 [2021-06-05 05:00:01,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:01,986 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:01,986 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 16 treesize of output 12 [2021-06-05 05:00:01,987 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:02,015 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:00:02,015 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:02,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:02,016 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:00:02,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:02,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109107810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:02,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:02,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:02,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065282385] [2021-06-05 05:00:02,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:02,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:02,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:02,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:02,050 INFO L87 Difference]: Start difference. First operand 80 states and 162 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) [2021-06-05 05:00:02,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:02,231 INFO L93 Difference]: Finished difference Result 93 states and 186 transitions. [2021-06-05 05:00:02,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:02,231 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 17 [2021-06-05 05:00:02,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:02,231 INFO L225 Difference]: With dead ends: 93 [2021-06-05 05:00:02,231 INFO L226 Difference]: Without dead ends: 93 [2021-06-05 05:00:02,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:02,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-06-05 05:00:02,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2021-06-05 05:00:02,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.04) internal successors, (153), 75 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) [2021-06-05 05:00:02,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 153 transitions. [2021-06-05 05:00:02,233 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 153 transitions. Word has length 17 [2021-06-05 05:00:02,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:02,233 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 153 transitions. [2021-06-05 05:00:02,233 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) [2021-06-05 05:00:02,233 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 153 transitions. [2021-06-05 05:00:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:02,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:02,233 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:02,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4468,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:02,433 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:02,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:02,434 INFO L82 PathProgramCache]: Analyzing trace with hash 1034697890, now seen corresponding path program 244 times [2021-06-05 05:00:02,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:02,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403293892] [2021-06-05 05:00:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:02,535 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:02,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403293892] [2021-06-05 05:00:02,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403293892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:02,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91227971] [2021-06-05 05:00:02,535 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 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 [2021-06-05 05:00:02,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:02,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:02,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:02,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:02,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:02,631 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 16 treesize of output 12 [2021-06-05 05:00:02,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:02,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:02,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:02,635 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 15 treesize of output 11 [2021-06-05 05:00:02,636 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:02,638 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 [2021-06-05 05:00:02,639 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:02,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:00:02,641 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:02,676 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:00:02,676 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:02,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:02,677 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:00:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:02,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91227971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:02,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:02,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:02,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430602035] [2021-06-05 05:00:02,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:02,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:02,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:02,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:02,759 INFO L87 Difference]: Start difference. First operand 76 states and 153 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) [2021-06-05 05:00:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:02,966 INFO L93 Difference]: Finished difference Result 86 states and 170 transitions. [2021-06-05 05:00:02,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:00:02,966 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 17 [2021-06-05 05:00:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:02,966 INFO L225 Difference]: With dead ends: 86 [2021-06-05 05:00:02,966 INFO L226 Difference]: Without dead ends: 84 [2021-06-05 05:00:02,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 253.7ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:02,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-06-05 05:00:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2021-06-05 05:00:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.0273972602739727) internal successors, (148), 73 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) [2021-06-05 05:00:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 148 transitions. [2021-06-05 05:00:02,967 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 148 transitions. Word has length 17 [2021-06-05 05:00:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:02,967 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 148 transitions. [2021-06-05 05:00:02,967 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) [2021-06-05 05:00:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 148 transitions. [2021-06-05 05:00:02,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:02,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:02,967 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:03,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 248 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4484 [2021-06-05 05:00:03,168 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:03,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:03,168 INFO L82 PathProgramCache]: Analyzing trace with hash 10766149, now seen corresponding path program 245 times [2021-06-05 05:00:03,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:03,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108706244] [2021-06-05 05:00:03,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:03,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:03,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:03,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:03,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108706244] [2021-06-05 05:00:03,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108706244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:03,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694833133] [2021-06-05 05:00:03,268 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 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 [2021-06-05 05:00:03,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:03,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:03,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:03,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:03,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,366 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 16 treesize of output 12 [2021-06-05 05:00:03,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:03,377 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 15 treesize of output 11 [2021-06-05 05:00:03,378 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:03,407 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:00:03,407 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:03,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:03,408 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:00:03,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:03,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694833133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:03,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:03,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:03,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110778049] [2021-06-05 05:00:03,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:03,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:03,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:03,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:03,451 INFO L87 Difference]: Start difference. First operand 74 states and 148 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) [2021-06-05 05:00:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:03,678 INFO L93 Difference]: Finished difference Result 111 states and 214 transitions. [2021-06-05 05:00:03,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:00:03,679 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 [2021-06-05 05:00:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:03,679 INFO L225 Difference]: With dead ends: 111 [2021-06-05 05:00:03,679 INFO L226 Difference]: Without dead ends: 108 [2021-06-05 05:00:03,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:03,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-06-05 05:00:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2021-06-05 05:00:03,680 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) [2021-06-05 05:00:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 05:00:03,680 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 05:00:03,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:03,680 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 05:00:03,680 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) [2021-06-05 05:00:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 05:00:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:03,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:03,680 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:03,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4496 [2021-06-05 05:00:03,883 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:03,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:03,883 INFO L82 PathProgramCache]: Analyzing trace with hash -242389116, now seen corresponding path program 246 times [2021-06-05 05:00:03,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:03,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921792436] [2021-06-05 05:00:03,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:03,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:04,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:04,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921792436] [2021-06-05 05:00:04,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921792436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:04,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80741796] [2021-06-05 05:00:04,005 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 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 [2021-06-05 05:00:04,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:00:04,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:04,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:04,139 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 [2021-06-05 05:00:04,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:04,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:04,143 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 15 treesize of output 11 [2021-06-05 05:00:04,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:04,219 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:00:04,220 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:04,222 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 [2021-06-05 05:00:04,222 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:04,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:04,236 INFO L518 ElimStorePlain]: Eliminatee v_prenex_154 vanished before elimination [2021-06-05 05:00:04,237 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:04,237 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:00:04,282 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:04,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80741796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:04,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:04,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:04,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151345420] [2021-06-05 05:00:04,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:04,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:04,283 INFO L87 Difference]: Start difference. First operand 81 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 05:00:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:04,396 INFO L93 Difference]: Finished difference Result 100 states and 195 transitions. [2021-06-05 05:00:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:04,396 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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 [2021-06-05 05:00:04,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:04,397 INFO L225 Difference]: With dead ends: 100 [2021-06-05 05:00:04,397 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 05:00:04,397 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 05:00:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2021-06-05 05:00:04,398 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) [2021-06-05 05:00:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 05:00:04,398 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 05:00:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:04,398 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 05:00:04,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 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) [2021-06-05 05:00:04,398 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 05:00:04,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:04,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:04,398 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:04,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4506 [2021-06-05 05:00:04,599 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:04,599 INFO L82 PathProgramCache]: Analyzing trace with hash -689726839, now seen corresponding path program 247 times [2021-06-05 05:00:04,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:04,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859569638] [2021-06-05 05:00:04,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:04,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:04,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:04,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859569638] [2021-06-05 05:00:04,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859569638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:04,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276591828] [2021-06-05 05:00:04,711 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 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 [2021-06-05 05:00:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:04,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:04,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:04,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:04,836 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:04,837 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 [2021-06-05 05:00:04,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:04,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:04,840 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 [2021-06-05 05:00:04,840 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:04,874 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:00:04,874 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:04,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:04,875 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:00:04,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:04,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276591828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:04,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:04,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:04,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659396608] [2021-06-05 05:00:04,916 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:04,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:04,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:04,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:04,916 INFO L87 Difference]: Start difference. First operand 81 states and 166 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) [2021-06-05 05:00:05,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:05,132 INFO L93 Difference]: Finished difference Result 113 states and 220 transitions. [2021-06-05 05:00:05,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:05,132 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 17 [2021-06-05 05:00:05,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:05,133 INFO L225 Difference]: With dead ends: 113 [2021-06-05 05:00:05,133 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 05:00:05,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 05:00:05,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2021-06-05 05:00:05,134 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) [2021-06-05 05:00:05,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 166 transitions. [2021-06-05 05:00:05,134 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 166 transitions. Word has length 17 [2021-06-05 05:00:05,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:05,134 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 166 transitions. [2021-06-05 05:00:05,134 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) [2021-06-05 05:00:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 166 transitions. [2021-06-05 05:00:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:05,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:05,134 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:05,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4523,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:05,349 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:05,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:05,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1622443212, now seen corresponding path program 248 times [2021-06-05 05:00:05,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:05,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614443284] [2021-06-05 05:00:05,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:05,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:05,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614443284] [2021-06-05 05:00:05,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614443284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:05,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432172973] [2021-06-05 05:00:05,451 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 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 [2021-06-05 05:00:05,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:05,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:05,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:05,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:05,592 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:05,593 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:05,593 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 15 treesize of output 11 [2021-06-05 05:00:05,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:05,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:00:05,596 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:05,642 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:00:05,642 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:05,644 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 [2021-06-05 05:00:05,645 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:05,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:05,664 INFO L518 ElimStorePlain]: Eliminatee v_prenex_157 vanished before elimination [2021-06-05 05:00:05,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:05,665 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:00:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:05,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432172973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:05,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:05,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:05,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072573994] [2021-06-05 05:00:05,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:05,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:05,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:05,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:05,738 INFO L87 Difference]: Start difference. First operand 81 states and 166 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) [2021-06-05 05:00:05,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:05,961 INFO L93 Difference]: Finished difference Result 102 states and 196 transitions. [2021-06-05 05:00:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:00:05,961 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 17 [2021-06-05 05:00:05,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:05,961 INFO L225 Difference]: With dead ends: 102 [2021-06-05 05:00:05,961 INFO L226 Difference]: Without dead ends: 100 [2021-06-05 05:00:05,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 290.6ms TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-06-05 05:00:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 80. [2021-06-05 05:00:05,962 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) [2021-06-05 05:00:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 163 transitions. [2021-06-05 05:00:05,962 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 163 transitions. Word has length 17 [2021-06-05 05:00:05,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:05,962 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 163 transitions. [2021-06-05 05:00:05,962 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) [2021-06-05 05:00:05,962 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 163 transitions. [2021-06-05 05:00:05,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:05,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:05,963 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:06,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4531,252 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:06,185 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:06,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:06,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1224956641, now seen corresponding path program 249 times [2021-06-05 05:00:06,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:06,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736482001] [2021-06-05 05:00:06,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:06,310 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:06,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:06,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736482001] [2021-06-05 05:00:06,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736482001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658837594] [2021-06-05 05:00:06,311 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 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 [2021-06-05 05:00:06,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:00:06,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:06,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:06,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:06,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658837594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:06,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:06,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:00:06,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915814503] [2021-06-05 05:00:06,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:00:06,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:06,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:00:06,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:00:06,418 INFO L87 Difference]: Start difference. First operand 80 states and 163 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) [2021-06-05 05:00:06,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:06,534 INFO L93 Difference]: Finished difference Result 86 states and 172 transitions. [2021-06-05 05:00:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:06,534 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 [2021-06-05 05:00:06,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:06,534 INFO L225 Difference]: With dead ends: 86 [2021-06-05 05:00:06,534 INFO L226 Difference]: Without dead ends: 86 [2021-06-05 05:00:06,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:06,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-06-05 05:00:06,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2021-06-05 05:00:06,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.0405405405405403) internal successors, (151), 74 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) [2021-06-05 05:00:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 151 transitions. [2021-06-05 05:00:06,535 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 151 transitions. Word has length 17 [2021-06-05 05:00:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:06,536 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 151 transitions. [2021-06-05 05:00:06,536 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) [2021-06-05 05:00:06,536 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 151 transitions. [2021-06-05 05:00:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:06,536 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:06,536 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:06,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4551 [2021-06-05 05:00:06,736 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:06,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:06,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1596812928, now seen corresponding path program 250 times [2021-06-05 05:00:06,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:06,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338209391] [2021-06-05 05:00:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:06,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:06,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:06,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338209391] [2021-06-05 05:00:06,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338209391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:06,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749328372] [2021-06-05 05:00:06,893 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 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 [2021-06-05 05:00:06,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:06,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:07,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:07,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749328372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:07,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:07,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:00:07,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888595727] [2021-06-05 05:00:07,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:00:07,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:07,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:00:07,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:00:07,058 INFO L87 Difference]: Start difference. First operand 75 states and 151 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) [2021-06-05 05:00:07,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:07,203 INFO L93 Difference]: Finished difference Result 79 states and 155 transitions. [2021-06-05 05:00:07,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:07,203 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 [2021-06-05 05:00:07,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:07,203 INFO L225 Difference]: With dead ends: 79 [2021-06-05 05:00:07,203 INFO L226 Difference]: Without dead ends: 75 [2021-06-05 05:00:07,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 253.2ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:00:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-06-05 05:00:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2021-06-05 05:00:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0277777777777777) internal successors, (146), 72 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:07,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 146 transitions. [2021-06-05 05:00:07,204 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 146 transitions. Word has length 17 [2021-06-05 05:00:07,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:07,204 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 146 transitions. [2021-06-05 05:00:07,204 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) [2021-06-05 05:00:07,204 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 146 transitions. [2021-06-05 05:00:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:07,204 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:07,205 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:07,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4554,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:07,405 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:07,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:07,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1051001947, now seen corresponding path program 251 times [2021-06-05 05:00:07,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:07,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434478881] [2021-06-05 05:00:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:07,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:07,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434478881] [2021-06-05 05:00:07,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434478881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:07,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861326016] [2021-06-05 05:00:07,517 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 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 [2021-06-05 05:00:07,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:00:07,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:07,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:07,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:07,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:07,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:07,670 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 16 treesize of output 12 [2021-06-05 05:00:07,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:07,673 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 [2021-06-05 05:00:07,674 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:07,676 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 [2021-06-05 05:00:07,677 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:07,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:07,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:00:07,680 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:07,723 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 05:00:07,723 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:07,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:07,724 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 05:00:07,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:07,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861326016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:07,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:07,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:00:07,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306852241] [2021-06-05 05:00:07,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:00:07,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:07,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:00:07,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:07,769 INFO L87 Difference]: Start difference. First operand 73 states and 146 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 05:00:08,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:08,127 INFO L93 Difference]: Finished difference Result 112 states and 215 transitions. [2021-06-05 05:00:08,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:00:08,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 05:00:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:08,127 INFO L225 Difference]: With dead ends: 112 [2021-06-05 05:00:08,127 INFO L226 Difference]: Without dead ends: 109 [2021-06-05 05:00:08,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 402.9ms TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:00:08,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-06-05 05:00:08,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 82. [2021-06-05 05:00:08,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:08,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 05:00:08,128 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 05:00:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:08,128 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 05:00:08,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 05:00:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 05:00:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:08,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:08,129 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:08,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4560 [2021-06-05 05:00:08,329 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:08,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:08,329 INFO L82 PathProgramCache]: Analyzing trace with hash 797846682, now seen corresponding path program 252 times [2021-06-05 05:00:08,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:08,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238438770] [2021-06-05 05:00:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:08,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:08,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:08,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238438770] [2021-06-05 05:00:08,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238438770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:08,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982368727] [2021-06-05 05:00:08,445 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 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 [2021-06-05 05:00:08,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:00:08,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:08,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:08,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:08,681 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 [2021-06-05 05:00:08,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:08,685 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 [2021-06-05 05:00:08,685 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:08,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:08,689 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 15 treesize of output 11 [2021-06-05 05:00:08,689 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:08,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:08,692 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 16 treesize of output 12 [2021-06-05 05:00:08,693 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:08,748 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 05:00:08,748 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:08,750 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:00:08,750 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 05:00:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:08,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982368727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:08,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:08,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:00:08,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497731746] [2021-06-05 05:00:08,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:00:08,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:08,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:00:08,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:08,803 INFO L87 Difference]: Start difference. First operand 82 states and 170 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) [2021-06-05 05:00:08,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:08,919 INFO L93 Difference]: Finished difference Result 103 states and 202 transitions. [2021-06-05 05:00:08,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:08,919 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 [2021-06-05 05:00:08,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:08,919 INFO L225 Difference]: With dead ends: 103 [2021-06-05 05:00:08,919 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 05:00:08,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:00:08,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 05:00:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2021-06-05 05:00:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 05:00:08,920 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 05:00:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:08,920 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 05:00:08,920 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) [2021-06-05 05:00:08,920 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 05:00:08,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:08,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:08,921 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:09,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4572,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:09,121 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:09,121 INFO L82 PathProgramCache]: Analyzing trace with hash 350508959, now seen corresponding path program 253 times [2021-06-05 05:00:09,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:09,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265960185] [2021-06-05 05:00:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:09,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:09,212 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:09,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:09,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265960185] [2021-06-05 05:00:09,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265960185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:09,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015285797] [2021-06-05 05:00:09,213 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 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 [2021-06-05 05:00:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:09,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:09,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:09,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:09,367 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 16 treesize of output 12 [2021-06-05 05:00:09,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:09,370 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 [2021-06-05 05:00:09,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:09,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:09,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:09,374 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 15 treesize of output 11 [2021-06-05 05:00:09,374 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:09,377 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 [2021-06-05 05:00:09,377 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:09,418 INFO L628 ElimStorePlain]: treesize reduction 58, result has 42.0 percent of original size [2021-06-05 05:00:09,418 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:09,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:09,419 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:129, output treesize:18 [2021-06-05 05:00:09,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:09,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015285797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:09,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:09,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:00:09,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200685709] [2021-06-05 05:00:09,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:00:09,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:09,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:00:09,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:09,458 INFO L87 Difference]: Start difference. First operand 82 states and 170 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) [2021-06-05 05:00:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:09,800 INFO L93 Difference]: Finished difference Result 112 states and 218 transitions. [2021-06-05 05:00:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:00:09,800 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 [2021-06-05 05:00:09,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:09,800 INFO L225 Difference]: With dead ends: 112 [2021-06-05 05:00:09,800 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 05:00:09,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 351.9ms TimeCoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:00:09,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 05:00:09,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2021-06-05 05:00:09,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.0987654320987654) internal successors, (170), 81 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:09,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 170 transitions. [2021-06-05 05:00:09,802 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 170 transitions. Word has length 17 [2021-06-05 05:00:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:09,802 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 170 transitions. [2021-06-05 05:00:09,802 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) [2021-06-05 05:00:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 170 transitions. [2021-06-05 05:00:09,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:09,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:09,802 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:10,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4582 [2021-06-05 05:00:10,005 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:10,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:10,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1632288286, now seen corresponding path program 254 times [2021-06-05 05:00:10,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:10,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316951029] [2021-06-05 05:00:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:10,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:10,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316951029] [2021-06-05 05:00:10,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316951029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:10,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132265393] [2021-06-05 05:00:10,092 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 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 [2021-06-05 05:00:10,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:10,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:10,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:10,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:10,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:10,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:10,304 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 15 treesize of output 11 [2021-06-05 05:00:10,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:10,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:10,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:10,308 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 16 treesize of output 12 [2021-06-05 05:00:10,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:10,311 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 [2021-06-05 05:00:10,312 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:10,314 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 [2021-06-05 05:00:10,315 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:10,367 INFO L628 ElimStorePlain]: treesize reduction 36, result has 63.3 percent of original size [2021-06-05 05:00:10,367 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:10,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:00:10,368 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:127, output treesize:38 [2021-06-05 05:00:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:10,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132265393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:10,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:10,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:00:10,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944705764] [2021-06-05 05:00:10,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:00:10,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:10,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:00:10,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:10,444 INFO L87 Difference]: Start difference. First operand 82 states and 170 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) [2021-06-05 05:00:10,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:10,679 INFO L93 Difference]: Finished difference Result 105 states and 203 transitions. [2021-06-05 05:00:10,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:00:10,679 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 [2021-06-05 05:00:10,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:10,679 INFO L225 Difference]: With dead ends: 105 [2021-06-05 05:00:10,679 INFO L226 Difference]: Without dead ends: 103 [2021-06-05 05:00:10,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 290.5ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-06-05 05:00:10,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 81. [2021-06-05 05:00:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-06-05 05:00:10,680 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-06-05 05:00:10,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:10,681 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-06-05 05:00:10,681 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) [2021-06-05 05:00:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-06-05 05:00:10,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:10,681 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:10,681 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:10,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4592 [2021-06-05 05:00:10,896 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:10,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:10,897 INFO L82 PathProgramCache]: Analyzing trace with hash -184720843, now seen corresponding path program 255 times [2021-06-05 05:00:10,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:10,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093185313] [2021-06-05 05:00:10,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:10,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:10,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:10,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093185313] [2021-06-05 05:00:10,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093185313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:10,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983878803] [2021-06-05 05:00:10,998 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 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 [2021-06-05 05:00:11,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:00:11,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:11,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:11,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:11,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983878803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:11,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:11,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:11,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118342872] [2021-06-05 05:00:11,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:11,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:11,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:11,136 INFO L87 Difference]: Start difference. First operand 81 states and 167 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) [2021-06-05 05:00:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:11,292 INFO L93 Difference]: Finished difference Result 98 states and 197 transitions. [2021-06-05 05:00:11,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:11,292 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 [2021-06-05 05:00:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:11,292 INFO L225 Difference]: With dead ends: 98 [2021-06-05 05:00:11,292 INFO L226 Difference]: Without dead ends: 98 [2021-06-05 05:00:11,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 214.2ms TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-06-05 05:00:11,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2021-06-05 05:00:11,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.0875) internal successors, (167), 80 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:11,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 167 transitions. [2021-06-05 05:00:11,294 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 167 transitions. Word has length 17 [2021-06-05 05:00:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:11,294 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 167 transitions. [2021-06-05 05:00:11,294 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) [2021-06-05 05:00:11,294 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 167 transitions. [2021-06-05 05:00:11,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:11,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:11,294 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:11,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4614 [2021-06-05 05:00:11,494 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:11,495 INFO L82 PathProgramCache]: Analyzing trace with hash -556577130, now seen corresponding path program 256 times [2021-06-05 05:00:11,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:11,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676553645] [2021-06-05 05:00:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:11,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:11,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:11,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676553645] [2021-06-05 05:00:11,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676553645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:11,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637510413] [2021-06-05 05:00:11,599 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 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 [2021-06-05 05:00:11,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:11,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:11,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:11,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:11,893 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 [2021-06-05 05:00:11,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:11,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:11,898 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 15 treesize of output 11 [2021-06-05 05:00:11,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,901 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 [2021-06-05 05:00:11,902 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:11,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:11,906 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 [2021-06-05 05:00:11,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:11,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:11,917 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 15 treesize of output 11 [2021-06-05 05:00:11,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,921 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 [2021-06-05 05:00:11,922 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:11,994 INFO L628 ElimStorePlain]: treesize reduction 37, result has 70.9 percent of original size [2021-06-05 05:00:11,994 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:11,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 5 xjuncts. [2021-06-05 05:00:11,996 INFO L247 ElimStorePlain]: Needed 7 recursive calls to eliminate 6 variables, input treesize:170, output treesize:48 [2021-06-05 05:00:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:12,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637510413] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:12,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:12,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:00:12,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634468103] [2021-06-05 05:00:12,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:00:12,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:12,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:00:12,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:12,037 INFO L87 Difference]: Start difference. First operand 81 states and 167 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) [2021-06-05 05:00:12,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:12,218 INFO L93 Difference]: Finished difference Result 89 states and 177 transitions. [2021-06-05 05:00:12,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:12,219 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 [2021-06-05 05:00:12,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:12,219 INFO L225 Difference]: With dead ends: 89 [2021-06-05 05:00:12,219 INFO L226 Difference]: Without dead ends: 85 [2021-06-05 05:00:12,219 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 322.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:12,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-06-05 05:00:12,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-06-05 05:00:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 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) [2021-06-05 05:00:12,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-06-05 05:00:12,220 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 17 [2021-06-05 05:00:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:12,220 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-06-05 05:00:12,220 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) [2021-06-05 05:00:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-06-05 05:00:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:12,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:12,220 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:12,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4617,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:12,421 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:12,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:12,421 INFO L82 PathProgramCache]: Analyzing trace with hash 403024479, now seen corresponding path program 257 times [2021-06-05 05:00:12,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:12,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649804077] [2021-06-05 05:00:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:12,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:12,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:12,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649804077] [2021-06-05 05:00:12,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649804077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:12,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111831305] [2021-06-05 05:00:12,520 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 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 [2021-06-05 05:00:12,546 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:12,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:12,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:12,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:12,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111831305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:12,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:12,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:00:12,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474738227] [2021-06-05 05:00:12,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:00:12,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:12,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:00:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:00:12,645 INFO L87 Difference]: Start difference. First operand 80 states and 164 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) [2021-06-05 05:00:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:12,758 INFO L93 Difference]: Finished difference Result 91 states and 182 transitions. [2021-06-05 05:00:12,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:12,758 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 [2021-06-05 05:00:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:12,758 INFO L225 Difference]: With dead ends: 91 [2021-06-05 05:00:12,758 INFO L226 Difference]: Without dead ends: 91 [2021-06-05 05:00:12,758 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 172.0ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-06-05 05:00:12,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 74. [2021-06-05 05:00:12,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.041095890410959) internal successors, (149), 73 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) [2021-06-05 05:00:12,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 149 transitions. [2021-06-05 05:00:12,759 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 149 transitions. Word has length 17 [2021-06-05 05:00:12,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:12,759 INFO L482 AbstractCegarLoop]: Abstraction has 74 states and 149 transitions. [2021-06-05 05:00:12,759 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) [2021-06-05 05:00:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 149 transitions. [2021-06-05 05:00:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:12,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:12,760 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:12,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4646 [2021-06-05 05:00:12,960 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:12,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1569269662, now seen corresponding path program 258 times [2021-06-05 05:00:12,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:12,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567777798] [2021-06-05 05:00:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:12,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:13,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:13,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:13,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567777798] [2021-06-05 05:00:13,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567777798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:13,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788644199] [2021-06-05 05:00:13,067 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 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 [2021-06-05 05:00:13,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:00:13,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:13,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:13,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:13,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788644199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:13,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:13,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:00:13,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035650661] [2021-06-05 05:00:13,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:00:13,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:13,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:00:13,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:00:13,222 INFO L87 Difference]: Start difference. First operand 74 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) [2021-06-05 05:00:13,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:13,391 INFO L93 Difference]: Finished difference Result 80 states and 156 transitions. [2021-06-05 05:00:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:13,392 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 [2021-06-05 05:00:13,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:13,392 INFO L225 Difference]: With dead ends: 80 [2021-06-05 05:00:13,392 INFO L226 Difference]: Without dead ends: 74 [2021-06-05 05:00:13,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:00:13,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-06-05 05:00:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2021-06-05 05:00:13,393 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) [2021-06-05 05:00:13,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 144 transitions. [2021-06-05 05:00:13,393 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 144 transitions. Word has length 17 [2021-06-05 05:00:13,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:13,393 INFO L482 AbstractCegarLoop]: Abstraction has 72 states and 144 transitions. [2021-06-05 05:00:13,393 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) [2021-06-05 05:00:13,393 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 144 transitions. [2021-06-05 05:00:13,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:13,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:13,393 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:13,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4649,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:13,609 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:13,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:13,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1966083435, now seen corresponding path program 259 times [2021-06-05 05:00:13,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:13,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35214194] [2021-06-05 05:00:13,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:13,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:13,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:13,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:13,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35214194] [2021-06-05 05:00:13,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35214194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:13,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328432889] [2021-06-05 05:00:13,703 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 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 [2021-06-05 05:00:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:13,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:13,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:13,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:13,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:13,867 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 16 treesize of output 12 [2021-06-05 05:00:13,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:13,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:13,870 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 15 treesize of output 11 [2021-06-05 05:00:13,871 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:13,897 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:00:13,897 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:13,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:13,898 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:00:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:13,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328432889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:13,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:13,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:00:13,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951096580] [2021-06-05 05:00:13,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:00:13,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:00:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:00:13,949 INFO L87 Difference]: Start difference. First operand 72 states and 144 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) [2021-06-05 05:00:14,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:14,404 INFO L93 Difference]: Finished difference Result 108 states and 203 transitions. [2021-06-05 05:00:14,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:00:14,405 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 17 [2021-06-05 05:00:14,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:14,405 INFO L225 Difference]: With dead ends: 108 [2021-06-05 05:00:14,405 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 05:00:14,405 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 515.6ms TimeCoverageRelationStatistics Valid=105, Invalid=401, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:00:14,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 05:00:14,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 78. [2021-06-05 05:00:14,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2021-06-05 05:00:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 05:00:14,406 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 05:00:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:14,406 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 05:00:14,406 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) [2021-06-05 05:00:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 05:00:14,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:14,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:14,406 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:14,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4655,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:14,607 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:14,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1712928170, now seen corresponding path program 260 times [2021-06-05 05:00:14,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:14,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880514495] [2021-06-05 05:00:14,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:14,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:14,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880514495] [2021-06-05 05:00:14,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880514495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:14,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240966570] [2021-06-05 05:00:14,688 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 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 [2021-06-05 05:00:14,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:14,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:14,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:14,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:14,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:14,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:14,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:00:14,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:14,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:00:14,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:14,937 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:00:14,937 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:14,939 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 [2021-06-05 05:00:14,945 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:14,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:14,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_175 vanished before elimination [2021-06-05 05:00:14,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:14,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:00:15,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:15,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240966570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:15,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:15,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:00:15,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733893670] [2021-06-05 05:00:15,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:00:15,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:15,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:00:15,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:00:15,015 INFO L87 Difference]: Start difference. First operand 78 states and 158 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) [2021-06-05 05:00:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:15,352 INFO L93 Difference]: Finished difference Result 106 states and 204 transitions. [2021-06-05 05:00:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:00:15,352 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 [2021-06-05 05:00:15,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:15,352 INFO L225 Difference]: With dead ends: 106 [2021-06-05 05:00:15,352 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 05:00:15,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:00:15,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 05:00:15,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 78. [2021-06-05 05:00:15,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2021-06-05 05:00:15,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 05:00:15,354 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 05:00:15,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:15,354 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 05:00:15,354 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) [2021-06-05 05:00:15,354 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 05:00:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:15,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:15,354 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:15,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4665 [2021-06-05 05:00:15,554 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:15,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:15,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1265590447, now seen corresponding path program 261 times [2021-06-05 05:00:15,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:15,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122135953] [2021-06-05 05:00:15,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:15,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:15,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:15,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122135953] [2021-06-05 05:00:15,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122135953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:15,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176453494] [2021-06-05 05:00:15,632 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 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 [2021-06-05 05:00:15,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:00:15,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:15,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:15,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:15,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:15,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:15,775 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 15 treesize of output 11 [2021-06-05 05:00:15,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:15,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:15,778 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 [2021-06-05 05:00:15,779 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:15,804 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:00:15,804 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:15,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:15,805 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:00:15,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:15,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176453494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:15,857 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:15,857 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:00:15,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788993093] [2021-06-05 05:00:15,857 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:00:15,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:15,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:00:15,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:00:15,858 INFO L87 Difference]: Start difference. First operand 78 states and 158 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) [2021-06-05 05:00:16,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:16,251 INFO L93 Difference]: Finished difference Result 112 states and 214 transitions. [2021-06-05 05:00:16,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:00:16,252 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 [2021-06-05 05:00:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:16,252 INFO L225 Difference]: With dead ends: 112 [2021-06-05 05:00:16,252 INFO L226 Difference]: Without dead ends: 112 [2021-06-05 05:00:16,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 453.3ms TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:00:16,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-06-05 05:00:16,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 78. [2021-06-05 05:00:16,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 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) [2021-06-05 05:00:16,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 158 transitions. [2021-06-05 05:00:16,253 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 158 transitions. Word has length 17 [2021-06-05 05:00:16,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:16,253 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 158 transitions. [2021-06-05 05:00:16,253 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) [2021-06-05 05:00:16,253 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 158 transitions. [2021-06-05 05:00:16,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:16,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:16,254 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:16,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4676,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:16,454 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash -717206798, now seen corresponding path program 262 times [2021-06-05 05:00:16,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:16,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230358528] [2021-06-05 05:00:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:16,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:16,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230358528] [2021-06-05 05:00:16,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230358528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:16,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068479089] [2021-06-05 05:00:16,541 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 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 [2021-06-05 05:00:16,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:16,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:16,736 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 [2021-06-05 05:00:16,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:16,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:16,739 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 16 treesize of output 12 [2021-06-05 05:00:16,740 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:16,780 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:00:16,780 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:16,782 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 [2021-06-05 05:00:16,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:16,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:16,797 INFO L518 ElimStorePlain]: Eliminatee v_prenex_178 vanished before elimination [2021-06-05 05:00:16,798 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:00:16,798 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:00:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068479089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:16,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:16,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-06-05 05:00:16,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314197105] [2021-06-05 05:00:16,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:00:16,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:00:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:00:16,946 INFO L87 Difference]: Start difference. First operand 78 states and 158 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) [2021-06-05 05:00:17,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:17,522 INFO L93 Difference]: Finished difference Result 108 states and 205 transitions. [2021-06-05 05:00:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:17,522 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 [2021-06-05 05:00:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:17,522 INFO L225 Difference]: With dead ends: 108 [2021-06-05 05:00:17,522 INFO L226 Difference]: Without dead ends: 106 [2021-06-05 05:00:17,523 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 611.1ms TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:00:17,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-06-05 05:00:17,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-06-05 05:00:17,523 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) [2021-06-05 05:00:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 05:00:17,524 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 05:00:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:17,524 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 05:00:17,524 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) [2021-06-05 05:00:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 05:00:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:17,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:17,524 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:17,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4684 [2021-06-05 05:00:17,724 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:17,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:17,725 INFO L82 PathProgramCache]: Analyzing trace with hash 730360645, now seen corresponding path program 263 times [2021-06-05 05:00:17,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:17,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788040404] [2021-06-05 05:00:17,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:17,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:17,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788040404] [2021-06-05 05:00:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788040404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674669677] [2021-06-05 05:00:17,834 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 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 [2021-06-05 05:00:17,864 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:17,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:17,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:17,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:17,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674669677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:17,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:17,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:00:17,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122417932] [2021-06-05 05:00:17,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:00:17,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:17,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:00:17,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:17,989 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 05:00:18,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:18,146 INFO L93 Difference]: Finished difference Result 94 states and 185 transitions. [2021-06-05 05:00:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 05:00:18,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:18,146 INFO L225 Difference]: With dead ends: 94 [2021-06-05 05:00:18,146 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 05:00:18,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:00:18,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 05:00:18,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2021-06-05 05:00:18,147 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) [2021-06-05 05:00:18,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 155 transitions. [2021-06-05 05:00:18,147 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 155 transitions. Word has length 17 [2021-06-05 05:00:18,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:18,147 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 155 transitions. [2021-06-05 05:00:18,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 05:00:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 155 transitions. [2021-06-05 05:00:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:18,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:18,148 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:18,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4698,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:18,348 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:18,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:18,348 INFO L82 PathProgramCache]: Analyzing trace with hash 358504358, now seen corresponding path program 264 times [2021-06-05 05:00:18,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:18,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519630983] [2021-06-05 05:00:18,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:18,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:18,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:18,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:18,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519630983] [2021-06-05 05:00:18,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519630983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:18,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515012426] [2021-06-05 05:00:18,454 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 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 [2021-06-05 05:00:18,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:00:18,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:18,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:18,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:18,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515012426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:18,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:18,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-05 05:00:18,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051748479] [2021-06-05 05:00:18,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:00:18,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:18,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:00:18,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:00:18,664 INFO L87 Difference]: Start difference. First operand 77 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 05:00:19,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:19,025 INFO L93 Difference]: Finished difference Result 100 states and 187 transitions. [2021-06-05 05:00:19,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:00:19,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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 [2021-06-05 05:00:19,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:19,026 INFO L225 Difference]: With dead ends: 100 [2021-06-05 05:00:19,026 INFO L226 Difference]: Without dead ends: 96 [2021-06-05 05:00:19,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 422.9ms TimeCoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:00:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-06-05 05:00:19,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 76. [2021-06-05 05:00:19,027 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) [2021-06-05 05:00:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 05:00:19,027 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 05:00:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:19,027 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 05:00:19,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 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) [2021-06-05 05:00:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 05:00:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:19,027 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:19,027 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:19,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4701 [2021-06-05 05:00:19,228 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:19,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1318105967, now seen corresponding path program 265 times [2021-06-05 05:00:19,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:19,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521224829] [2021-06-05 05:00:19,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:19,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:19,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521224829] [2021-06-05 05:00:19,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521224829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167544186] [2021-06-05 05:00:19,333 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 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 [2021-06-05 05:00:19,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:19,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:19,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:19,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167544186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:19,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:19,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:19,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795353519] [2021-06-05 05:00:19,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:19,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:19,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:19,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:19,479 INFO L87 Difference]: Start difference. First operand 76 states and 152 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) [2021-06-05 05:00:19,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:19,667 INFO L93 Difference]: Finished difference Result 95 states and 188 transitions. [2021-06-05 05:00:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:19,667 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 [2021-06-05 05:00:19,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:19,667 INFO L225 Difference]: With dead ends: 95 [2021-06-05 05:00:19,667 INFO L226 Difference]: Without dead ends: 95 [2021-06-05 05:00:19,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 235.3ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:00:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-05 05:00:19,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2021-06-05 05:00:19,668 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) [2021-06-05 05:00:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 152 transitions. [2021-06-05 05:00:19,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 152 transitions. Word has length 17 [2021-06-05 05:00:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:19,668 INFO L482 AbstractCegarLoop]: Abstraction has 76 states and 152 transitions. [2021-06-05 05:00:19,668 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) [2021-06-05 05:00:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 152 transitions. [2021-06-05 05:00:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:19,669 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:19,669 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:19,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4707 [2021-06-05 05:00:19,869 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -654188174, now seen corresponding path program 266 times [2021-06-05 05:00:19,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:19,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781170776] [2021-06-05 05:00:19,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:19,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:19,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781170776] [2021-06-05 05:00:19,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781170776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:19,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436371862] [2021-06-05 05:00:19,962 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 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 [2021-06-05 05:00:19,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:19,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:19,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:19,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:20,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:20,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436371862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:20,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:20,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-05 05:00:20,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546314123] [2021-06-05 05:00:20,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:00:20,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:20,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:00:20,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:00:20,122 INFO L87 Difference]: Start difference. First operand 76 states and 152 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) [2021-06-05 05:00:20,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:20,452 INFO L93 Difference]: Finished difference Result 100 states and 185 transitions. [2021-06-05 05:00:20,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:00:20,453 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 [2021-06-05 05:00:20,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:20,453 INFO L225 Difference]: With dead ends: 100 [2021-06-05 05:00:20,453 INFO L226 Difference]: Without dead ends: 94 [2021-06-05 05:00:20,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:00:20,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-06-05 05:00:20,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2021-06-05 05:00:20,454 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) [2021-06-05 05:00:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 149 transitions. [2021-06-05 05:00:20,454 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 149 transitions. Word has length 17 [2021-06-05 05:00:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:20,454 INFO L482 AbstractCegarLoop]: Abstraction has 75 states and 149 transitions. [2021-06-05 05:00:20,454 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) [2021-06-05 05:00:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 149 transitions. [2021-06-05 05:00:20,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:20,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:20,455 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:20,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4710,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:20,655 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:20,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:20,655 INFO L82 PathProgramCache]: Analyzing trace with hash -453490593, now seen corresponding path program 267 times [2021-06-05 05:00:20,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:20,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908887744] [2021-06-05 05:00:20,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:20,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:20,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908887744] [2021-06-05 05:00:20,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908887744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:20,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114320841] [2021-06-05 05:00:20,745 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 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 [2021-06-05 05:00:20,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:00:20,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:20,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:20,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:20,911 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:20,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114320841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:20,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:20,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:00:20,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041247075] [2021-06-05 05:00:20,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:00:20,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:20,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:00:20,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:00:20,912 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) [2021-06-05 05:00:21,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:21,126 INFO L93 Difference]: Finished difference Result 104 states and 194 transitions. [2021-06-05 05:00:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:00:21,127 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 [2021-06-05 05:00:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:21,127 INFO L225 Difference]: With dead ends: 104 [2021-06-05 05:00:21,127 INFO L226 Difference]: Without dead ends: 104 [2021-06-05 05:00:21,127 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 278.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:00:21,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-06-05 05:00:21,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 67. [2021-06-05 05:00:21,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.9848484848484849) internal successors, (131), 66 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) [2021-06-05 05:00:21,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 131 transitions. [2021-06-05 05:00:21,128 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 131 transitions. Word has length 17 [2021-06-05 05:00:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:21,128 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 131 transitions. [2021-06-05 05:00:21,128 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) [2021-06-05 05:00:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 131 transitions. [2021-06-05 05:00:21,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 05:00:21,128 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:21,128 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:21,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4717 [2021-06-05 05:00:21,329 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash -499750656, now seen corresponding path program 268 times [2021-06-05 05:00:21,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:21,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535519067] [2021-06-05 05:00:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:21,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:21,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:21,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535519067] [2021-06-05 05:00:21,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535519067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:21,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021495565] [2021-06-05 05:00:21,415 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 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 [2021-06-05 05:00:21,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:21,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:21,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 05:00:21,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:21,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021495565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:21,559 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:21,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:00:21,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159910327] [2021-06-05 05:00:21,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:00:21,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:00:21,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:00:21,559 INFO L87 Difference]: Start difference. First operand 67 states and 131 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) [2021-06-05 05:00:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:21,812 INFO L93 Difference]: Finished difference Result 75 states and 141 transitions. [2021-06-05 05:00:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:00:21,812 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 [2021-06-05 05:00:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:21,812 INFO L225 Difference]: With dead ends: 75 [2021-06-05 05:00:21,813 INFO L226 Difference]: Without dead ends: 67 [2021-06-05 05:00:21,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 320.5ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:21,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-06-05 05:00:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-06-05 05:00:21,813 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) [2021-06-05 05:00:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 130 transitions. [2021-06-05 05:00:21,813 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 130 transitions. Word has length 17 [2021-06-05 05:00:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:21,814 INFO L482 AbstractCegarLoop]: Abstraction has 67 states and 130 transitions. [2021-06-05 05:00:21,814 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) [2021-06-05 05:00:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 130 transitions. [2021-06-05 05:00:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:21,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:21,814 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:22,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4720,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:22,014 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:22,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:22,015 INFO L82 PathProgramCache]: Analyzing trace with hash -287533742, now seen corresponding path program 269 times [2021-06-05 05:00:22,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:22,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215290477] [2021-06-05 05:00:22,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:22,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:22,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:22,225 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:22,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215290477] [2021-06-05 05:00:22,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215290477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:22,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271442884] [2021-06-05 05:00:22,225 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 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 [2021-06-05 05:00:22,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:22,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:22,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:22,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:22,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271442884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:22,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:22,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:00:22,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011415077] [2021-06-05 05:00:22,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:00:22,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:22,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:00:22,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:22,446 INFO L87 Difference]: Start difference. First operand 67 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) [2021-06-05 05:00:23,043 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-06-05 05:00:23,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:23,054 INFO L93 Difference]: Finished difference Result 120 states and 226 transitions. [2021-06-05 05:00:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:23,054 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 18 [2021-06-05 05:00:23,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:23,054 INFO L225 Difference]: With dead ends: 120 [2021-06-05 05:00:23,054 INFO L226 Difference]: Without dead ends: 113 [2021-06-05 05:00:23,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 789.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:00:23,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-06-05 05:00:23,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-06-05 05:00:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 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) [2021-06-05 05:00:23,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 149 transitions. [2021-06-05 05:00:23,056 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 149 transitions. Word has length 18 [2021-06-05 05:00:23,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:23,056 INFO L482 AbstractCegarLoop]: Abstraction has 77 states and 149 transitions. [2021-06-05 05:00:23,056 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) [2021-06-05 05:00:23,056 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 149 transitions. [2021-06-05 05:00:23,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:23,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:23,056 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:23,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4726 [2021-06-05 05:00:23,257 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:23,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:23,257 INFO L82 PathProgramCache]: Analyzing trace with hash -277178606, now seen corresponding path program 270 times [2021-06-05 05:00:23,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:23,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401635374] [2021-06-05 05:00:23,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:23,455 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:23,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:23,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401635374] [2021-06-05 05:00:23,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401635374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:23,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847889997] [2021-06-05 05:00:23,455 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 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 [2021-06-05 05:00:23,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:00:23,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:23,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:23,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847889997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:23,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:23,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:00:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738743695] [2021-06-05 05:00:23,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:23,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:23,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:23,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:23,725 INFO L87 Difference]: Start difference. First operand 77 states and 149 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) [2021-06-05 05:00:24,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:24,219 INFO L93 Difference]: Finished difference Result 124 states and 234 transitions. [2021-06-05 05:00:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:24,219 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 18 [2021-06-05 05:00:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:24,220 INFO L225 Difference]: With dead ends: 124 [2021-06-05 05:00:24,220 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 05:00:24,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 651.9ms TimeCoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:00:24,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 05:00:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 78. [2021-06-05 05:00:24,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.974025974025974) internal successors, (152), 77 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) [2021-06-05 05:00:24,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 152 transitions. [2021-06-05 05:00:24,221 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 152 transitions. Word has length 18 [2021-06-05 05:00:24,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:24,221 INFO L482 AbstractCegarLoop]: Abstraction has 78 states and 152 transitions. [2021-06-05 05:00:24,221 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) [2021-06-05 05:00:24,221 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 152 transitions. [2021-06-05 05:00:24,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:24,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:24,221 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:24,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4739,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:24,422 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash 858925398, now seen corresponding path program 271 times [2021-06-05 05:00:24,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:24,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494089969] [2021-06-05 05:00:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:24,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:24,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:24,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494089969] [2021-06-05 05:00:24,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494089969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:24,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464456535] [2021-06-05 05:00:24,607 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 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 [2021-06-05 05:00:24,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:24,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:24,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:24,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464456535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:24,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:24,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:00:24,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050255404] [2021-06-05 05:00:24,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:00:24,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:24,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:00:24,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:24,867 INFO L87 Difference]: Start difference. First operand 78 states and 152 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:00:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:25,297 INFO L93 Difference]: Finished difference Result 125 states and 237 transitions. [2021-06-05 05:00:25,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:00:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:25,297 INFO L225 Difference]: With dead ends: 125 [2021-06-05 05:00:25,297 INFO L226 Difference]: Without dead ends: 118 [2021-06-05 05:00:25,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 553.7ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:00:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-06-05 05:00:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-06-05 05:00:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.9871794871794872) internal successors, (155), 78 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) [2021-06-05 05:00:25,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 155 transitions. [2021-06-05 05:00:25,298 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 155 transitions. Word has length 18 [2021-06-05 05:00:25,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:25,298 INFO L482 AbstractCegarLoop]: Abstraction has 79 states and 155 transitions. [2021-06-05 05:00:25,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:00:25,298 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 155 transitions. [2021-06-05 05:00:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:25,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:25,299 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:25,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4753,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:25,509 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash 618479250, now seen corresponding path program 272 times [2021-06-05 05:00:25,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:25,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44614040] [2021-06-05 05:00:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:25,845 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:25,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:25,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44614040] [2021-06-05 05:00:25,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44614040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:25,846 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724803924] [2021-06-05 05:00:25,846 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 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 [2021-06-05 05:00:25,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:25,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:25,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:25,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:26,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724803924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:26,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:26,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:00:26,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386592819] [2021-06-05 05:00:26,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:26,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:26,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:26,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:26,121 INFO L87 Difference]: Start difference. First operand 79 states and 155 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) [2021-06-05 05:00:26,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:26,487 INFO L93 Difference]: Finished difference Result 126 states and 240 transitions. [2021-06-05 05:00:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:26,487 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 18 [2021-06-05 05:00:26,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:26,487 INFO L225 Difference]: With dead ends: 126 [2021-06-05 05:00:26,487 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 05:00:26,487 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 652.1ms TimeCoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:00:26,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 05:00:26,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 80. [2021-06-05 05:00:26,488 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) [2021-06-05 05:00:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 158 transitions. [2021-06-05 05:00:26,488 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 158 transitions. Word has length 18 [2021-06-05 05:00:26,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:26,489 INFO L482 AbstractCegarLoop]: Abstraction has 80 states and 158 transitions. [2021-06-05 05:00:26,489 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) [2021-06-05 05:00:26,489 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 158 transitions. [2021-06-05 05:00:26,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:26,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:26,489 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:26,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4767 [2021-06-05 05:00:26,689 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:26,690 INFO L82 PathProgramCache]: Analyzing trace with hash -82013738, now seen corresponding path program 273 times [2021-06-05 05:00:26,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:26,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089097567] [2021-06-05 05:00:26,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:26,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:26,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089097567] [2021-06-05 05:00:26,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089097567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:26,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192003398] [2021-06-05 05:00:26,898 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 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 [2021-06-05 05:00:26,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:00:26,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:26,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:26,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:27,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:27,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192003398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:27,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:27,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 05:00:27,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754920542] [2021-06-05 05:00:27,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:00:27,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:27,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:00:27,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:00:27,130 INFO L87 Difference]: Start difference. First operand 80 states and 158 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:00:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:27,492 INFO L93 Difference]: Finished difference Result 138 states and 259 transitions. [2021-06-05 05:00:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 18 [2021-06-05 05:00:27,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:27,492 INFO L225 Difference]: With dead ends: 138 [2021-06-05 05:00:27,492 INFO L226 Difference]: Without dead ends: 131 [2021-06-05 05:00:27,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 502.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:27,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-06-05 05:00:27,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 81. [2021-06-05 05:00:27,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 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) [2021-06-05 05:00:27,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 05:00:27,493 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 05:00:27,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:27,494 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 05:00:27,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:00:27,494 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 05:00:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:27,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:27,494 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:27,694 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4778,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:27,694 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:27,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:27,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1609570898, now seen corresponding path program 274 times [2021-06-05 05:00:27,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:27,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995752235] [2021-06-05 05:00:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:27,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:27,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:27,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995752235] [2021-06-05 05:00:27,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995752235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:27,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297508965] [2021-06-05 05:00:27,868 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 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 [2021-06-05 05:00:27,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:27,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:27,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:28,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297508965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:28,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:28,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 05:00:28,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799800641] [2021-06-05 05:00:28,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:00:28,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:28,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:00:28,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:00:28,104 INFO L87 Difference]: Start difference. First operand 81 states and 162 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:00:28,411 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 43 [2021-06-05 05:00:28,539 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-06-05 05:00:28,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:28,553 INFO L93 Difference]: Finished difference Result 126 states and 241 transitions. [2021-06-05 05:00:28,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:28,553 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 18 [2021-06-05 05:00:28,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:28,553 INFO L225 Difference]: With dead ends: 126 [2021-06-05 05:00:28,553 INFO L226 Difference]: Without dead ends: 119 [2021-06-05 05:00:28,554 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 571.5ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-06-05 05:00:28,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 81. [2021-06-05 05:00:28,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.025) internal successors, (162), 80 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) [2021-06-05 05:00:28,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 162 transitions. [2021-06-05 05:00:28,555 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 162 transitions. Word has length 18 [2021-06-05 05:00:28,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:28,555 INFO L482 AbstractCegarLoop]: Abstraction has 81 states and 162 transitions. [2021-06-05 05:00:28,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:00:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 162 transitions. [2021-06-05 05:00:28,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:28,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:28,555 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:28,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4790 [2021-06-05 05:00:28,771 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:28,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:28,771 INFO L82 PathProgramCache]: Analyzing trace with hash 628775332, now seen corresponding path program 275 times [2021-06-05 05:00:28,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:28,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648992449] [2021-06-05 05:00:28,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:28,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:29,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:29,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648992449] [2021-06-05 05:00:29,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648992449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:29,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902616982] [2021-06-05 05:00:29,154 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 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 [2021-06-05 05:00:29,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:29,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:29,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902616982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:29,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:29,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:00:29,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020726913] [2021-06-05 05:00:29,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:29,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=303, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:29,644 INFO L87 Difference]: Start difference. First operand 81 states and 162 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) [2021-06-05 05:00:30,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:30,272 INFO L93 Difference]: Finished difference Result 104 states and 201 transitions. [2021-06-05 05:00:30,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:30,272 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 [2021-06-05 05:00:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:30,273 INFO L225 Difference]: With dead ends: 104 [2021-06-05 05:00:30,273 INFO L226 Difference]: Without dead ends: 97 [2021-06-05 05:00:30,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1010.4ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:00:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-06-05 05:00:30,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 83. [2021-06-05 05:00:30,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 2.0365853658536586) internal successors, (167), 82 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:30,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 167 transitions. [2021-06-05 05:00:30,274 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 167 transitions. Word has length 18 [2021-06-05 05:00:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:30,274 INFO L482 AbstractCegarLoop]: Abstraction has 83 states and 167 transitions. [2021-06-05 05:00:30,274 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) [2021-06-05 05:00:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 167 transitions. [2021-06-05 05:00:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:30,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:30,274 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:30,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4803,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:30,490 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:30,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:30,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1764879336, now seen corresponding path program 276 times [2021-06-05 05:00:30,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:30,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530869551] [2021-06-05 05:00:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:30,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:30,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530869551] [2021-06-05 05:00:30,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530869551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:30,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2868063] [2021-06-05 05:00:30,663 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 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 [2021-06-05 05:00:30,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:00:30,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:30,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:30,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:31,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2868063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:31,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:31,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:00:31,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058490435] [2021-06-05 05:00:31,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:00:31,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:31,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:00:31,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:31,070 INFO L87 Difference]: Start difference. First operand 83 states and 167 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) [2021-06-05 05:00:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:31,379 INFO L93 Difference]: Finished difference Result 108 states and 209 transitions. [2021-06-05 05:00:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:31,380 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 18 [2021-06-05 05:00:31,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:31,380 INFO L225 Difference]: With dead ends: 108 [2021-06-05 05:00:31,380 INFO L226 Difference]: Without dead ends: 101 [2021-06-05 05:00:31,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:00:31,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-06-05 05:00:31,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 84. [2021-06-05 05:00:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.0481927710843375) internal successors, (170), 83 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 170 transitions. [2021-06-05 05:00:31,381 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 170 transitions. Word has length 18 [2021-06-05 05:00:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:31,381 INFO L482 AbstractCegarLoop]: Abstraction has 84 states and 170 transitions. [2021-06-05 05:00:31,381 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) [2021-06-05 05:00:31,381 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 170 transitions. [2021-06-05 05:00:31,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:31,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:31,382 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:31,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4850,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:31,587 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:31,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:31,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1524433188, now seen corresponding path program 277 times [2021-06-05 05:00:31,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:31,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043083978] [2021-06-05 05:00:31,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:31,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043083978] [2021-06-05 05:00:31,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043083978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:31,828 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208866741] [2021-06-05 05:00:31,828 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 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 [2021-06-05 05:00:31,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:31,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:31,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:32,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208866741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:32,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:32,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:00:32,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056707622] [2021-06-05 05:00:32,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:32,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:32,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:32,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:32,226 INFO L87 Difference]: Start difference. First operand 84 states and 170 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:00:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:32,535 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 05:00:32,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:32,535 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:00:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:32,536 INFO L225 Difference]: With dead ends: 109 [2021-06-05 05:00:32,536 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 05:00:32,536 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 559.1ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:32,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 05:00:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 85. [2021-06-05 05:00:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.0595238095238093) internal successors, (173), 84 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:32,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 173 transitions. [2021-06-05 05:00:32,537 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 173 transitions. Word has length 18 [2021-06-05 05:00:32,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:32,537 INFO L482 AbstractCegarLoop]: Abstraction has 85 states and 173 transitions. [2021-06-05 05:00:32,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:00:32,537 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 173 transitions. [2021-06-05 05:00:32,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:32,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:32,537 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:32,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4897,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:32,738 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:32,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:32,738 INFO L82 PathProgramCache]: Analyzing trace with hash 823940200, now seen corresponding path program 278 times [2021-06-05 05:00:32,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:32,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776872427] [2021-06-05 05:00:32,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:32,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:32,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:32,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:32,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776872427] [2021-06-05 05:00:32,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776872427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:32,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192984352] [2021-06-05 05:00:32,939 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 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 [2021-06-05 05:00:32,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:32,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:32,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:32,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:33,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192984352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:33,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:33,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:00:33,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749161830] [2021-06-05 05:00:33,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:33,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:33,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:33,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:33,458 INFO L87 Difference]: Start difference. First operand 85 states and 173 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) [2021-06-05 05:00:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:34,134 INFO L93 Difference]: Finished difference Result 121 states and 228 transitions. [2021-06-05 05:00:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:34,134 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 [2021-06-05 05:00:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:34,135 INFO L225 Difference]: With dead ends: 121 [2021-06-05 05:00:34,135 INFO L226 Difference]: Without dead ends: 111 [2021-06-05 05:00:34,135 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 831.3ms TimeCoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:00:34,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-06-05 05:00:34,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 86. [2021-06-05 05:00:34,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 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) [2021-06-05 05:00:34,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-06-05 05:00:34,136 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-06-05 05:00:34,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:34,136 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-06-05 05:00:34,136 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) [2021-06-05 05:00:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-06-05 05:00:34,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:34,136 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:34,136 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:34,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4931,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:34,337 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:34,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1779442460, now seen corresponding path program 279 times [2021-06-05 05:00:34,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:34,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192289581] [2021-06-05 05:00:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:34,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:34,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:34,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:34,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192289581] [2021-06-05 05:00:34,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192289581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:34,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454570544] [2021-06-05 05:00:34,636 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 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 [2021-06-05 05:00:34,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:00:34,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:34,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:34,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:35,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454570544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:35,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:35,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:00:35,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245983818] [2021-06-05 05:00:35,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:35,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:35,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:35,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:35,031 INFO L87 Difference]: Start difference. First operand 86 states and 176 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) [2021-06-05 05:00:35,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:35,441 INFO L93 Difference]: Finished difference Result 109 states and 212 transitions. [2021-06-05 05:00:35,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:00:35,442 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 18 [2021-06-05 05:00:35,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:35,442 INFO L225 Difference]: With dead ends: 109 [2021-06-05 05:00:35,442 INFO L226 Difference]: Without dead ends: 102 [2021-06-05 05:00:35,442 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 656.2ms TimeCoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:35,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-06-05 05:00:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 86. [2021-06-05 05:00:35,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.070588235294118) internal successors, (176), 85 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) [2021-06-05 05:00:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 176 transitions. [2021-06-05 05:00:35,444 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 176 transitions. Word has length 18 [2021-06-05 05:00:35,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:35,444 INFO L482 AbstractCegarLoop]: Abstraction has 86 states and 176 transitions. [2021-06-05 05:00:35,444 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) [2021-06-05 05:00:35,444 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 176 transitions. [2021-06-05 05:00:35,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:35,444 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:35,444 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:35,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4977 [2021-06-05 05:00:35,661 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:35,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:35,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1489852162, now seen corresponding path program 280 times [2021-06-05 05:00:35,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:35,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004439625] [2021-06-05 05:00:35,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:35,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:35,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:35,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004439625] [2021-06-05 05:00:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004439625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:35,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622167306] [2021-06-05 05:00:35,825 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 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 [2021-06-05 05:00:35,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:35,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:35,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:35,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:36,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622167306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:36,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:36,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:00:36,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61905203] [2021-06-05 05:00:36,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:36,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:36,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:36,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:36,233 INFO L87 Difference]: Start difference. First operand 86 states and 176 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:00:36,539 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 63 [2021-06-05 05:00:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:36,858 INFO L93 Difference]: Finished difference Result 158 states and 302 transitions. [2021-06-05 05:00:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:36,858 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:00:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:36,858 INFO L225 Difference]: With dead ends: 158 [2021-06-05 05:00:36,858 INFO L226 Difference]: Without dead ends: 151 [2021-06-05 05:00:36,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 716.7ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:00:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-06-05 05:00:36,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 103. [2021-06-05 05:00:36,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 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) [2021-06-05 05:00:36,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 05:00:36,860 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 05:00:36,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:36,860 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 05:00:36,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:00:36,860 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 05:00:36,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:36,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:36,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:37,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5023 [2021-06-05 05:00:37,061 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:37,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:37,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1730298310, now seen corresponding path program 281 times [2021-06-05 05:00:37,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:37,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720438063] [2021-06-05 05:00:37,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:37,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:37,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:37,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720438063] [2021-06-05 05:00:37,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720438063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:37,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419724960] [2021-06-05 05:00:37,242 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 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 [2021-06-05 05:00:37,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:37,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:37,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:37,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:37,612 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:37,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419724960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:37,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:37,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:00:37,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698166248] [2021-06-05 05:00:37,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:00:37,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:37,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:00:37,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:37,613 INFO L87 Difference]: Start difference. First operand 103 states and 220 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) [2021-06-05 05:00:38,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:38,217 INFO L93 Difference]: Finished difference Result 159 states and 304 transitions. [2021-06-05 05:00:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:38,217 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 18 [2021-06-05 05:00:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:38,218 INFO L225 Difference]: With dead ends: 159 [2021-06-05 05:00:38,218 INFO L226 Difference]: Without dead ends: 152 [2021-06-05 05:00:38,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 710.9ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:00:38,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-06-05 05:00:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2021-06-05 05:00:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 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) [2021-06-05 05:00:38,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 05:00:38,219 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 05:00:38,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:38,219 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 05:00:38,219 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) [2021-06-05 05:00:38,219 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 05:00:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:38,219 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:38,219 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:38,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5057 [2021-06-05 05:00:38,420 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:38,420 INFO L82 PathProgramCache]: Analyzing trace with hash 1864175998, now seen corresponding path program 282 times [2021-06-05 05:00:38,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:38,420 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136912290] [2021-06-05 05:00:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:38,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:38,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136912290] [2021-06-05 05:00:38,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136912290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:38,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909557941] [2021-06-05 05:00:38,573 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 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 [2021-06-05 05:00:38,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:00:38,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:38,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:38,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:38,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:38,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909557941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:38,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:38,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:00:38,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609746811] [2021-06-05 05:00:38,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:00:38,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:38,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:00:38,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:38,909 INFO L87 Difference]: Start difference. First operand 103 states and 220 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:39,458 INFO L93 Difference]: Finished difference Result 160 states and 307 transitions. [2021-06-05 05:00:39,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:39,458 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:00:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:39,458 INFO L225 Difference]: With dead ends: 160 [2021-06-05 05:00:39,458 INFO L226 Difference]: Without dead ends: 153 [2021-06-05 05:00:39,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:00:39,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-06-05 05:00:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2021-06-05 05:00:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.174757281553398) internal successors, (224), 103 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) [2021-06-05 05:00:39,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 224 transitions. [2021-06-05 05:00:39,460 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 224 transitions. Word has length 18 [2021-06-05 05:00:39,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:39,460 INFO L482 AbstractCegarLoop]: Abstraction has 104 states and 224 transitions. [2021-06-05 05:00:39,460 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:39,460 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 224 transitions. [2021-06-05 05:00:39,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:39,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:39,460 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:39,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5092,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:39,661 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:39,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:39,661 INFO L82 PathProgramCache]: Analyzing trace with hash -739206662, now seen corresponding path program 283 times [2021-06-05 05:00:39,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:39,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611606751] [2021-06-05 05:00:39,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:39,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:39,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:39,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611606751] [2021-06-05 05:00:39,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611606751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:39,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740271074] [2021-06-05 05:00:39,835 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 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 [2021-06-05 05:00:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:39,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:39,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:40,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740271074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:40,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:40,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:00:40,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371798709] [2021-06-05 05:00:40,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:00:40,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:40,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:00:40,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:40,220 INFO L87 Difference]: Start difference. First operand 104 states and 224 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:40,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:40,798 INFO L93 Difference]: Finished difference Result 148 states and 289 transitions. [2021-06-05 05:00:40,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:40,798 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:00:40,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:40,798 INFO L225 Difference]: With dead ends: 148 [2021-06-05 05:00:40,798 INFO L226 Difference]: Without dead ends: 141 [2021-06-05 05:00:40,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 596.2ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:00:40,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-06-05 05:00:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-06-05 05:00:40,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.156862745098039) internal successors, (220), 102 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) [2021-06-05 05:00:40,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 220 transitions. [2021-06-05 05:00:40,800 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 220 transitions. Word has length 18 [2021-06-05 05:00:40,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:40,800 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 220 transitions. [2021-06-05 05:00:40,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 220 transitions. [2021-06-05 05:00:40,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:40,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:40,800 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:41,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5138,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:41,000 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:41,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:41,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1142552988, now seen corresponding path program 284 times [2021-06-05 05:00:41,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:41,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269106719] [2021-06-05 05:00:41,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:41,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:41,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:41,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269106719] [2021-06-05 05:00:41,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269106719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:41,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535109063] [2021-06-05 05:00:41,185 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 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 [2021-06-05 05:00:41,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:41,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:41,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:41,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:41,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535109063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:41,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:41,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:00:41,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563469063] [2021-06-05 05:00:41,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:00:41,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:41,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:00:41,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:41,610 INFO L87 Difference]: Start difference. First operand 103 states and 220 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) [2021-06-05 05:00:42,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:42,266 INFO L93 Difference]: Finished difference Result 210 states and 415 transitions. [2021-06-05 05:00:42,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:00:42,266 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 18 [2021-06-05 05:00:42,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:42,266 INFO L225 Difference]: With dead ends: 210 [2021-06-05 05:00:42,267 INFO L226 Difference]: Without dead ends: 203 [2021-06-05 05:00:42,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 743.6ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:00:42,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-05 05:00:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 118. [2021-06-05 05:00:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 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) [2021-06-05 05:00:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-06-05 05:00:42,268 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-06-05 05:00:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:42,268 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-06-05 05:00:42,268 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) [2021-06-05 05:00:42,268 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-06-05 05:00:42,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:42,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:42,269 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:42,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5185 [2021-06-05 05:00:42,477 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:42,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:42,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1843045976, now seen corresponding path program 285 times [2021-06-05 05:00:42,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:42,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62059845] [2021-06-05 05:00:42,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:42,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:42,731 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:42,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62059845] [2021-06-05 05:00:42,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62059845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:42,731 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46000394] [2021-06-05 05:00:42,731 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 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 [2021-06-05 05:00:42,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:00:42,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:42,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:42,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:43,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:43,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46000394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:43,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:43,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:00:43,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373788487] [2021-06-05 05:00:43,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:00:43,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:43,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:00:43,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:43,081 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:43,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:43,688 INFO L93 Difference]: Finished difference Result 227 states and 443 transitions. [2021-06-05 05:00:43,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:00:43,688 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:00:43,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:43,689 INFO L225 Difference]: With dead ends: 227 [2021-06-05 05:00:43,689 INFO L226 Difference]: Without dead ends: 220 [2021-06-05 05:00:43,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 711.6ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:00:43,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-06-05 05:00:43,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 119. [2021-06-05 05:00:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.2711864406779663) internal successors, (268), 118 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) [2021-06-05 05:00:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 268 transitions. [2021-06-05 05:00:43,690 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 268 transitions. Word has length 18 [2021-06-05 05:00:43,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:43,691 INFO L482 AbstractCegarLoop]: Abstraction has 119 states and 268 transitions. [2021-06-05 05:00:43,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:43,691 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 268 transitions. [2021-06-05 05:00:43,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:43,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:43,691 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:43,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5232,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:43,907 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:43,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:43,907 INFO L82 PathProgramCache]: Analyzing trace with hash -151461340, now seen corresponding path program 286 times [2021-06-05 05:00:43,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:43,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954399704] [2021-06-05 05:00:43,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:43,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:44,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:44,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954399704] [2021-06-05 05:00:44,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954399704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:44,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119543089] [2021-06-05 05:00:44,085 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 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 [2021-06-05 05:00:44,112 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:44,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:44,412 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:44,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119543089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:44,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:44,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:00:44,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380020816] [2021-06-05 05:00:44,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:00:44,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:00:44,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:44,413 INFO L87 Difference]: Start difference. First operand 119 states and 268 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:45,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:45,044 INFO L93 Difference]: Finished difference Result 215 states and 425 transitions. [2021-06-05 05:00:45,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:00:45,044 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:00:45,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:45,045 INFO L225 Difference]: With dead ends: 215 [2021-06-05 05:00:45,045 INFO L226 Difference]: Without dead ends: 208 [2021-06-05 05:00:45,045 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 670.1ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:00:45,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-05 05:00:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-06-05 05:00:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2564102564102564) internal successors, (264), 117 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) [2021-06-05 05:00:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 264 transitions. [2021-06-05 05:00:45,046 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 264 transitions. Word has length 18 [2021-06-05 05:00:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:45,046 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 264 transitions. [2021-06-05 05:00:45,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 264 transitions. [2021-06-05 05:00:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:45,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:45,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:45,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5279 [2021-06-05 05:00:45,247 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:45,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1916691518, now seen corresponding path program 287 times [2021-06-05 05:00:45,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:45,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7717245] [2021-06-05 05:00:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:45,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:45,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:45,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7717245] [2021-06-05 05:00:45,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7717245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:45,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046765414] [2021-06-05 05:00:45,372 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 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 [2021-06-05 05:00:45,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:00:45,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:45,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:45,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:45,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046765414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:45,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:45,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:00:45,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829773752] [2021-06-05 05:00:45,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:00:45,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:45,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:00:45,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:00:45,775 INFO L87 Difference]: Start difference. First operand 118 states and 264 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:46,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:46,273 INFO L93 Difference]: Finished difference Result 226 states and 445 transitions. [2021-06-05 05:00:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:00:46,273 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:00:46,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:46,273 INFO L225 Difference]: With dead ends: 226 [2021-06-05 05:00:46,273 INFO L226 Difference]: Without dead ends: 219 [2021-06-05 05:00:46,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 400.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:00:46,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-06-05 05:00:46,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 121. [2021-06-05 05:00:46,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 2.2916666666666665) internal successors, (275), 120 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) [2021-06-05 05:00:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 275 transitions. [2021-06-05 05:00:46,275 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 275 transitions. Word has length 18 [2021-06-05 05:00:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:46,275 INFO L482 AbstractCegarLoop]: Abstraction has 121 states and 275 transitions. [2021-06-05 05:00:46,275 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:00:46,275 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 275 transitions. [2021-06-05 05:00:46,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:46,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:46,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:46,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5325,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:46,476 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:46,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:46,476 INFO L82 PathProgramCache]: Analyzing trace with hash -686691142, now seen corresponding path program 288 times [2021-06-05 05:00:46,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:46,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390512233] [2021-06-05 05:00:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:46,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:46,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390512233] [2021-06-05 05:00:46,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390512233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:46,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913188673] [2021-06-05 05:00:46,715 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 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 [2021-06-05 05:00:46,748 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:00:46,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:46,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:47,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:47,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913188673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:47,169 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:47,169 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:00:47,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340339438] [2021-06-05 05:00:47,169 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:47,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:47,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:47,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:47,169 INFO L87 Difference]: Start difference. First operand 121 states and 275 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:00:47,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:47,746 INFO L93 Difference]: Finished difference Result 228 states and 447 transitions. [2021-06-05 05:00:47,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:00:47,747 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:00:47,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:47,747 INFO L225 Difference]: With dead ends: 228 [2021-06-05 05:00:47,747 INFO L226 Difference]: Without dead ends: 221 [2021-06-05 05:00:47,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 642.6ms TimeCoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:00:47,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-06-05 05:00:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 120. [2021-06-05 05:00:47,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.277310924369748) internal successors, (271), 119 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) [2021-06-05 05:00:47,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 271 transitions. [2021-06-05 05:00:47,749 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 271 transitions. Word has length 18 [2021-06-05 05:00:47,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:47,749 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 271 transitions. [2021-06-05 05:00:47,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:00:47,749 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 271 transitions. [2021-06-05 05:00:47,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:47,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:47,749 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:47,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5438 [2021-06-05 05:00:47,950 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:47,950 INFO L82 PathProgramCache]: Analyzing trace with hash -513443450, now seen corresponding path program 289 times [2021-06-05 05:00:47,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:47,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702746752] [2021-06-05 05:00:47,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:48,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:48,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:48,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702746752] [2021-06-05 05:00:48,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702746752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:48,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12611833] [2021-06-05 05:00:48,076 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 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 [2021-06-05 05:00:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:48,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:48,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12611833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:48,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:48,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:00:48,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448796218] [2021-06-05 05:00:48,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:48,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:48,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:48,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:48,430 INFO L87 Difference]: Start difference. First operand 120 states and 271 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:00:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:48,861 INFO L93 Difference]: Finished difference Result 211 states and 419 transitions. [2021-06-05 05:00:48,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:00:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:00:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:48,862 INFO L225 Difference]: With dead ends: 211 [2021-06-05 05:00:48,862 INFO L226 Difference]: Without dead ends: 204 [2021-06-05 05:00:48,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:00:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-06-05 05:00:48,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 122. [2021-06-05 05:00:48,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.28099173553719) internal successors, (276), 121 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) [2021-06-05 05:00:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 276 transitions. [2021-06-05 05:00:48,863 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 276 transitions. Word has length 18 [2021-06-05 05:00:48,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:48,863 INFO L482 AbstractCegarLoop]: Abstraction has 122 states and 276 transitions. [2021-06-05 05:00:48,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:00:48,863 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 276 transitions. [2021-06-05 05:00:48,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:48,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:48,864 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:49,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5551 [2021-06-05 05:00:49,064 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:49,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:49,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1351423662, now seen corresponding path program 290 times [2021-06-05 05:00:49,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:49,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447550576] [2021-06-05 05:00:49,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:49,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:49,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447550576] [2021-06-05 05:00:49,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447550576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:49,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228000837] [2021-06-05 05:00:49,419 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 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 [2021-06-05 05:00:49,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:49,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:49,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:49,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:49,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228000837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:49,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:49,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:00:49,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770185526] [2021-06-05 05:00:49,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:49,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:49,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:49,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:49,841 INFO L87 Difference]: Start difference. First operand 122 states and 276 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) [2021-06-05 05:00:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:50,246 INFO L93 Difference]: Finished difference Result 237 states and 477 transitions. [2021-06-05 05:00:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:50,246 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 18 [2021-06-05 05:00:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:50,246 INFO L225 Difference]: With dead ends: 237 [2021-06-05 05:00:50,246 INFO L226 Difference]: Without dead ends: 230 [2021-06-05 05:00:50,246 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 759.8ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:00:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-06-05 05:00:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 141. [2021-06-05 05:00:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.3285714285714287) internal successors, (326), 140 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) [2021-06-05 05:00:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 326 transitions. [2021-06-05 05:00:50,248 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 326 transitions. Word has length 18 [2021-06-05 05:00:50,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:50,248 INFO L482 AbstractCegarLoop]: Abstraction has 141 states and 326 transitions. [2021-06-05 05:00:50,248 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) [2021-06-05 05:00:50,248 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 326 transitions. [2021-06-05 05:00:50,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:50,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:50,248 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:50,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5623,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:50,449 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:50,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:50,449 INFO L82 PathProgramCache]: Analyzing trace with hash -215319658, now seen corresponding path program 291 times [2021-06-05 05:00:50,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:50,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830286114] [2021-06-05 05:00:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:50,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830286114] [2021-06-05 05:00:50,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830286114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:50,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842432487] [2021-06-05 05:00:50,607 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 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 [2021-06-05 05:00:50,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:00:50,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:50,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:50,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:51,032 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:51,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842432487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:51,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:51,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:00:51,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286532782] [2021-06-05 05:00:51,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:00:51,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:51,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:00:51,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:51,033 INFO L87 Difference]: Start difference. First operand 141 states and 326 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:00:51,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:51,701 INFO L93 Difference]: Finished difference Result 278 states and 548 transitions. [2021-06-05 05:00:51,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:00:51,702 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-06-05 05:00:51,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:51,702 INFO L225 Difference]: With dead ends: 278 [2021-06-05 05:00:51,702 INFO L226 Difference]: Without dead ends: 271 [2021-06-05 05:00:51,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 697.5ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:00:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-06-05 05:00:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 144. [2021-06-05 05:00:51,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.3496503496503496) internal successors, (336), 143 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) [2021-06-05 05:00:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 336 transitions. [2021-06-05 05:00:51,704 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 336 transitions. Word has length 18 [2021-06-05 05:00:51,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:51,704 INFO L482 AbstractCegarLoop]: Abstraction has 144 states and 336 transitions. [2021-06-05 05:00:51,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:00:51,704 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 336 transitions. [2021-06-05 05:00:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:51,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:51,704 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:51,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5659,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:51,917 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -455765806, now seen corresponding path program 292 times [2021-06-05 05:00:51,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:51,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493290793] [2021-06-05 05:00:51,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:52,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:52,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493290793] [2021-06-05 05:00:52,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493290793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:52,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201903149] [2021-06-05 05:00:52,157 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 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 [2021-06-05 05:00:52,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:00:52,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:52,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:52,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:52,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201903149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:52,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:52,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:00:52,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840001653] [2021-06-05 05:00:52,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:00:52,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:00:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:52,562 INFO L87 Difference]: Start difference. First operand 144 states and 336 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:00:53,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:53,240 INFO L93 Difference]: Finished difference Result 279 states and 555 transitions. [2021-06-05 05:00:53,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:00:53,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-06-05 05:00:53,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:53,241 INFO L225 Difference]: With dead ends: 279 [2021-06-05 05:00:53,241 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 05:00:53,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 776.9ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:00:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 05:00:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 146. [2021-06-05 05:00:53,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.3655172413793104) internal successors, (343), 145 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) [2021-06-05 05:00:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 343 transitions. [2021-06-05 05:00:53,243 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 343 transitions. Word has length 18 [2021-06-05 05:00:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:53,243 INFO L482 AbstractCegarLoop]: Abstraction has 146 states and 343 transitions. [2021-06-05 05:00:53,243 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:00:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 343 transitions. [2021-06-05 05:00:53,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:53,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:53,244 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:53,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5705 [2021-06-05 05:00:53,444 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:53,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:53,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1156258794, now seen corresponding path program 293 times [2021-06-05 05:00:53,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:53,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246943421] [2021-06-05 05:00:53,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:53,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246943421] [2021-06-05 05:00:53,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246943421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:53,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131922557] [2021-06-05 05:00:53,622 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 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 [2021-06-05 05:00:53,651 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:00:53,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:53,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:53,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:54,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131922557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:54,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:54,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:00:54,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575448257] [2021-06-05 05:00:54,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:54,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:54,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:54,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:54,036 INFO L87 Difference]: Start difference. First operand 146 states and 343 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) [2021-06-05 05:00:54,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:54,910 INFO L93 Difference]: Finished difference Result 268 states and 542 transitions. [2021-06-05 05:00:54,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:00:54,910 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 [2021-06-05 05:00:54,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:54,910 INFO L225 Difference]: With dead ends: 268 [2021-06-05 05:00:54,910 INFO L226 Difference]: Without dead ends: 261 [2021-06-05 05:00:54,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 835.3ms TimeCoverageRelationStatistics Valid=79, Invalid=623, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:00:54,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-06-05 05:00:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 147. [2021-06-05 05:00:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.3767123287671232) internal successors, (347), 146 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) [2021-06-05 05:00:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 347 transitions. [2021-06-05 05:00:54,912 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 347 transitions. Word has length 18 [2021-06-05 05:00:54,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:54,912 INFO L482 AbstractCegarLoop]: Abstraction has 147 states and 347 transitions. [2021-06-05 05:00:54,912 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) [2021-06-05 05:00:54,912 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 347 transitions. [2021-06-05 05:00:54,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:54,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:54,913 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:55,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5739 [2021-06-05 05:00:55,113 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:55,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:55,113 INFO L82 PathProgramCache]: Analyzing trace with hash 535325842, now seen corresponding path program 294 times [2021-06-05 05:00:55,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:55,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121892864] [2021-06-05 05:00:55,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:55,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:55,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121892864] [2021-06-05 05:00:55,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121892864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:55,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529097590] [2021-06-05 05:00:55,376 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 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 [2021-06-05 05:00:55,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:00:55,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:00:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:55,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,763 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 31 treesize of output 23 [2021-06-05 05:00:55,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:55,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,770 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 30 treesize of output 22 [2021-06-05 05:00:55,771 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:55,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,778 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 38 treesize of output 28 [2021-06-05 05:00:55,781 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:55,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,787 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 31 treesize of output 23 [2021-06-05 05:00:55,789 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:55,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,794 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,794 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 37 treesize of output 27 [2021-06-05 05:00:55,795 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:55,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:00:55,800 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 30 treesize of output 22 [2021-06-05 05:00:55,801 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:55,934 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-05 05:00:55,934 INFO L628 ElimStorePlain]: treesize reduction 650, result has 12.5 percent of original size [2021-06-05 05:00:55,935 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:00:55,937 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 [2021-06-05 05:00:55,938 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:55,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:55,971 INFO L518 ElimStorePlain]: Eliminatee v_prenex_221 vanished before elimination [2021-06-05 05:00:55,974 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 7 treesize of output 5 [2021-06-05 05:00:55,975 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:00:56,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:00:56,006 INFO L518 ElimStorePlain]: Eliminatee v_prenex_223 vanished before elimination [2021-06-05 05:00:56,008 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:00:56,008 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 05:00:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:56,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529097590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:56,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:56,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:00:56,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975217702] [2021-06-05 05:00:56,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:00:56,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:56,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:00:56,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:00:56,158 INFO L87 Difference]: Start difference. First operand 147 states and 347 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:00:56,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:56,955 INFO L93 Difference]: Finished difference Result 266 states and 541 transitions. [2021-06-05 05:00:56,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:00:56,955 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 18 [2021-06-05 05:00:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:56,956 INFO L225 Difference]: With dead ends: 266 [2021-06-05 05:00:56,956 INFO L226 Difference]: Without dead ends: 252 [2021-06-05 05:00:56,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 959.8ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:00:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-06-05 05:00:56,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 143. [2021-06-05 05:00:56,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 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) [2021-06-05 05:00:56,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-06-05 05:00:56,958 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 18 [2021-06-05 05:00:56,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:56,958 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-06-05 05:00:56,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:00:56,958 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-06-05 05:00:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:56,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:56,958 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:57,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5773 [2021-06-05 05:00:57,159 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1287512490, now seen corresponding path program 295 times [2021-06-05 05:00:57,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:57,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853513302] [2021-06-05 05:00:57,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:57,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:57,302 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:57,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853513302] [2021-06-05 05:00:57,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853513302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:57,302 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292875955] [2021-06-05 05:00:57,302 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 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 [2021-06-05 05:00:57,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:57,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:57,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292875955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:57,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:57,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:00:57,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367549628] [2021-06-05 05:00:57,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:00:57,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:57,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:00:57,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:00:57,691 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:58,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:58,144 INFO L93 Difference]: Finished difference Result 220 states and 470 transitions. [2021-06-05 05:00:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:00:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:00:58,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:58,144 INFO L225 Difference]: With dead ends: 220 [2021-06-05 05:00:58,144 INFO L226 Difference]: Without dead ends: 213 [2021-06-05 05:00:58,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:00:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-06-05 05:00:58,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 151. [2021-06-05 05:00:58,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-06-05 05:00:58,146 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-06-05 05:00:58,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:58,147 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-06-05 05:00:58,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:58,147 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-06-05 05:00:58,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:58,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:58,147 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:58,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5810,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:00:58,347 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:58,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:58,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1527958638, now seen corresponding path program 296 times [2021-06-05 05:00:58,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:58,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139730351] [2021-06-05 05:00:58,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:58,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:58,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:58,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:58,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139730351] [2021-06-05 05:00:58,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139730351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:58,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090712242] [2021-06-05 05:00:58,479 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 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 [2021-06-05 05:00:58,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:00:58,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:58,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:58,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:00:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090712242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:58,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:00:58,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:00:58,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420439322] [2021-06-05 05:00:58,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:00:58,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:00:58,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:00:58,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:00:58,869 INFO L87 Difference]: Start difference. First operand 151 states and 359 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) [2021-06-05 05:00:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:00:59,488 INFO L93 Difference]: Finished difference Result 242 states and 510 transitions. [2021-06-05 05:00:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:00:59,489 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 18 [2021-06-05 05:00:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:00:59,489 INFO L225 Difference]: With dead ends: 242 [2021-06-05 05:00:59,489 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 05:00:59,489 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 666.0ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:00:59,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 05:00:59,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 153. [2021-06-05 05:00:59,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 2.4078947368421053) internal successors, (366), 152 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:00:59,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 366 transitions. [2021-06-05 05:00:59,491 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 366 transitions. Word has length 18 [2021-06-05 05:00:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:00:59,491 INFO L482 AbstractCegarLoop]: Abstraction has 153 states and 366 transitions. [2021-06-05 05:00:59,491 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) [2021-06-05 05:00:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 366 transitions. [2021-06-05 05:00:59,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:00:59,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:00:59,492 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:00:59,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5856 [2021-06-05 05:00:59,692 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:00:59,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:00:59,692 INFO L82 PathProgramCache]: Analyzing trace with hash 2066515670, now seen corresponding path program 297 times [2021-06-05 05:00:59,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:00:59,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365486430] [2021-06-05 05:00:59,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:00:59,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:00:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:00:59,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:00:59,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365486430] [2021-06-05 05:00:59,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365486430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:00:59,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152678622] [2021-06-05 05:00:59,818 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 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 [2021-06-05 05:00:59,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:00:59,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:00:59,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:00:59,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:00,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:00,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152678622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:00,129 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:00,129 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:01:00,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213812822] [2021-06-05 05:01:00,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:01:00,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:00,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:01:00,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:01:00,130 INFO L87 Difference]: Start difference. First operand 153 states and 366 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:00,612 INFO L93 Difference]: Finished difference Result 244 states and 515 transitions. [2021-06-05 05:01:00,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:01:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:01:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:00,613 INFO L225 Difference]: With dead ends: 244 [2021-06-05 05:01:00,613 INFO L226 Difference]: Without dead ends: 237 [2021-06-05 05:01:00,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 530.1ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:01:00,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-06-05 05:01:00,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 154. [2021-06-05 05:01:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.418300653594771) internal successors, (370), 153 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) [2021-06-05 05:01:00,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 370 transitions. [2021-06-05 05:01:00,615 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 370 transitions. Word has length 18 [2021-06-05 05:01:00,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:00,615 INFO L482 AbstractCegarLoop]: Abstraction has 154 states and 370 transitions. [2021-06-05 05:01:00,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:00,615 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 370 transitions. [2021-06-05 05:01:00,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:00,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:00,615 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:00,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5902,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:00,816 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:00,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:00,816 INFO L82 PathProgramCache]: Analyzing trace with hash -536866990, now seen corresponding path program 298 times [2021-06-05 05:01:00,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:00,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654655008] [2021-06-05 05:01:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:00,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:00,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654655008] [2021-06-05 05:01:00,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654655008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:00,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371630615] [2021-06-05 05:01:00,947 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 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 [2021-06-05 05:01:00,973 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:00,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:00,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:01,277 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:01,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371630615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:01,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:01,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:01:01,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463036810] [2021-06-05 05:01:01,277 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:01:01,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:01,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:01:01,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:01:01,278 INFO L87 Difference]: Start difference. First operand 154 states and 370 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:01,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:01,800 INFO L93 Difference]: Finished difference Result 229 states and 492 transitions. [2021-06-05 05:01:01,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:01:01,800 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:01:01,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:01,800 INFO L225 Difference]: With dead ends: 229 [2021-06-05 05:01:01,800 INFO L226 Difference]: Without dead ends: 222 [2021-06-05 05:01:01,800 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 542.2ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:01:01,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-05 05:01:01,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 151. [2021-06-05 05:01:01,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 2.3933333333333335) internal successors, (359), 150 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:01,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 359 transitions. [2021-06-05 05:01:01,802 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 359 transitions. Word has length 18 [2021-06-05 05:01:01,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:01,802 INFO L482 AbstractCegarLoop]: Abstraction has 151 states and 359 transitions. [2021-06-05 05:01:01,802 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:01,802 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 359 transitions. [2021-06-05 05:01:01,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:01,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:01,803 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:02,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5936 [2021-06-05 05:01:02,003 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 100022482, now seen corresponding path program 299 times [2021-06-05 05:01:02,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:02,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359390297] [2021-06-05 05:01:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:02,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:02,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:02,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359390297] [2021-06-05 05:01:02,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359390297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:02,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129453497] [2021-06-05 05:01:02,152 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 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 [2021-06-05 05:01:02,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:01:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:02,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:02,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129453497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:02,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:02,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:01:02,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920477717] [2021-06-05 05:01:02,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:02,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:02,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:02,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:02,503 INFO L87 Difference]: Start difference. First operand 151 states and 359 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:03,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:03,008 INFO L93 Difference]: Finished difference Result 246 states and 538 transitions. [2021-06-05 05:01:03,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:03,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:01:03,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:03,009 INFO L225 Difference]: With dead ends: 246 [2021-06-05 05:01:03,009 INFO L226 Difference]: Without dead ends: 239 [2021-06-05 05:01:03,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 580.6ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:03,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-06-05 05:01:03,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 164. [2021-06-05 05:01:03,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 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) [2021-06-05 05:01:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 05:01:03,017 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 05:01:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:03,017 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 05:01:03,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:03,018 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 05:01:03,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:03,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:03,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:03,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5970 [2021-06-05 05:01:03,218 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash -600470506, now seen corresponding path program 300 times [2021-06-05 05:01:03,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:03,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593218647] [2021-06-05 05:01:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:03,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593218647] [2021-06-05 05:01:03,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593218647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:03,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558176635] [2021-06-05 05:01:03,351 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 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 [2021-06-05 05:01:03,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:01:03,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:03,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:03,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558176635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:03,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:03,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:01:03,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172006364] [2021-06-05 05:01:03,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:01:03,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:03,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:01:03,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:01:03,659 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:04,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:04,137 INFO L93 Difference]: Finished difference Result 258 states and 554 transitions. [2021-06-05 05:01:04,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:04,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:01:04,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:04,137 INFO L225 Difference]: With dead ends: 258 [2021-06-05 05:01:04,137 INFO L226 Difference]: Without dead ends: 251 [2021-06-05 05:01:04,138 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 480.6ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:01:04,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-06-05 05:01:04,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2021-06-05 05:01:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.451219512195122) internal successors, (402), 164 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:04,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 402 transitions. [2021-06-05 05:01:04,139 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 402 transitions. Word has length 18 [2021-06-05 05:01:04,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:04,140 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 402 transitions. [2021-06-05 05:01:04,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 402 transitions. [2021-06-05 05:01:04,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:04,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:04,140 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:04,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6016,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:04,340 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:04,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1091114130, now seen corresponding path program 301 times [2021-06-05 05:01:04,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:04,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709253198] [2021-06-05 05:01:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:04,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:04,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709253198] [2021-06-05 05:01:04,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709253198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:04,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839799245] [2021-06-05 05:01:04,480 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 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 [2021-06-05 05:01:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:04,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:04,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:04,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839799245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:04,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:04,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:01:04,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845304808] [2021-06-05 05:01:04,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:04,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:04,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:04,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:04,793 INFO L87 Difference]: Start difference. First operand 165 states and 402 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:01:05,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:05,403 INFO L93 Difference]: Finished difference Result 243 states and 531 transitions. [2021-06-05 05:01:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:01:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:05,404 INFO L225 Difference]: With dead ends: 243 [2021-06-05 05:01:05,404 INFO L226 Difference]: Without dead ends: 236 [2021-06-05 05:01:05,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 608.1ms TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:01:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-06-05 05:01:05,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 164. [2021-06-05 05:01:05,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 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) [2021-06-05 05:01:05,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 05:01:05,406 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 05:01:05,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:05,406 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 05:01:05,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:01:05,406 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 05:01:05,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:05,406 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:05,406 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:05,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6062 [2021-06-05 05:01:05,607 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:05,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:05,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1135700308, now seen corresponding path program 302 times [2021-06-05 05:01:05,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:05,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176294167] [2021-06-05 05:01:05,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:05,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:05,723 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:05,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176294167] [2021-06-05 05:01:05,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176294167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:05,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401469699] [2021-06-05 05:01:05,723 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 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 [2021-06-05 05:01:05,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:05,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:06,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:06,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401469699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:06,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:06,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:01:06,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520469939] [2021-06-05 05:01:06,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:01:06,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:06,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:01:06,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:01:06,289 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:06,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:06,764 INFO L93 Difference]: Finished difference Result 239 states and 522 transitions. [2021-06-05 05:01:06,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:01:06,764 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:01:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:06,765 INFO L225 Difference]: With dead ends: 239 [2021-06-05 05:01:06,765 INFO L226 Difference]: Without dead ends: 232 [2021-06-05 05:01:06,765 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:01:06,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-06-05 05:01:06,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 164. [2021-06-05 05:01:06,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.441717791411043) internal successors, (398), 163 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) [2021-06-05 05:01:06,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 398 transitions. [2021-06-05 05:01:06,767 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 398 transitions. Word has length 18 [2021-06-05 05:01:06,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:06,767 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 398 transitions. [2021-06-05 05:01:06,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:01:06,767 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 398 transitions. [2021-06-05 05:01:06,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:06,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:06,767 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:06,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6096 [2021-06-05 05:01:06,984 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash 555884328, now seen corresponding path program 303 times [2021-06-05 05:01:06,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:06,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342865652] [2021-06-05 05:01:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:07,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342865652] [2021-06-05 05:01:07,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342865652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:07,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318048051] [2021-06-05 05:01:07,126 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 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 [2021-06-05 05:01:07,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:01:07,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:07,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:07,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:07,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318048051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:07,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:07,683 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:01:07,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661469021] [2021-06-05 05:01:07,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:07,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:07,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:07,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:07,684 INFO L87 Difference]: Start difference. First operand 164 states and 398 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:01:08,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:08,170 INFO L93 Difference]: Finished difference Result 240 states and 522 transitions. [2021-06-05 05:01:08,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:01:08,170 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:01:08,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:08,171 INFO L225 Difference]: With dead ends: 240 [2021-06-05 05:01:08,171 INFO L226 Difference]: Without dead ends: 233 [2021-06-05 05:01:08,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 509.8ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:08,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2021-06-05 05:01:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2021-06-05 05:01:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 2.432098765432099) internal successors, (394), 162 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) [2021-06-05 05:01:08,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 394 transitions. [2021-06-05 05:01:08,173 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 394 transitions. Word has length 18 [2021-06-05 05:01:08,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:08,173 INFO L482 AbstractCegarLoop]: Abstraction has 163 states and 394 transitions. [2021-06-05 05:01:08,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:01:08,173 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 394 transitions. [2021-06-05 05:01:08,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:08,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:08,173 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:08,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6282 [2021-06-05 05:01:08,389 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:08,389 INFO L82 PathProgramCache]: Analyzing trace with hash 729132020, now seen corresponding path program 304 times [2021-06-05 05:01:08,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:08,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31622295] [2021-06-05 05:01:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:08,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:08,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:08,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31622295] [2021-06-05 05:01:08,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31622295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:08,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008693803] [2021-06-05 05:01:08,610 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 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 [2021-06-05 05:01:08,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:08,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:08,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:09,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:09,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008693803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:09,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:09,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:09,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276484234] [2021-06-05 05:01:09,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:09,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:09,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:09,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:09,028 INFO L87 Difference]: Start difference. First operand 163 states and 394 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) [2021-06-05 05:01:09,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:09,372 INFO L93 Difference]: Finished difference Result 180 states and 422 transitions. [2021-06-05 05:01:09,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:01:09,372 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 [2021-06-05 05:01:09,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:09,373 INFO L225 Difference]: With dead ends: 180 [2021-06-05 05:01:09,373 INFO L226 Difference]: Without dead ends: 173 [2021-06-05 05:01:09,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:01:09,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-06-05 05:01:09,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2021-06-05 05:01:09,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.4242424242424243) internal successors, (400), 165 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 400 transitions. [2021-06-05 05:01:09,375 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 400 transitions. Word has length 18 [2021-06-05 05:01:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:09,375 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 400 transitions. [2021-06-05 05:01:09,375 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) [2021-06-05 05:01:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 400 transitions. [2021-06-05 05:01:09,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:09,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:09,375 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:09,575 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6453 [2021-06-05 05:01:09,575 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:09,576 INFO L82 PathProgramCache]: Analyzing trace with hash -547954986, now seen corresponding path program 305 times [2021-06-05 05:01:09,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:09,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466127577] [2021-06-05 05:01:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:09,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:09,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:09,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466127577] [2021-06-05 05:01:09,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466127577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:09,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455275609] [2021-06-05 05:01:09,791 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 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 [2021-06-05 05:01:09,819 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:01:09,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:09,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:09,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455275609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:10,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:10,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:01:10,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114001486] [2021-06-05 05:01:10,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:10,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:10,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:10,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:10,344 INFO L87 Difference]: Start difference. First operand 166 states and 400 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:01:10,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:10,916 INFO L93 Difference]: Finished difference Result 292 states and 615 transitions. [2021-06-05 05:01:10,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:01:10,917 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:01:10,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:10,917 INFO L225 Difference]: With dead ends: 292 [2021-06-05 05:01:10,917 INFO L226 Difference]: Without dead ends: 285 [2021-06-05 05:01:10,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 642.2ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:01:10,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-06-05 05:01:10,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 172. [2021-06-05 05:01:10,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.461988304093567) internal successors, (421), 171 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) [2021-06-05 05:01:10,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 421 transitions. [2021-06-05 05:01:10,919 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 421 transitions. Word has length 18 [2021-06-05 05:01:10,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:10,919 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 421 transitions. [2021-06-05 05:01:10,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:01:10,919 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 421 transitions. [2021-06-05 05:01:10,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:10,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:10,919 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:11,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6525,309 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:11,120 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:11,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1143629650, now seen corresponding path program 306 times [2021-06-05 05:01:11,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:11,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042372107] [2021-06-05 05:01:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:11,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:11,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042372107] [2021-06-05 05:01:11,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042372107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:11,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [338723941] [2021-06-05 05:01:11,329 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 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 [2021-06-05 05:01:11,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:01:11,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:11,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:11,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:11,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:11,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [338723941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:11,981 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:11,981 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:01:11,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146988276] [2021-06-05 05:01:11,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:11,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:11,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:11,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:11,982 INFO L87 Difference]: Start difference. First operand 172 states and 421 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:01:12,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:12,564 INFO L93 Difference]: Finished difference Result 296 states and 620 transitions. [2021-06-05 05:01:12,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:01:12,565 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:01:12,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:12,565 INFO L225 Difference]: With dead ends: 296 [2021-06-05 05:01:12,565 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 05:01:12,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 627.0ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:01:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 05:01:12,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 171. [2021-06-05 05:01:12,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.4529411764705884) internal successors, (417), 170 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) [2021-06-05 05:01:12,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 417 transitions. [2021-06-05 05:01:12,567 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 417 transitions. Word has length 18 [2021-06-05 05:01:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:12,567 INFO L482 AbstractCegarLoop]: Abstraction has 171 states and 417 transitions. [2021-06-05 05:01:12,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:01:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 417 transitions. [2021-06-05 05:01:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:12,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:12,567 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:12,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6691 [2021-06-05 05:01:12,768 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1316877342, now seen corresponding path program 307 times [2021-06-05 05:01:12,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:12,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952548832] [2021-06-05 05:01:12,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:12,930 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:12,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:12,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952548832] [2021-06-05 05:01:12,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952548832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:12,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113286581] [2021-06-05 05:01:12,931 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 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 [2021-06-05 05:01:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:12,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:12,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:13,314 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:13,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113286581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:13,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:13,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:01:13,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886973246] [2021-06-05 05:01:13,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:13,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:13,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:13,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:13,315 INFO L87 Difference]: Start difference. First operand 171 states and 417 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:14,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:14,100 INFO L93 Difference]: Finished difference Result 284 states and 596 transitions. [2021-06-05 05:01:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:01:14,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:01:14,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:14,101 INFO L225 Difference]: With dead ends: 284 [2021-06-05 05:01:14,101 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 05:01:14,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 853.4ms TimeCoverageRelationStatistics Valid=114, Invalid=878, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:01:14,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 05:01:14,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 164. [2021-06-05 05:01:14,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.4355828220858897) internal successors, (397), 163 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) [2021-06-05 05:01:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 397 transitions. [2021-06-05 05:01:14,103 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 397 transitions. Word has length 18 [2021-06-05 05:01:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:14,103 INFO L482 AbstractCegarLoop]: Abstraction has 164 states and 397 transitions. [2021-06-05 05:01:14,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 397 transitions. [2021-06-05 05:01:14,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:14,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:14,103 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:14,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6916,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:14,304 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:14,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:14,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1902378798, now seen corresponding path program 308 times [2021-06-05 05:01:14,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:14,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689077622] [2021-06-05 05:01:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:14,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689077622] [2021-06-05 05:01:14,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689077622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:14,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467590257] [2021-06-05 05:01:14,436 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 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 [2021-06-05 05:01:14,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:14,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:14,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:14,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:14,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467590257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:14,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:14,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:01:14,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62820009] [2021-06-05 05:01:14,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:14,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:14,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:14,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:14,834 INFO L87 Difference]: Start difference. First operand 164 states and 397 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:15,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:15,231 INFO L93 Difference]: Finished difference Result 245 states and 524 transitions. [2021-06-05 05:01:15,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:01:15,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:01:15,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:15,232 INFO L225 Difference]: With dead ends: 245 [2021-06-05 05:01:15,232 INFO L226 Difference]: Without dead ends: 238 [2021-06-05 05:01:15,232 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 478.1ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:01:15,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-06-05 05:01:15,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 168. [2021-06-05 05:01:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.4251497005988023) internal successors, (405), 167 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:15,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 405 transitions. [2021-06-05 05:01:15,234 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 405 transitions. Word has length 18 [2021-06-05 05:01:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:15,234 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 405 transitions. [2021-06-05 05:01:15,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 405 transitions. [2021-06-05 05:01:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:15,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:15,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:15,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6988 [2021-06-05 05:01:15,435 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:15,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:15,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1686916964, now seen corresponding path program 309 times [2021-06-05 05:01:15,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:15,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703847229] [2021-06-05 05:01:15,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:15,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:15,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703847229] [2021-06-05 05:01:15,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703847229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:15,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990597471] [2021-06-05 05:01:15,602 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 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 [2021-06-05 05:01:15,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:01:15,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:15,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:16,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:16,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990597471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:16,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:16,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:16,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199215534] [2021-06-05 05:01:16,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:16,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:16,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:16,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:16,050 INFO L87 Difference]: Start difference. First operand 168 states and 405 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) [2021-06-05 05:01:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:16,474 INFO L93 Difference]: Finished difference Result 328 states and 704 transitions. [2021-06-05 05:01:16,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:16,475 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 18 [2021-06-05 05:01:16,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:16,475 INFO L225 Difference]: With dead ends: 328 [2021-06-05 05:01:16,475 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:01:16,475 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 561.5ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:01:16,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:01:16,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 189. [2021-06-05 05:01:16,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.515957446808511) internal successors, (473), 188 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:16,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 473 transitions. [2021-06-05 05:01:16,478 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 473 transitions. Word has length 18 [2021-06-05 05:01:16,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:16,478 INFO L482 AbstractCegarLoop]: Abstraction has 189 states and 473 transitions. [2021-06-05 05:01:16,478 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) [2021-06-05 05:01:16,478 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 473 transitions. [2021-06-05 05:01:16,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:16,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:16,478 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:16,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7064 [2021-06-05 05:01:16,678 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:16,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:16,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1471946328, now seen corresponding path program 310 times [2021-06-05 05:01:16,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:16,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066397001] [2021-06-05 05:01:16,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:16,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:16,918 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:16,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066397001] [2021-06-05 05:01:16,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066397001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:16,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885176049] [2021-06-05 05:01:16,919 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 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 [2021-06-05 05:01:16,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:16,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:16,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:16,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:17,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885176049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:17,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:17,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:01:17,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269065937] [2021-06-05 05:01:17,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:17,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:17,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:17,379 INFO L87 Difference]: Start difference. First operand 189 states and 473 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) [2021-06-05 05:01:17,887 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 63 [2021-06-05 05:01:18,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:18,372 INFO L93 Difference]: Finished difference Result 385 states and 804 transitions. [2021-06-05 05:01:18,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:01:18,373 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 18 [2021-06-05 05:01:18,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:18,373 INFO L225 Difference]: With dead ends: 385 [2021-06-05 05:01:18,373 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 05:01:18,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1086.0ms TimeCoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:01:18,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 05:01:18,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 192. [2021-06-05 05:01:18,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.5287958115183247) internal successors, (483), 191 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 483 transitions. [2021-06-05 05:01:18,376 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 483 transitions. Word has length 18 [2021-06-05 05:01:18,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:18,376 INFO L482 AbstractCegarLoop]: Abstraction has 192 states and 483 transitions. [2021-06-05 05:01:18,376 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) [2021-06-05 05:01:18,376 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 483 transitions. [2021-06-05 05:01:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:18,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:18,376 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:18,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7098 [2021-06-05 05:01:18,576 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:18,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:18,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1712392476, now seen corresponding path program 311 times [2021-06-05 05:01:18,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:18,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409381353] [2021-06-05 05:01:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:18,863 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:18,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:18,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409381353] [2021-06-05 05:01:18,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409381353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:18,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164150711] [2021-06-05 05:01:18,864 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 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 [2021-06-05 05:01:18,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:01:18,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:18,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:19,320 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:19,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164150711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:19,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:19,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:19,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641843283] [2021-06-05 05:01:19,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:19,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:19,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:19,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:19,321 INFO L87 Difference]: Start difference. First operand 192 states and 483 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) [2021-06-05 05:01:20,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:20,442 INFO L93 Difference]: Finished difference Result 371 states and 780 transitions. [2021-06-05 05:01:20,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:01:20,442 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 18 [2021-06-05 05:01:20,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:20,443 INFO L225 Difference]: With dead ends: 371 [2021-06-05 05:01:20,443 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 05:01:20,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1220.0ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:01:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 05:01:20,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 194. [2021-06-05 05:01:20,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.538860103626943) internal successors, (490), 193 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) [2021-06-05 05:01:20,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 490 transitions. [2021-06-05 05:01:20,445 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 490 transitions. Word has length 18 [2021-06-05 05:01:20,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:20,445 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 490 transitions. [2021-06-05 05:01:20,446 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) [2021-06-05 05:01:20,446 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 490 transitions. [2021-06-05 05:01:20,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:20,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:20,446 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:20,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7132,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:20,646 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1882081832, now seen corresponding path program 312 times [2021-06-05 05:01:20,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:20,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176490230] [2021-06-05 05:01:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:20,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:20,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:20,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176490230] [2021-06-05 05:01:20,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176490230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:20,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394241691] [2021-06-05 05:01:20,953 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 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 [2021-06-05 05:01:20,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:01:20,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:20,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:20,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:21,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:21,467 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394241691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:21,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:21,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:01:21,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779806834] [2021-06-05 05:01:21,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:21,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:21,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:21,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:21,467 INFO L87 Difference]: Start difference. First operand 194 states and 490 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) [2021-06-05 05:01:22,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:22,400 INFO L93 Difference]: Finished difference Result 328 states and 729 transitions. [2021-06-05 05:01:22,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:01:22,401 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 [2021-06-05 05:01:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:22,401 INFO L225 Difference]: With dead ends: 328 [2021-06-05 05:01:22,401 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:01:22,402 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1048.6ms TimeCoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:01:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:01:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 205. [2021-06-05 05:01:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.5980392156862746) internal successors, (530), 204 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 530 transitions. [2021-06-05 05:01:22,404 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 530 transitions. Word has length 18 [2021-06-05 05:01:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:22,404 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 530 transitions. [2021-06-05 05:01:22,404 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) [2021-06-05 05:01:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 530 transitions. [2021-06-05 05:01:22,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:22,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:22,404 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:22,605 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7166,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:22,605 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash -721300828, now seen corresponding path program 313 times [2021-06-05 05:01:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:22,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076106779] [2021-06-05 05:01:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:22,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:22,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076106779] [2021-06-05 05:01:22,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076106779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:22,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351053718] [2021-06-05 05:01:22,770 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 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 [2021-06-05 05:01:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:23,139 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:23,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351053718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:23,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:23,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:01:23,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653929867] [2021-06-05 05:01:23,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:23,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:23,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:23,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:23,140 INFO L87 Difference]: Start difference. First operand 205 states and 530 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:23,824 INFO L93 Difference]: Finished difference Result 355 states and 772 transitions. [2021-06-05 05:01:23,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:01:23,824 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:01:23,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:23,825 INFO L225 Difference]: With dead ends: 355 [2021-06-05 05:01:23,825 INFO L226 Difference]: Without dead ends: 341 [2021-06-05 05:01:23,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 665.2ms TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-06-05 05:01:23,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 195. [2021-06-05 05:01:23,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.556701030927835) internal successors, (496), 194 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) [2021-06-05 05:01:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 496 transitions. [2021-06-05 05:01:23,827 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 496 transitions. Word has length 18 [2021-06-05 05:01:23,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:23,827 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 496 transitions. [2021-06-05 05:01:23,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 496 transitions. [2021-06-05 05:01:23,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:23,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:23,828 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:24,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7218,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:24,028 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:24,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:24,029 INFO L82 PathProgramCache]: Analyzing trace with hash 690050046, now seen corresponding path program 314 times [2021-06-05 05:01:24,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:24,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227991696] [2021-06-05 05:01:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:24,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227991696] [2021-06-05 05:01:24,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227991696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:24,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736550477] [2021-06-05 05:01:24,163 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 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 [2021-06-05 05:01:24,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:24,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:24,619 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:24,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736550477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:24,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:24,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:01:24,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462506543] [2021-06-05 05:01:24,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:24,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:24,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:24,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:24,620 INFO L87 Difference]: Start difference. First operand 195 states and 496 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) [2021-06-05 05:01:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:25,141 INFO L93 Difference]: Finished difference Result 308 states and 701 transitions. [2021-06-05 05:01:25,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:01:25,141 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 [2021-06-05 05:01:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:25,141 INFO L225 Difference]: With dead ends: 308 [2021-06-05 05:01:25,141 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 05:01:25,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 532.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:01:25,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 05:01:25,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 205. [2021-06-05 05:01:25,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.588235294117647) internal successors, (528), 204 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) [2021-06-05 05:01:25,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 528 transitions. [2021-06-05 05:01:25,144 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 528 transitions. Word has length 18 [2021-06-05 05:01:25,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:25,144 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 528 transitions. [2021-06-05 05:01:25,144 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) [2021-06-05 05:01:25,144 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 528 transitions. [2021-06-05 05:01:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:25,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:25,144 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:25,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7253,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:25,349 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:25,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:25,349 INFO L82 PathProgramCache]: Analyzing trace with hash 449603898, now seen corresponding path program 315 times [2021-06-05 05:01:25,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:25,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551930596] [2021-06-05 05:01:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:25,490 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:25,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:25,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551930596] [2021-06-05 05:01:25,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551930596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:25,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490563199] [2021-06-05 05:01:25,490 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 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 [2021-06-05 05:01:25,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:01:25,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:25,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:25,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490563199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:25,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:25,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:01:25,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166212474] [2021-06-05 05:01:25,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:25,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:25,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:25,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:25,873 INFO L87 Difference]: Start difference. First operand 205 states and 528 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) [2021-06-05 05:01:26,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:26,596 INFO L93 Difference]: Finished difference Result 329 states and 740 transitions. [2021-06-05 05:01:26,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:01:26,596 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 [2021-06-05 05:01:26,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:26,597 INFO L225 Difference]: With dead ends: 329 [2021-06-05 05:01:26,597 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 05:01:26,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 685.0ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:01:26,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 05:01:26,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 207. [2021-06-05 05:01:26,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.5970873786407767) internal successors, (535), 206 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) [2021-06-05 05:01:26,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 535 transitions. [2021-06-05 05:01:26,599 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 535 transitions. Word has length 18 [2021-06-05 05:01:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:26,600 INFO L482 AbstractCegarLoop]: Abstraction has 207 states and 535 transitions. [2021-06-05 05:01:26,600 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) [2021-06-05 05:01:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 535 transitions. [2021-06-05 05:01:26,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:26,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:26,600 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:26,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7300 [2021-06-05 05:01:26,813 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:26,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:26,813 INFO L82 PathProgramCache]: Analyzing trace with hash -250889090, now seen corresponding path program 316 times [2021-06-05 05:01:26,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:26,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300463205] [2021-06-05 05:01:26,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:27,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:27,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300463205] [2021-06-05 05:01:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300463205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:27,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692502867] [2021-06-05 05:01:27,149 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 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 [2021-06-05 05:01:27,175 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:27,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:27,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:27,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:27,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692502867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:27,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:27,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:01:27,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752300458] [2021-06-05 05:01:27,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:27,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:27,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:27,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:27,551 INFO L87 Difference]: Start difference. First operand 207 states and 535 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) [2021-06-05 05:01:28,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:28,625 INFO L93 Difference]: Finished difference Result 358 states and 789 transitions. [2021-06-05 05:01:28,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:01:28,626 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 18 [2021-06-05 05:01:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:28,626 INFO L225 Difference]: With dead ends: 358 [2021-06-05 05:01:28,626 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 05:01:28,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1163.6ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:01:28,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 05:01:28,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 208. [2021-06-05 05:01:28,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.603864734299517) internal successors, (539), 207 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) [2021-06-05 05:01:28,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 539 transitions. [2021-06-05 05:01:28,629 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 539 transitions. Word has length 18 [2021-06-05 05:01:28,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:28,629 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 539 transitions. [2021-06-05 05:01:28,629 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) [2021-06-05 05:01:28,629 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 539 transitions. [2021-06-05 05:01:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:28,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:28,629 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:28,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7334 [2021-06-05 05:01:28,830 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1440695546, now seen corresponding path program 317 times [2021-06-05 05:01:28,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:28,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830396335] [2021-06-05 05:01:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:28,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830396335] [2021-06-05 05:01:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830396335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646503054] [2021-06-05 05:01:28,964 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 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 [2021-06-05 05:01:28,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:01:28,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:28,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:28,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:29,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:29,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646503054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:29,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:29,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:01:29,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760202948] [2021-06-05 05:01:29,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:29,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:29,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:29,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:29,348 INFO L87 Difference]: Start difference. First operand 208 states and 539 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) [2021-06-05 05:01:30,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:30,113 INFO L93 Difference]: Finished difference Result 315 states and 721 transitions. [2021-06-05 05:01:30,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:30,113 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 18 [2021-06-05 05:01:30,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:30,113 INFO L225 Difference]: With dead ends: 315 [2021-06-05 05:01:30,113 INFO L226 Difference]: Without dead ends: 308 [2021-06-05 05:01:30,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 718.9ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-06-05 05:01:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 202. [2021-06-05 05:01:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.5771144278606966) internal successors, (518), 201 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 518 transitions. [2021-06-05 05:01:30,116 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 518 transitions. Word has length 18 [2021-06-05 05:01:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:30,116 INFO L482 AbstractCegarLoop]: Abstraction has 202 states and 518 transitions. [2021-06-05 05:01:30,116 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) [2021-06-05 05:01:30,116 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 518 transitions. [2021-06-05 05:01:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:30,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:30,116 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:30,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7372,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:30,317 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:30,317 INFO L82 PathProgramCache]: Analyzing trace with hash -34843612, now seen corresponding path program 318 times [2021-06-05 05:01:30,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:30,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14553158] [2021-06-05 05:01:30,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:30,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:30,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14553158] [2021-06-05 05:01:30,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14553158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:30,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973742839] [2021-06-05 05:01:30,418 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 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 [2021-06-05 05:01:30,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:01:30,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:30,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:30,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:30,771 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:30,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973742839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:30,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:30,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:01:30,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192947950] [2021-06-05 05:01:30,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:30,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:30,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:30,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:30,772 INFO L87 Difference]: Start difference. First operand 202 states and 518 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) [2021-06-05 05:01:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:31,165 INFO L93 Difference]: Finished difference Result 327 states and 765 transitions. [2021-06-05 05:01:31,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:01:31,166 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 18 [2021-06-05 05:01:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:31,166 INFO L225 Difference]: With dead ends: 327 [2021-06-05 05:01:31,166 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 05:01:31,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 05:01:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 224. [2021-06-05 05:01:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 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) [2021-06-05 05:01:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-06-05 05:01:31,169 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-06-05 05:01:31,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:31,169 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-06-05 05:01:31,169 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) [2021-06-05 05:01:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-06-05 05:01:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:31,169 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:31,169 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:31,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7406 [2021-06-05 05:01:31,370 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:31,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:31,370 INFO L82 PathProgramCache]: Analyzing trace with hash -735336600, now seen corresponding path program 319 times [2021-06-05 05:01:31,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:31,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106672839] [2021-06-05 05:01:31,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:31,489 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:31,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:31,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106672839] [2021-06-05 05:01:31,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106672839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:31,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066815476] [2021-06-05 05:01:31,490 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 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 [2021-06-05 05:01:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:31,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:31,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:31,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066815476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:31,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:31,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:01:31,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287318451] [2021-06-05 05:01:31,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:01:31,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:31,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:01:31,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:01:31,796 INFO L87 Difference]: Start difference. First operand 224 states and 588 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) [2021-06-05 05:01:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:32,073 INFO L93 Difference]: Finished difference Result 343 states and 790 transitions. [2021-06-05 05:01:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:01:32,074 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 18 [2021-06-05 05:01:32,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:32,074 INFO L225 Difference]: With dead ends: 343 [2021-06-05 05:01:32,074 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 05:01:32,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:32,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 05:01:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 225. [2021-06-05 05:01:32,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 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) [2021-06-05 05:01:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-06-05 05:01:32,077 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-06-05 05:01:32,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:32,077 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-06-05 05:01:32,077 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) [2021-06-05 05:01:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-06-05 05:01:32,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:32,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:32,077 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:32,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7441,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:32,278 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:32,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:32,278 INFO L82 PathProgramCache]: Analyzing trace with hash 956248036, now seen corresponding path program 320 times [2021-06-05 05:01:32,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:32,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071892260] [2021-06-05 05:01:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:32,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071892260] [2021-06-05 05:01:32,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071892260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:32,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322612692] [2021-06-05 05:01:32,380 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 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 [2021-06-05 05:01:32,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:32,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:32,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:32,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:32,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322612692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:32,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:32,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:01:32,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393670102] [2021-06-05 05:01:32,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:01:32,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:32,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:01:32,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:01:32,668 INFO L87 Difference]: Start difference. First operand 225 states and 592 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) [2021-06-05 05:01:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:32,947 INFO L93 Difference]: Finished difference Result 328 states and 767 transitions. [2021-06-05 05:01:32,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:01:32,947 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 18 [2021-06-05 05:01:32,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:32,948 INFO L225 Difference]: With dead ends: 328 [2021-06-05 05:01:32,948 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:01:32,948 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 319.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:32,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:01:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-06-05 05:01:32,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:32,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 05:01:32,950 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 05:01:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:32,950 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 05:01:32,950 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) [2021-06-05 05:01:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 05:01:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:32,951 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:32,951 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:33,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7488 [2021-06-05 05:01:33,151 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:33,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:33,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1270566402, now seen corresponding path program 321 times [2021-06-05 05:01:33,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:33,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042727079] [2021-06-05 05:01:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:33,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:33,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042727079] [2021-06-05 05:01:33,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042727079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:33,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472247337] [2021-06-05 05:01:33,282 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 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 [2021-06-05 05:01:33,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:01:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:33,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:33,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472247337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:33,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:33,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:01:33,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741054521] [2021-06-05 05:01:33,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:01:33,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:33,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:01:33,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:01:33,718 INFO L87 Difference]: Start difference. First operand 222 states and 581 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) [2021-06-05 05:01:34,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:34,170 INFO L93 Difference]: Finished difference Result 336 states and 773 transitions. [2021-06-05 05:01:34,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:01:34,170 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 18 [2021-06-05 05:01:34,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:34,171 INFO L225 Difference]: With dead ends: 336 [2021-06-05 05:01:34,171 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 05:01:34,171 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 466.5ms TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:01:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 05:01:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 225. [2021-06-05 05:01:34,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.642857142857143) internal successors, (592), 224 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) [2021-06-05 05:01:34,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 592 transitions. [2021-06-05 05:01:34,173 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 592 transitions. Word has length 18 [2021-06-05 05:01:34,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:34,174 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 592 transitions. [2021-06-05 05:01:34,174 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) [2021-06-05 05:01:34,174 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 592 transitions. [2021-06-05 05:01:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:34,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:34,174 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:34,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7522 [2021-06-05 05:01:34,374 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:34,375 INFO L82 PathProgramCache]: Analyzing trace with hash 421018234, now seen corresponding path program 322 times [2021-06-05 05:01:34,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:34,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918577694] [2021-06-05 05:01:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:34,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:34,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918577694] [2021-06-05 05:01:34,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918577694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:34,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939087151] [2021-06-05 05:01:34,524 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 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 [2021-06-05 05:01:34,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:34,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:34,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:34,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939087151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:34,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:34,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:01:34,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831303679] [2021-06-05 05:01:34,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:34,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:34,990 INFO L87 Difference]: Start difference. First operand 225 states and 592 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:35,458 INFO L93 Difference]: Finished difference Result 337 states and 773 transitions. [2021-06-05 05:01:35,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:01:35,458 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:01:35,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:35,459 INFO L225 Difference]: With dead ends: 337 [2021-06-05 05:01:35,459 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 05:01:35,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 518.8ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:01:35,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 05:01:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 224. [2021-06-05 05:01:35,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.6367713004484306) internal successors, (588), 223 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) [2021-06-05 05:01:35,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 588 transitions. [2021-06-05 05:01:35,461 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 588 transitions. Word has length 18 [2021-06-05 05:01:35,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:35,461 INFO L482 AbstractCegarLoop]: Abstraction has 224 states and 588 transitions. [2021-06-05 05:01:35,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:35,462 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 588 transitions. [2021-06-05 05:01:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:35,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:35,462 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:35,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7641 [2021-06-05 05:01:35,662 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:35,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:35,663 INFO L82 PathProgramCache]: Analyzing trace with hash 594265926, now seen corresponding path program 323 times [2021-06-05 05:01:35,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:35,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896916942] [2021-06-05 05:01:35,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:35,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:35,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896916942] [2021-06-05 05:01:35,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896916942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:35,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222793401] [2021-06-05 05:01:35,770 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 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 [2021-06-05 05:01:35,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:01:35,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:35,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:35,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:36,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:36,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222793401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:36,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:36,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:01:36,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391536732] [2021-06-05 05:01:36,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:36,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:36,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:36,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:36,154 INFO L87 Difference]: Start difference. First operand 224 states and 588 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) [2021-06-05 05:01:36,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:36,584 INFO L93 Difference]: Finished difference Result 320 states and 746 transitions. [2021-06-05 05:01:36,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:01:36,584 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 18 [2021-06-05 05:01:36,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:36,585 INFO L225 Difference]: With dead ends: 320 [2021-06-05 05:01:36,585 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 05:01:36,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:01:36,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 05:01:36,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 222. [2021-06-05 05:01:36,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:36,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 05:01:36,587 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 05:01:36,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:36,587 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 05:01:36,587 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) [2021-06-05 05:01:36,587 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 05:01:36,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:36,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:36,588 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:36,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7758,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:36,788 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:36,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:36,789 INFO L82 PathProgramCache]: Analyzing trace with hash -682821080, now seen corresponding path program 324 times [2021-06-05 05:01:36,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:36,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6723850] [2021-06-05 05:01:36,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:37,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6723850] [2021-06-05 05:01:37,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6723850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:37,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50357385] [2021-06-05 05:01:37,035 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 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 [2021-06-05 05:01:37,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:01:37,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:37,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:37,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50357385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:37,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:37,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:01:37,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677181517] [2021-06-05 05:01:37,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:37,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:37,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:37,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:37,716 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:01:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:38,185 INFO L93 Difference]: Finished difference Result 294 states and 697 transitions. [2021-06-05 05:01:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:01:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:01:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:38,186 INFO L225 Difference]: With dead ends: 294 [2021-06-05 05:01:38,186 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 05:01:38,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 678.3ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 05:01:38,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 222. [2021-06-05 05:01:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6289592760180995) internal successors, (581), 221 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 581 transitions. [2021-06-05 05:01:38,188 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 581 transitions. Word has length 18 [2021-06-05 05:01:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:38,189 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 581 transitions. [2021-06-05 05:01:38,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:01:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 581 transitions. [2021-06-05 05:01:38,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:38,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:38,189 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:38,389 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7840,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:38,389 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:38,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:38,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1008763556, now seen corresponding path program 325 times [2021-06-05 05:01:38,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:38,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454423594] [2021-06-05 05:01:38,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:38,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:38,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454423594] [2021-06-05 05:01:38,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454423594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:38,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605430378] [2021-06-05 05:01:38,539 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 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 [2021-06-05 05:01:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:38,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:38,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:39,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605430378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:39,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:39,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:01:39,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591878835] [2021-06-05 05:01:39,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:01:39,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:39,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:01:39,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:01:39,008 INFO L87 Difference]: Start difference. First operand 222 states and 581 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:01:39,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:39,546 INFO L93 Difference]: Finished difference Result 295 states and 697 transitions. [2021-06-05 05:01:39,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:01:39,546 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:01:39,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:39,546 INFO L225 Difference]: With dead ends: 295 [2021-06-05 05:01:39,546 INFO L226 Difference]: Without dead ends: 288 [2021-06-05 05:01:39,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 572.6ms TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:39,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-06-05 05:01:39,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 221. [2021-06-05 05:01:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6227272727272726) internal successors, (577), 220 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:39,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 577 transitions. [2021-06-05 05:01:39,549 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 577 transitions. Word has length 18 [2021-06-05 05:01:39,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:39,549 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 577 transitions. [2021-06-05 05:01:39,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:01:39,549 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 577 transitions. [2021-06-05 05:01:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:39,550 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:39,550 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:39,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8005 [2021-06-05 05:01:39,750 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:39,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:39,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1182011248, now seen corresponding path program 326 times [2021-06-05 05:01:39,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:39,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949592175] [2021-06-05 05:01:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:39,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:39,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949592175] [2021-06-05 05:01:39,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949592175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:39,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2147180837] [2021-06-05 05:01:39,975 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 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 [2021-06-05 05:01:40,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:40,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:40,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:01:40,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:40,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2147180837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:40,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:40,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 05:01:40,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517941244] [2021-06-05 05:01:40,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:40,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:40,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:40,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:40,497 INFO L87 Difference]: Start difference. First operand 221 states and 577 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) [2021-06-05 05:01:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:41,339 INFO L93 Difference]: Finished difference Result 320 states and 732 transitions. [2021-06-05 05:01:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:01:41,340 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 18 [2021-06-05 05:01:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:41,340 INFO L225 Difference]: With dead ends: 320 [2021-06-05 05:01:41,340 INFO L226 Difference]: Without dead ends: 306 [2021-06-05 05:01:41,340 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1018.1ms TimeCoverageRelationStatistics Valid=132, Invalid=924, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:01:41,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-06-05 05:01:41,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 219. [2021-06-05 05:01:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.614678899082569) internal successors, (570), 218 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) [2021-06-05 05:01:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 570 transitions. [2021-06-05 05:01:41,343 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 570 transitions. Word has length 18 [2021-06-05 05:01:41,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:41,343 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 570 transitions. [2021-06-05 05:01:41,343 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) [2021-06-05 05:01:41,343 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 570 transitions. [2021-06-05 05:01:41,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:41,343 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:41,343 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:41,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8123,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:41,544 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:41,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:41,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2037244892, now seen corresponding path program 327 times [2021-06-05 05:01:41,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:41,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981268329] [2021-06-05 05:01:41,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:41,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:41,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:41,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981268329] [2021-06-05 05:01:41,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981268329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:41,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275068213] [2021-06-05 05:01:41,666 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 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 [2021-06-05 05:01:41,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:01:41,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:41,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:41,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:42,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:42,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275068213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:42,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:42,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:01:42,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049477900] [2021-06-05 05:01:42,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:42,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:42,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:42,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:42,084 INFO L87 Difference]: Start difference. First operand 219 states and 570 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:01:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:42,589 INFO L93 Difference]: Finished difference Result 294 states and 689 transitions. [2021-06-05 05:01:42,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:01:42,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-06-05 05:01:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:42,590 INFO L225 Difference]: With dead ends: 294 [2021-06-05 05:01:42,590 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 05:01:42,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 571.8ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:42,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 05:01:42,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 216. [2021-06-05 05:01:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.604651162790698) internal successors, (560), 215 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:42,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 560 transitions. [2021-06-05 05:01:42,592 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 560 transitions. Word has length 18 [2021-06-05 05:01:42,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:42,593 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 560 transitions. [2021-06-05 05:01:42,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:01:42,593 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 560 transitions. [2021-06-05 05:01:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:42,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:42,593 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:42,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8210 [2021-06-05 05:01:42,793 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:42,794 INFO L82 PathProgramCache]: Analyzing trace with hash 357414718, now seen corresponding path program 328 times [2021-06-05 05:01:42,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:42,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867365896] [2021-06-05 05:01:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:42,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:42,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867365896] [2021-06-05 05:01:42,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867365896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:42,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776265269] [2021-06-05 05:01:42,941 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 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 [2021-06-05 05:01:42,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:42,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:42,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:42,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:43,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:43,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776265269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:43,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:43,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:01:43,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523637948] [2021-06-05 05:01:43,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:43,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:43,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:43,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:43,487 INFO L87 Difference]: Start difference. First operand 216 states and 560 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:44,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:44,006 INFO L93 Difference]: Finished difference Result 342 states and 778 transitions. [2021-06-05 05:01:44,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:44,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:01:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:44,007 INFO L225 Difference]: With dead ends: 342 [2021-06-05 05:01:44,007 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 05:01:44,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 531.8ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:01:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 05:01:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 226. [2021-06-05 05:01:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.64) internal successors, (594), 225 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:44,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 594 transitions. [2021-06-05 05:01:44,009 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 594 transitions. Word has length 18 [2021-06-05 05:01:44,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:44,009 INFO L482 AbstractCegarLoop]: Abstraction has 226 states and 594 transitions. [2021-06-05 05:01:44,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:44,010 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 594 transitions. [2021-06-05 05:01:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:44,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:44,010 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:44,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 332 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8286 [2021-06-05 05:01:44,210 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:44,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 2048999354, now seen corresponding path program 329 times [2021-06-05 05:01:44,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:44,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622462446] [2021-06-05 05:01:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:44,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:44,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622462446] [2021-06-05 05:01:44,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622462446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:44,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860970776] [2021-06-05 05:01:44,365 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 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 [2021-06-05 05:01:44,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:01:44,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:44,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:44,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:44,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860970776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:44,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:44,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:01:44,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514011717] [2021-06-05 05:01:44,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:44,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:44,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:44,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:44,853 INFO L87 Difference]: Start difference. First operand 226 states and 594 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) [2021-06-05 05:01:45,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:45,340 INFO L93 Difference]: Finished difference Result 346 states and 783 transitions. [2021-06-05 05:01:45,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:45,341 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 18 [2021-06-05 05:01:45,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:45,341 INFO L225 Difference]: With dead ends: 346 [2021-06-05 05:01:45,341 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 05:01:45,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 569.5ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:45,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 05:01:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 225. [2021-06-05 05:01:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.6339285714285716) internal successors, (590), 224 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) [2021-06-05 05:01:45,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 590 transitions. [2021-06-05 05:01:45,344 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 590 transitions. Word has length 18 [2021-06-05 05:01:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:45,344 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 590 transitions. [2021-06-05 05:01:45,344 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) [2021-06-05 05:01:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 590 transitions. [2021-06-05 05:01:45,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:45,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:45,344 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:45,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8443 [2021-06-05 05:01:45,545 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:45,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:45,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2072720250, now seen corresponding path program 330 times [2021-06-05 05:01:45,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:45,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763001152] [2021-06-05 05:01:45,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:45,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763001152] [2021-06-05 05:01:45,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763001152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:45,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380479604] [2021-06-05 05:01:45,786 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 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 [2021-06-05 05:01:45,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:01:45,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:45,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:45,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:46,278 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:46,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380479604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:46,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:46,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:46,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312005309] [2021-06-05 05:01:46,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:46,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:46,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:46,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:46,279 INFO L87 Difference]: Start difference. First operand 225 states and 590 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) [2021-06-05 05:01:46,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:46,897 INFO L93 Difference]: Finished difference Result 357 states and 795 transitions. [2021-06-05 05:01:46,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:01:46,897 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 18 [2021-06-05 05:01:46,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:46,898 INFO L225 Difference]: With dead ends: 357 [2021-06-05 05:01:46,898 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 05:01:46,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 755.0ms TimeCoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:01:46,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 05:01:46,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 223. [2021-06-05 05:01:46,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.626126126126126) internal successors, (583), 222 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:46,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 583 transitions. [2021-06-05 05:01:46,901 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 583 transitions. Word has length 18 [2021-06-05 05:01:46,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:46,901 INFO L482 AbstractCegarLoop]: Abstraction has 223 states and 583 transitions. [2021-06-05 05:01:46,901 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) [2021-06-05 05:01:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 583 transitions. [2021-06-05 05:01:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:46,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:46,901 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:47,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8563,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:47,102 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:47,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:47,102 INFO L82 PathProgramCache]: Analyzing trace with hash -997009094, now seen corresponding path program 331 times [2021-06-05 05:01:47,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:47,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125697397] [2021-06-05 05:01:47,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:47,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:47,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125697397] [2021-06-05 05:01:47,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125697397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:47,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316664315] [2021-06-05 05:01:47,549 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 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 [2021-06-05 05:01:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:47,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:47,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:48,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316664315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:48,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:48,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:48,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433772909] [2021-06-05 05:01:48,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:48,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:48,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:48,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:48,015 INFO L87 Difference]: Start difference. First operand 223 states and 583 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) [2021-06-05 05:01:48,272 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2021-06-05 05:01:48,644 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2021-06-05 05:01:48,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:48,847 INFO L93 Difference]: Finished difference Result 242 states and 611 transitions. [2021-06-05 05:01:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:01:48,848 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 [2021-06-05 05:01:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:48,848 INFO L225 Difference]: With dead ends: 242 [2021-06-05 05:01:48,848 INFO L226 Difference]: Without dead ends: 235 [2021-06-05 05:01:48,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1239.4ms TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:01:48,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-05 05:01:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 222. [2021-06-05 05:01:48,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6244343891402715) internal successors, (580), 221 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:48,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 580 transitions. [2021-06-05 05:01:48,851 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 580 transitions. Word has length 18 [2021-06-05 05:01:48,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:48,851 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 580 transitions. [2021-06-05 05:01:48,851 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) [2021-06-05 05:01:48,851 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 580 transitions. [2021-06-05 05:01:48,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:48,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:48,851 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:49,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8659,335 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:49,052 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:49,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:49,052 INFO L82 PathProgramCache]: Analyzing trace with hash -2009701626, now seen corresponding path program 332 times [2021-06-05 05:01:49,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:49,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706651831] [2021-06-05 05:01:49,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:49,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:49,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706651831] [2021-06-05 05:01:49,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706651831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927954188] [2021-06-05 05:01:49,274 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 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 [2021-06-05 05:01:49,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:49,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:49,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:49,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:49,726 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:49,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927954188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:49,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:49,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:01:49,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498925253] [2021-06-05 05:01:49,727 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:49,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:49,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:49,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:49,727 INFO L87 Difference]: Start difference. First operand 222 states and 580 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:01:50,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:50,113 INFO L93 Difference]: Finished difference Result 320 states and 730 transitions. [2021-06-05 05:01:50,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:50,113 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 18 [2021-06-05 05:01:50,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:50,113 INFO L225 Difference]: With dead ends: 320 [2021-06-05 05:01:50,113 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 05:01:50,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:01:50,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 05:01:50,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 230. [2021-06-05 05:01:50,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:50,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-06-05 05:01:50,116 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-06-05 05:01:50,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:50,116 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-06-05 05:01:50,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:01:50,116 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-06-05 05:01:50,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:50,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:50,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:50,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8692,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:50,329 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:50,329 INFO L82 PathProgramCache]: Analyzing trace with hash 923469522, now seen corresponding path program 333 times [2021-06-05 05:01:50,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:50,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199805727] [2021-06-05 05:01:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:50,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:50,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:50,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199805727] [2021-06-05 05:01:50,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199805727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:50,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947104412] [2021-06-05 05:01:50,496 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 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 [2021-06-05 05:01:50,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:01:50,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:50,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:50,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947104412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:50,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:50,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:50,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148352921] [2021-06-05 05:01:50,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:50,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:50,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:50,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:50,928 INFO L87 Difference]: Start difference. First operand 230 states and 594 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) [2021-06-05 05:01:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:51,308 INFO L93 Difference]: Finished difference Result 363 states and 828 transitions. [2021-06-05 05:01:51,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:51,309 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 18 [2021-06-05 05:01:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:51,309 INFO L225 Difference]: With dead ends: 363 [2021-06-05 05:01:51,309 INFO L226 Difference]: Without dead ends: 356 [2021-06-05 05:01:51,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 492.9ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:01:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-06-05 05:01:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 243. [2021-06-05 05:01:51,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.6198347107438016) internal successors, (634), 242 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) [2021-06-05 05:01:51,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 634 transitions. [2021-06-05 05:01:51,312 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 634 transitions. Word has length 18 [2021-06-05 05:01:51,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:51,312 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 634 transitions. [2021-06-05 05:01:51,312 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) [2021-06-05 05:01:51,312 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 634 transitions. [2021-06-05 05:01:51,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:51,312 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:51,312 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:51,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8764 [2021-06-05 05:01:51,513 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:51,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:51,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2059573526, now seen corresponding path program 334 times [2021-06-05 05:01:51,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:51,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078909654] [2021-06-05 05:01:51,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:51,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:51,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:51,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078909654] [2021-06-05 05:01:51,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078909654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:51,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21842258] [2021-06-05 05:01:51,727 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 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 [2021-06-05 05:01:51,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:01:51,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:51,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:51,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:52,167 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:52,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21842258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:52,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:52,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:01:52,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604832467] [2021-06-05 05:01:52,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:01:52,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:52,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:01:52,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:01:52,168 INFO L87 Difference]: Start difference. First operand 243 states and 634 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) [2021-06-05 05:01:52,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:52,987 INFO L93 Difference]: Finished difference Result 411 states and 910 transitions. [2021-06-05 05:01:52,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:01:52,987 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 18 [2021-06-05 05:01:52,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:52,988 INFO L225 Difference]: With dead ends: 411 [2021-06-05 05:01:52,988 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 05:01:52,988 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 912.9ms TimeCoverageRelationStatistics Valid=102, Invalid=768, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:01:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 05:01:52,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-06-05 05:01:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:52,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-06-05 05:01:52,991 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-06-05 05:01:52,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:52,991 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-06-05 05:01:52,991 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) [2021-06-05 05:01:52,991 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-06-05 05:01:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:52,991 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:52,991 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:53,191 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8836 [2021-06-05 05:01:53,192 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:53,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:53,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1819127378, now seen corresponding path program 335 times [2021-06-05 05:01:53,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:53,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202972851] [2021-06-05 05:01:53,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:53,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:53,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:53,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202972851] [2021-06-05 05:01:53,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202972851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:53,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972465386] [2021-06-05 05:01:53,483 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 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 [2021-06-05 05:01:53,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:01:53,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:53,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:53,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:53,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972465386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:53,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:53,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:53,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024985902] [2021-06-05 05:01:53,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:53,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:53,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:53,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:53,991 INFO L87 Difference]: Start difference. First operand 246 states and 644 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) [2021-06-05 05:01:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:54,966 INFO L93 Difference]: Finished difference Result 415 states and 922 transitions. [2021-06-05 05:01:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:01:54,966 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 18 [2021-06-05 05:01:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:54,966 INFO L225 Difference]: With dead ends: 415 [2021-06-05 05:01:54,966 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 05:01:54,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1083.8ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:01:54,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 05:01:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 248. [2021-06-05 05:01:54,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:54,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-06-05 05:01:54,969 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-06-05 05:01:54,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:54,970 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-06-05 05:01:54,970 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) [2021-06-05 05:01:54,970 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-06-05 05:01:54,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:54,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:54,970 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:55,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8912,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:01:55,171 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:55,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:55,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1118634390, now seen corresponding path program 336 times [2021-06-05 05:01:55,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:55,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432713504] [2021-06-05 05:01:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:55,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432713504] [2021-06-05 05:01:55,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432713504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:55,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340819234] [2021-06-05 05:01:55,471 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 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 [2021-06-05 05:01:55,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:01:55,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:55,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:01:55,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:55,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,847 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 22 treesize of output 16 [2021-06-05 05:01:55,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,853 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 30 treesize of output 22 [2021-06-05 05:01:55,854 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,859 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 31 treesize of output 23 [2021-06-05 05:01:55,860 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,865 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 23 treesize of output 17 [2021-06-05 05:01:55,866 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,872 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 31 treesize of output 23 [2021-06-05 05:01:55,872 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,883 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 29 treesize of output 21 [2021-06-05 05:01:55,884 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,890 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 38 treesize of output 28 [2021-06-05 05:01:55,891 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,896 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 37 treesize of output 27 [2021-06-05 05:01:55,897 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,906 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 30 treesize of output 22 [2021-06-05 05:01:55,906 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,913 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 30 treesize of output 22 [2021-06-05 05:01:55,914 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,919 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 29 treesize of output 21 [2021-06-05 05:01:55,920 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,925 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 23 treesize of output 17 [2021-06-05 05:01:55,926 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,931 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 23 treesize of output 17 [2021-06-05 05:01:55,932 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,937 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:01:55,937 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,943 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 23 treesize of output 17 [2021-06-05 05:01:55,943 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:01:55,949 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,954 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 22 treesize of output 16 [2021-06-05 05:01:55,954 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:55,958 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:01:55,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:01:55,960 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:01:56,092 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 50 [2021-06-05 05:01:56,092 INFO L628 ElimStorePlain]: treesize reduction 404, result has 19.4 percent of original size [2021-06-05 05:01:56,092 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:01:56,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:01:56,094 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 6 variables, input treesize:1057, output treesize:85 [2021-06-05 05:01:56,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:56,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340819234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:56,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:56,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:01:56,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065928285] [2021-06-05 05:01:56,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:01:56,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:56,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:01:56,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:01:56,251 INFO L87 Difference]: Start difference. First operand 248 states and 651 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) [2021-06-05 05:01:56,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:56,931 INFO L93 Difference]: Finished difference Result 412 states and 942 transitions. [2021-06-05 05:01:56,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:01:56,931 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 [2021-06-05 05:01:56,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:56,932 INFO L225 Difference]: With dead ends: 412 [2021-06-05 05:01:56,932 INFO L226 Difference]: Without dead ends: 398 [2021-06-05 05:01:56,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 975.6ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:01:56,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-06-05 05:01:56,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 262. [2021-06-05 05:01:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.67816091954023) internal successors, (699), 261 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:56,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 699 transitions. [2021-06-05 05:01:56,935 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 699 transitions. Word has length 18 [2021-06-05 05:01:56,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:56,935 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 699 transitions. [2021-06-05 05:01:56,935 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) [2021-06-05 05:01:56,935 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 699 transitions. [2021-06-05 05:01:56,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:56,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:56,935 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:57,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9024 [2021-06-05 05:01:57,136 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:57,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:57,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1484748270, now seen corresponding path program 337 times [2021-06-05 05:01:57,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:57,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949179932] [2021-06-05 05:01:57,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:57,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:57,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:57,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949179932] [2021-06-05 05:01:57,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949179932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:57,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887104997] [2021-06-05 05:01:57,293 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 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 [2021-06-05 05:01:57,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:57,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:01:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:57,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887104997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:57,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:57,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:01:57,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181368881] [2021-06-05 05:01:57,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:57,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:57,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:57,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:57,834 INFO L87 Difference]: Start difference. First operand 262 states and 699 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:58,415 INFO L93 Difference]: Finished difference Result 411 states and 940 transitions. [2021-06-05 05:01:58,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:01:58,415 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:01:58,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:58,416 INFO L225 Difference]: With dead ends: 411 [2021-06-05 05:01:58,416 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 05:01:58,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 606.8ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:58,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 05:01:58,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 246. [2021-06-05 05:01:58,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6285714285714286) internal successors, (644), 245 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:58,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 644 transitions. [2021-06-05 05:01:58,419 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 644 transitions. Word has length 18 [2021-06-05 05:01:58,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:58,419 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 644 transitions. [2021-06-05 05:01:58,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:01:58,419 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 644 transitions. [2021-06-05 05:01:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:58,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:58,419 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:01:58,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9040 [2021-06-05 05:01:58,620 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:01:58,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:01:58,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1548351786, now seen corresponding path program 338 times [2021-06-05 05:01:58,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:01:58,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552725103] [2021-06-05 05:01:58,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:01:58,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:01:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:01:58,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:01:58,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552725103] [2021-06-05 05:01:58,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552725103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:58,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183396984] [2021-06-05 05:01:58,724 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 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 [2021-06-05 05:01:58,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:01:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:01:58,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:01:58,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:01:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:01:59,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183396984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:01:59,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:01:59,269 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 05:01:59,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870427427] [2021-06-05 05:01:59,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:01:59,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:01:59,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:01:59,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:01:59,269 INFO L87 Difference]: Start difference. First operand 246 states and 644 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) [2021-06-05 05:01:59,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:01:59,911 INFO L93 Difference]: Finished difference Result 359 states and 837 transitions. [2021-06-05 05:01:59,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:01:59,911 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 18 [2021-06-05 05:01:59,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:01:59,912 INFO L225 Difference]: With dead ends: 359 [2021-06-05 05:01:59,912 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 05:01:59,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 616.7ms TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:01:59,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 05:01:59,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 248. [2021-06-05 05:01:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6356275303643724) internal successors, (651), 247 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:01:59,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 651 transitions. [2021-06-05 05:01:59,915 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 651 transitions. Word has length 18 [2021-06-05 05:01:59,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:01:59,915 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 651 transitions. [2021-06-05 05:01:59,915 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) [2021-06-05 05:01:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 651 transitions. [2021-06-05 05:01:59,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:01:59,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:01:59,915 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:00,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9193,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:00,116 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:00,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:00,116 INFO L82 PathProgramCache]: Analyzing trace with hash -2083581588, now seen corresponding path program 339 times [2021-06-05 05:02:00,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:00,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000699938] [2021-06-05 05:02:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:00,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:00,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:00,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000699938] [2021-06-05 05:02:00,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000699938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:00,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574683197] [2021-06-05 05:02:00,255 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 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 [2021-06-05 05:02:00,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:02:00,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:00,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:00,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:00,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574683197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:00,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:00,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:02:00,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787839058] [2021-06-05 05:02:00,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:02:00,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:00,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:02:00,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:02:00,562 INFO L87 Difference]: Start difference. First operand 248 states and 651 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) [2021-06-05 05:02:00,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:00,857 INFO L93 Difference]: Finished difference Result 353 states and 827 transitions. [2021-06-05 05:02:00,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:02:00,857 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 18 [2021-06-05 05:02:00,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:00,858 INFO L225 Difference]: With dead ends: 353 [2021-06-05 05:02:00,858 INFO L226 Difference]: Without dead ends: 346 [2021-06-05 05:02:00,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:00,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-06-05 05:02:00,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 251. [2021-06-05 05:02:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.648) internal successors, (662), 250 states have internal predecessors, (662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:00,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 662 transitions. [2021-06-05 05:02:00,860 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 662 transitions. Word has length 18 [2021-06-05 05:02:00,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:00,861 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 662 transitions. [2021-06-05 05:02:00,861 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) [2021-06-05 05:02:00,861 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 662 transitions. [2021-06-05 05:02:00,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:00,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:00,861 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:01,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9342 [2021-06-05 05:02:01,062 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:01,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:01,062 INFO L82 PathProgramCache]: Analyzing trace with hash -391996952, now seen corresponding path program 340 times [2021-06-05 05:02:01,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:01,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260000352] [2021-06-05 05:02:01,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:01,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:01,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260000352] [2021-06-05 05:02:01,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260000352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:01,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999702716] [2021-06-05 05:02:01,169 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 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 [2021-06-05 05:02:01,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:01,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:01,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:01,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:01,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999702716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:01,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:01,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:02:01,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628702495] [2021-06-05 05:02:01,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:02:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:02:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:02:01,454 INFO L87 Difference]: Start difference. First operand 251 states and 662 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) [2021-06-05 05:02:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:01,723 INFO L93 Difference]: Finished difference Result 355 states and 829 transitions. [2021-06-05 05:02:01,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:02:01,724 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 18 [2021-06-05 05:02:01,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:01,724 INFO L225 Difference]: With dead ends: 355 [2021-06-05 05:02:01,724 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 05:02:01,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:01,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 05:02:01,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 250. [2021-06-05 05:02:01,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.642570281124498) internal successors, (658), 249 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:01,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 658 transitions. [2021-06-05 05:02:01,727 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 658 transitions. Word has length 18 [2021-06-05 05:02:01,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:01,727 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 658 transitions. [2021-06-05 05:02:01,727 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) [2021-06-05 05:02:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 658 transitions. [2021-06-05 05:02:01,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:01,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:01,727 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:01,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9377,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:01,928 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:01,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:01,928 INFO L82 PathProgramCache]: Analyzing trace with hash -218749260, now seen corresponding path program 341 times [2021-06-05 05:02:01,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:01,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211929867] [2021-06-05 05:02:01,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:02,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211929867] [2021-06-05 05:02:02,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211929867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:02,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448805230] [2021-06-05 05:02:02,042 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 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 [2021-06-05 05:02:02,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:02:02,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:02,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:02,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:02,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:02,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448805230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:02,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:02,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:02:02,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143762481] [2021-06-05 05:02:02,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:02,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:02,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:02,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:02,378 INFO L87 Difference]: Start difference. First operand 250 states and 658 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) [2021-06-05 05:02:02,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:02,730 INFO L93 Difference]: Finished difference Result 338 states and 801 transitions. [2021-06-05 05:02:02,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:02:02,730 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 18 [2021-06-05 05:02:02,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:02,731 INFO L225 Difference]: With dead ends: 338 [2021-06-05 05:02:02,731 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 05:02:02,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 453.9ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:02:02,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 05:02:02,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 233. [2021-06-05 05:02:02,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.5948275862068964) internal successors, (602), 232 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) [2021-06-05 05:02:02,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 602 transitions. [2021-06-05 05:02:02,733 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 602 transitions. Word has length 18 [2021-06-05 05:02:02,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:02,733 INFO L482 AbstractCegarLoop]: Abstraction has 233 states and 602 transitions. [2021-06-05 05:02:02,733 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) [2021-06-05 05:02:02,734 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 602 transitions. [2021-06-05 05:02:02,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:02,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:02,734 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:02,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9411 [2021-06-05 05:02:02,934 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:02,935 INFO L82 PathProgramCache]: Analyzing trace with hash 46441558, now seen corresponding path program 342 times [2021-06-05 05:02:02,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:02,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169409708] [2021-06-05 05:02:02,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:02,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:03,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:03,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169409708] [2021-06-05 05:02:03,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169409708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:03,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861910685] [2021-06-05 05:02:03,050 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 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 [2021-06-05 05:02:03,079 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:02:03,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:03,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:03,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:03,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861910685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:03,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:03,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:02:03,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83430886] [2021-06-05 05:02:03,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:02:03,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:03,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:02:03,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:02:03,615 INFO L87 Difference]: Start difference. First operand 233 states and 602 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:02:04,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:04,103 INFO L93 Difference]: Finished difference Result 324 states and 767 transitions. [2021-06-05 05:02:04,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:02:04,103 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:02:04,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:04,104 INFO L225 Difference]: With dead ends: 324 [2021-06-05 05:02:04,104 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 05:02:04,104 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 498.4ms TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:02:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 05:02:04,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 235. [2021-06-05 05:02:04,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6025641025641026) internal successors, (609), 234 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) [2021-06-05 05:02:04,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 609 transitions. [2021-06-05 05:02:04,107 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 609 transitions. Word has length 18 [2021-06-05 05:02:04,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:04,107 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 609 transitions. [2021-06-05 05:02:04,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:02:04,107 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 609 transitions. [2021-06-05 05:02:04,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:04,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:04,107 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:04,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9445 [2021-06-05 05:02:04,308 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:04,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:04,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1920051630, now seen corresponding path program 343 times [2021-06-05 05:02:04,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:04,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371609064] [2021-06-05 05:02:04,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:04,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:04,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:04,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371609064] [2021-06-05 05:02:04,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371609064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:04,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849749872] [2021-06-05 05:02:04,415 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 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 [2021-06-05 05:02:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:04,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:04,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:04,813 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:04,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849749872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:04,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:04,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:02:04,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846720563] [2021-06-05 05:02:04,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:04,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:04,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:04,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:04,814 INFO L87 Difference]: Start difference. First operand 235 states and 609 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) [2021-06-05 05:02:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:05,219 INFO L93 Difference]: Finished difference Result 332 states and 792 transitions. [2021-06-05 05:02:05,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:02:05,219 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 18 [2021-06-05 05:02:05,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:05,220 INFO L225 Difference]: With dead ends: 332 [2021-06-05 05:02:05,220 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 05:02:05,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 493.7ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:02:05,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 05:02:05,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 248. [2021-06-05 05:02:05,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 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) [2021-06-05 05:02:05,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 05:02:05,223 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 05:02:05,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:05,223 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 05:02:05,223 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) [2021-06-05 05:02:05,223 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 05:02:05,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:05,223 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:05,223 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:05,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9616,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:05,424 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:05,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:05,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1674422678, now seen corresponding path program 344 times [2021-06-05 05:02:05,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:05,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609006055] [2021-06-05 05:02:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:05,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:05,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:05,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609006055] [2021-06-05 05:02:05,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609006055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:05,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266113460] [2021-06-05 05:02:05,552 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 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 [2021-06-05 05:02:05,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:05,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:05,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:02:05,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:06,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266113460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:06,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:06,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2021-06-05 05:02:06,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230082527] [2021-06-05 05:02:06,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:06,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:06,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:06,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:06,153 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2021-06-05 05:02:06,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:06,900 INFO L93 Difference]: Finished difference Result 369 states and 848 transitions. [2021-06-05 05:02:06,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:02:06,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 [2021-06-05 05:02:06,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:06,900 INFO L225 Difference]: With dead ends: 369 [2021-06-05 05:02:06,900 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 05:02:06,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 765.9ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:02:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 05:02:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 249. [2021-06-05 05:02:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-06-05 05:02:06,903 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-06-05 05:02:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:06,903 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-06-05 05:02:06,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2021-06-05 05:02:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-06-05 05:02:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:06,904 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:06,904 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:07,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9698 [2021-06-05 05:02:07,104 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash -928959982, now seen corresponding path program 345 times [2021-06-05 05:02:07,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:07,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827734249] [2021-06-05 05:02:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:07,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:07,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827734249] [2021-06-05 05:02:07,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827734249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:07,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633031851] [2021-06-05 05:02:07,258 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 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 [2021-06-05 05:02:07,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:02:07,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:07,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:07,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:07,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633031851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:07,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:07,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 05:02:07,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073122696] [2021-06-05 05:02:07,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:07,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:07,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:07,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:07,709 INFO L87 Difference]: Start difference. First operand 249 states and 652 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2021-06-05 05:02:08,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:08,180 INFO L93 Difference]: Finished difference Result 329 states and 785 transitions. [2021-06-05 05:02:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:02:08,180 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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 [2021-06-05 05:02:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:08,181 INFO L225 Difference]: With dead ends: 329 [2021-06-05 05:02:08,181 INFO L226 Difference]: Without dead ends: 322 [2021-06-05 05:02:08,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 535.8ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:02:08,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2021-06-05 05:02:08,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 248. [2021-06-05 05:02:08,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 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) [2021-06-05 05:02:08,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 05:02:08,183 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 05:02:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:08,184 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 05:02:08,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 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) [2021-06-05 05:02:08,184 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 05:02:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:08,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:08,184 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:08,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9870,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:08,384 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:08,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1139192876, now seen corresponding path program 346 times [2021-06-05 05:02:08,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:08,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604968523] [2021-06-05 05:02:08,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:08,533 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:08,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:08,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604968523] [2021-06-05 05:02:08,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604968523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:08,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654346117] [2021-06-05 05:02:08,533 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 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 [2021-06-05 05:02:08,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:08,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:08,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:08,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654346117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:08,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:08,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:02:08,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078867704] [2021-06-05 05:02:08,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:08,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:08,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:08,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:08,820 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:02:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:09,253 INFO L93 Difference]: Finished difference Result 326 states and 778 transitions. [2021-06-05 05:02:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:02:09,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:02:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:09,254 INFO L225 Difference]: With dead ends: 326 [2021-06-05 05:02:09,254 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 05:02:09,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 481.3ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:02:09,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 05:02:09,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 248. [2021-06-05 05:02:09,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.623481781376518) internal successors, (648), 247 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) [2021-06-05 05:02:09,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 648 transitions. [2021-06-05 05:02:09,257 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 648 transitions. Word has length 18 [2021-06-05 05:02:09,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:09,257 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 648 transitions. [2021-06-05 05:02:09,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:02:09,257 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 648 transitions. [2021-06-05 05:02:09,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:09,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:09,257 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:09,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9988 [2021-06-05 05:02:09,458 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:09,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:09,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1464189784, now seen corresponding path program 347 times [2021-06-05 05:02:09,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:09,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298875194] [2021-06-05 05:02:09,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:09,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:09,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:09,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:09,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298875194] [2021-06-05 05:02:09,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298875194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:09,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179098427] [2021-06-05 05:02:09,632 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 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 [2021-06-05 05:02:09,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:02:09,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:09,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:09,960 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:09,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179098427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:09,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:09,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:02:09,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896647464] [2021-06-05 05:02:09,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:09,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:09,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:09,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:09,961 INFO L87 Difference]: Start difference. First operand 248 states and 648 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:10,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:10,355 INFO L93 Difference]: Finished difference Result 327 states and 778 transitions. [2021-06-05 05:02:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:02:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:02:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:10,356 INFO L225 Difference]: With dead ends: 327 [2021-06-05 05:02:10,356 INFO L226 Difference]: Without dead ends: 320 [2021-06-05 05:02:10,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 524.0ms TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:02:10,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2021-06-05 05:02:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 247. [2021-06-05 05:02:10,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6178861788617884) internal successors, (644), 246 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:10,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 644 transitions. [2021-06-05 05:02:10,358 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 644 transitions. Word has length 18 [2021-06-05 05:02:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:10,358 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 644 transitions. [2021-06-05 05:02:10,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:10,359 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 644 transitions. [2021-06-05 05:02:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:10,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:10,359 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:10,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10022 [2021-06-05 05:02:10,559 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:10,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:10,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1290942092, now seen corresponding path program 348 times [2021-06-05 05:02:10,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:10,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56804743] [2021-06-05 05:02:10,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:10,669 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:10,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:10,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56804743] [2021-06-05 05:02:10,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56804743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:10,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787151917] [2021-06-05 05:02:10,670 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 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 [2021-06-05 05:02:10,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:02:10,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:10,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:02:10,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:11,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:11,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787151917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:11,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:11,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 05:02:11,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114393990] [2021-06-05 05:02:11,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:11,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:11,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:11,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:11,259 INFO L87 Difference]: Start difference. First operand 247 states and 644 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) [2021-06-05 05:02:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:11,807 INFO L93 Difference]: Finished difference Result 317 states and 758 transitions. [2021-06-05 05:02:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:02:11,807 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 [2021-06-05 05:02:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:11,808 INFO L225 Difference]: With dead ends: 317 [2021-06-05 05:02:11,808 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 05:02:11,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:11,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 05:02:11,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 245. [2021-06-05 05:02:11,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.610655737704918) internal successors, (637), 244 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:11,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 637 transitions. [2021-06-05 05:02:11,810 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 637 transitions. Word has length 18 [2021-06-05 05:02:11,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:11,810 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 637 transitions. [2021-06-05 05:02:11,810 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) [2021-06-05 05:02:11,811 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 637 transitions. [2021-06-05 05:02:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:11,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:11,811 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:12,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10057,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:12,011 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:12,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1726938198, now seen corresponding path program 349 times [2021-06-05 05:02:12,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:12,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413205339] [2021-06-05 05:02:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:12,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:12,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413205339] [2021-06-05 05:02:12,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413205339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:12,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149074251] [2021-06-05 05:02:12,159 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 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 [2021-06-05 05:02:12,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:12,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:12,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:12,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149074251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:12,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:12,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:02:12,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303079532] [2021-06-05 05:02:12,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:12,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:12,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:12,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:12,471 INFO L87 Difference]: Start difference. First operand 245 states and 637 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:02:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:12,910 INFO L93 Difference]: Finished difference Result 364 states and 845 transitions. [2021-06-05 05:02:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:12,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:02:12,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:12,910 INFO L225 Difference]: With dead ends: 364 [2021-06-05 05:02:12,910 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 05:02:12,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 492.0ms TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:02:12,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 05:02:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 251. [2021-06-05 05:02:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:12,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-06-05 05:02:12,913 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-06-05 05:02:12,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:12,913 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-06-05 05:02:12,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:02:12,913 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-06-05 05:02:12,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:12,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:12,914 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:13,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10151,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:13,114 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:13,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:13,114 INFO L82 PathProgramCache]: Analyzing trace with hash -876444462, now seen corresponding path program 350 times [2021-06-05 05:02:13,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:13,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121969298] [2021-06-05 05:02:13,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:13,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:13,452 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:13,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:13,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121969298] [2021-06-05 05:02:13,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121969298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:13,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385038095] [2021-06-05 05:02:13,453 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 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 [2021-06-05 05:02:13,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:13,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:13,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:13,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:13,829 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:13,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385038095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:13,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:13,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 20 [2021-06-05 05:02:13,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143422699] [2021-06-05 05:02:13,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:02:13,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:02:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:02:13,830 INFO L87 Difference]: Start difference. First operand 251 states and 658 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) [2021-06-05 05:02:14,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:14,595 INFO L93 Difference]: Finished difference Result 392 states and 887 transitions. [2021-06-05 05:02:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:02:14,595 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 18 [2021-06-05 05:02:14,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:14,595 INFO L225 Difference]: With dead ends: 392 [2021-06-05 05:02:14,595 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 05:02:14,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 935.9ms TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:02:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 05:02:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 250. [2021-06-05 05:02:14,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:14,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-06-05 05:02:14,598 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-06-05 05:02:14,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:14,598 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-06-05 05:02:14,598 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) [2021-06-05 05:02:14,598 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-06-05 05:02:14,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:14,599 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:14,599 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:14,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10185,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:14,799 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:14,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:14,800 INFO L82 PathProgramCache]: Analyzing trace with hash -703196770, now seen corresponding path program 351 times [2021-06-05 05:02:14,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:14,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922509852] [2021-06-05 05:02:14,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:14,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:14,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922509852] [2021-06-05 05:02:14,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922509852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:14,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792994615] [2021-06-05 05:02:14,944 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 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 [2021-06-05 05:02:14,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:02:14,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:14,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:14,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:15,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:15,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792994615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:15,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:15,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:02:15,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080353228] [2021-06-05 05:02:15,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:15,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:15,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:15,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:15,326 INFO L87 Difference]: Start difference. First operand 250 states and 654 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:15,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:15,913 INFO L93 Difference]: Finished difference Result 360 states and 831 transitions. [2021-06-05 05:02:15,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:02:15,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-06-05 05:02:15,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:15,914 INFO L225 Difference]: With dead ends: 360 [2021-06-05 05:02:15,914 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 05:02:15,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 647.9ms TimeCoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:02:15,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 05:02:15,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 246. [2021-06-05 05:02:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6122448979591835) internal successors, (640), 245 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) [2021-06-05 05:02:15,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 640 transitions. [2021-06-05 05:02:15,917 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 640 transitions. Word has length 18 [2021-06-05 05:02:15,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:15,917 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 640 transitions. [2021-06-05 05:02:15,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 640 transitions. [2021-06-05 05:02:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:15,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:15,917 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:16,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10220 [2021-06-05 05:02:16,118 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:16,118 INFO L82 PathProgramCache]: Analyzing trace with hash 372514386, now seen corresponding path program 352 times [2021-06-05 05:02:16,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:16,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374013959] [2021-06-05 05:02:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:16,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:16,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:16,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:16,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374013959] [2021-06-05 05:02:16,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374013959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:16,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2622300] [2021-06-05 05:02:16,247 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 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 [2021-06-05 05:02:16,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:16,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:16,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:16,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2622300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:16,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:16,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:02:16,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978256546] [2021-06-05 05:02:16,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:16,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:16,612 INFO L87 Difference]: Start difference. First operand 246 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:17,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:17,021 INFO L93 Difference]: Finished difference Result 336 states and 787 transitions. [2021-06-05 05:02:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:02:17,022 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-06-05 05:02:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:17,022 INFO L225 Difference]: With dead ends: 336 [2021-06-05 05:02:17,022 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 05:02:17,022 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 498.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:02:17,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 05:02:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 238. [2021-06-05 05:02:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.5949367088607596) internal successors, (615), 237 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) [2021-06-05 05:02:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 615 transitions. [2021-06-05 05:02:17,025 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 615 transitions. Word has length 18 [2021-06-05 05:02:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:17,025 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 615 transitions. [2021-06-05 05:02:17,025 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 615 transitions. [2021-06-05 05:02:17,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:17,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:17,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:17,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10254 [2021-06-05 05:02:17,225 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -73397396, now seen corresponding path program 353 times [2021-06-05 05:02:17,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:17,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505916750] [2021-06-05 05:02:17,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:17,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505916750] [2021-06-05 05:02:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505916750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652625749] [2021-06-05 05:02:17,350 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 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 [2021-06-05 05:02:17,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:02:17,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:17,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:17,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:17,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652625749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:17,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:17,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:02:17,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111292149] [2021-06-05 05:02:17,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:17,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:17,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:17,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:17,765 INFO L87 Difference]: Start difference. First operand 238 states and 615 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) [2021-06-05 05:02:18,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:18,138 INFO L93 Difference]: Finished difference Result 356 states and 834 transitions. [2021-06-05 05:02:18,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:02:18,138 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 [2021-06-05 05:02:18,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:18,139 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:02:18,139 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 05:02:18,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 461.7ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:02:18,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 05:02:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 248. [2021-06-05 05:02:18,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.619433198380567) internal successors, (647), 247 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 647 transitions. [2021-06-05 05:02:18,142 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 647 transitions. Word has length 18 [2021-06-05 05:02:18,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:18,142 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 647 transitions. [2021-06-05 05:02:18,142 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) [2021-06-05 05:02:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 647 transitions. [2021-06-05 05:02:18,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:18,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:18,142 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:18,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10288 [2021-06-05 05:02:18,343 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:18,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:18,343 INFO L82 PathProgramCache]: Analyzing trace with hash -313843544, now seen corresponding path program 354 times [2021-06-05 05:02:18,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:18,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361024096] [2021-06-05 05:02:18,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:18,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:18,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:18,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361024096] [2021-06-05 05:02:18,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361024096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:18,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919430663] [2021-06-05 05:02:18,475 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 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 [2021-06-05 05:02:18,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:02:18,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:18,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:02:18,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:18,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919430663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:18,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:18,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:02:18,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123448458] [2021-06-05 05:02:18,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:18,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:18,879 INFO L87 Difference]: Start difference. First operand 248 states and 647 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) [2021-06-05 05:02:19,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:19,455 INFO L93 Difference]: Finished difference Result 372 states and 865 transitions. [2021-06-05 05:02:19,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:02:19,456 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 [2021-06-05 05:02:19,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:19,456 INFO L225 Difference]: With dead ends: 372 [2021-06-05 05:02:19,456 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 05:02:19,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 609.9ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:19,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 05:02:19,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 250. [2021-06-05 05:02:19,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.6265060240963853) internal successors, (654), 249 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:19,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 654 transitions. [2021-06-05 05:02:19,467 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 654 transitions. Word has length 18 [2021-06-05 05:02:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:19,467 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 654 transitions. [2021-06-05 05:02:19,467 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) [2021-06-05 05:02:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 654 transitions. [2021-06-05 05:02:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:19,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:19,468 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:19,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10370,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:19,676 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:19,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:19,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1014336532, now seen corresponding path program 355 times [2021-06-05 05:02:19,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:19,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531760788] [2021-06-05 05:02:19,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:19,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:19,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531760788] [2021-06-05 05:02:19,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531760788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:19,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167342728] [2021-06-05 05:02:19,966 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 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 [2021-06-05 05:02:19,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:19,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:20,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:20,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167342728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:20,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:20,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:02:20,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984404166] [2021-06-05 05:02:20,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:20,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:20,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:20,501 INFO L87 Difference]: Start difference. First operand 250 states and 654 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) [2021-06-05 05:02:21,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:21,562 INFO L93 Difference]: Finished difference Result 408 states and 928 transitions. [2021-06-05 05:02:21,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:02:21,563 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 18 [2021-06-05 05:02:21,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:21,563 INFO L225 Difference]: With dead ends: 408 [2021-06-05 05:02:21,563 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 05:02:21,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1130.6ms TimeCoverageRelationStatistics Valid=119, Invalid=937, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:02:21,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 05:02:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 251. [2021-06-05 05:02:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.632) internal successors, (658), 250 states have internal predecessors, (658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 658 transitions. [2021-06-05 05:02:21,566 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 658 transitions. Word has length 18 [2021-06-05 05:02:21,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:21,566 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 658 transitions. [2021-06-05 05:02:21,566 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) [2021-06-05 05:02:21,566 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 658 transitions. [2021-06-05 05:02:21,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:21,567 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:21,567 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:21,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10452 [2021-06-05 05:02:21,767 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:21,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:21,768 INFO L82 PathProgramCache]: Analyzing trace with hash 677248104, now seen corresponding path program 356 times [2021-06-05 05:02:21,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:21,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212255429] [2021-06-05 05:02:21,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:21,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:21,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:21,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212255429] [2021-06-05 05:02:21,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212255429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:21,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767211538] [2021-06-05 05:02:21,918 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 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 [2021-06-05 05:02:21,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:21,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:21,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:02:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:22,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,360 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 38 treesize of output 28 [2021-06-05 05:02:22,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,366 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 29 treesize of output 21 [2021-06-05 05:02:22,367 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,372 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 30 treesize of output 22 [2021-06-05 05:02:22,373 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,378 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,378 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 44 treesize of output 32 [2021-06-05 05:02:22,379 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,384 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 31 treesize of output 23 [2021-06-05 05:02:22,385 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,390 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,390 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 31 treesize of output 23 [2021-06-05 05:02:22,392 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,398 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 36 treesize of output 26 [2021-06-05 05:02:22,398 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,404 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,404 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 37 treesize of output 27 [2021-06-05 05:02:22,404 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,410 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 36 treesize of output 26 [2021-06-05 05:02:22,410 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,416 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 30 treesize of output 22 [2021-06-05 05:02:22,416 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,422 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 36 treesize of output 26 [2021-06-05 05:02:22,422 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,427 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 45 treesize of output 33 [2021-06-05 05:02:22,429 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,434 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 37 treesize of output 27 [2021-06-05 05:02:22,435 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,439 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,440 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,440 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 31 treesize of output 23 [2021-06-05 05:02:22,441 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,446 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 29 treesize of output 21 [2021-06-05 05:02:22,447 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:22,453 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,458 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 31 treesize of output 23 [2021-06-05 05:02:22,459 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,464 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 37 treesize of output 27 [2021-06-05 05:02:22,465 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,470 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 37 treesize of output 27 [2021-06-05 05:02:22,470 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,475 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 38 treesize of output 28 [2021-06-05 05:02:22,476 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,481 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 38 treesize of output 28 [2021-06-05 05:02:22,482 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:02:22,487 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,492 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,492 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 44 treesize of output 32 [2021-06-05 05:02:22,493 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,497 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,498 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,498 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 37 treesize of output 27 [2021-06-05 05:02:22,499 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,503 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 30 treesize of output 22 [2021-06-05 05:02:22,504 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,518 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 38 treesize of output 28 [2021-06-05 05:02:22,519 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,524 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 37 treesize of output 27 [2021-06-05 05:02:22,524 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,529 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 36 treesize of output 26 [2021-06-05 05:02:22,530 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,535 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 37 treesize of output 27 [2021-06-05 05:02:22,535 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,540 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 43 treesize of output 31 [2021-06-05 05:02:22,540 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,545 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 30 treesize of output 22 [2021-06-05 05:02:22,545 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,550 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 30 treesize of output 22 [2021-06-05 05:02:22,551 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,555 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 30 treesize of output 22 [2021-06-05 05:02:22,556 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,560 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,560 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 37 treesize of output 27 [2021-06-05 05:02:22,561 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:22,565 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 30 treesize of output 22 [2021-06-05 05:02:22,566 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,569 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:02:22,570 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:22,676 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2021-06-05 05:02:22,676 INFO L628 ElimStorePlain]: treesize reduction 668, result has 10.6 percent of original size [2021-06-05 05:02:22,676 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:02:22,677 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:02:22,677 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 3 variables, input treesize:2161, output treesize:55 [2021-06-05 05:02:22,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:22,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767211538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:22,840 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:22,840 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:02:22,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415465020] [2021-06-05 05:02:22,840 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:22,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:22,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:22,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:22,841 INFO L87 Difference]: Start difference. First operand 251 states and 658 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) [2021-06-05 05:02:23,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:23,920 INFO L93 Difference]: Finished difference Result 375 states and 877 transitions. [2021-06-05 05:02:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:02:23,921 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 18 [2021-06-05 05:02:23,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:23,921 INFO L225 Difference]: With dead ends: 375 [2021-06-05 05:02:23,921 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 05:02:23,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1106.2ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:02:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 05:02:23,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 230. [2021-06-05 05:02:23,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 2.593886462882096) internal successors, (594), 229 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 594 transitions. [2021-06-05 05:02:23,924 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 594 transitions. Word has length 18 [2021-06-05 05:02:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:23,924 INFO L482 AbstractCegarLoop]: Abstraction has 230 states and 594 transitions. [2021-06-05 05:02:23,924 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) [2021-06-05 05:02:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 594 transitions. [2021-06-05 05:02:23,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:23,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:23,924 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:24,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10599,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:24,125 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash -798291054, now seen corresponding path program 357 times [2021-06-05 05:02:24,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:24,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930130002] [2021-06-05 05:02:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:24,232 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:24,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:24,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930130002] [2021-06-05 05:02:24,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930130002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:24,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095310179] [2021-06-05 05:02:24,232 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 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 [2021-06-05 05:02:24,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:02:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:02:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:24,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,731 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 30 treesize of output 22 [2021-06-05 05:02:24,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,736 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 22 treesize of output 16 [2021-06-05 05:02:24,737 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,741 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 30 treesize of output 22 [2021-06-05 05:02:24,742 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,746 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 23 treesize of output 17 [2021-06-05 05:02:24,747 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:24,751 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,758 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 30 treesize of output 22 [2021-06-05 05:02:24,760 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,773 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,774 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 38 treesize of output 28 [2021-06-05 05:02:24,775 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,780 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 31 treesize of output 23 [2021-06-05 05:02:24,782 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,787 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 31 treesize of output 23 [2021-06-05 05:02:24,787 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,792 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 23 treesize of output 17 [2021-06-05 05:02:24,792 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,797 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 31 treesize of output 23 [2021-06-05 05:02:24,797 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:02:24,803 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:02:24,808 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,813 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 30 treesize of output 22 [2021-06-05 05:02:24,813 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,818 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 22 treesize of output 16 [2021-06-05 05:02:24,818 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,822 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 37 treesize of output 27 [2021-06-05 05:02:24,823 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:24,828 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:24,831 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 37 treesize of output 27 [2021-06-05 05:02:24,832 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:24,922 INFO L628 ElimStorePlain]: treesize reduction 384, result has 17.2 percent of original size [2021-06-05 05:02:24,922 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:02:24,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:02:24,924 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:1003, output treesize:86 [2021-06-05 05:02:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:25,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095310179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:25,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:25,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 05:02:25,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316253259] [2021-06-05 05:02:25,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:25,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:25,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:25,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:25,023 INFO L87 Difference]: Start difference. First operand 230 states and 594 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) [2021-06-05 05:02:25,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:25,428 INFO L93 Difference]: Finished difference Result 368 states and 863 transitions. [2021-06-05 05:02:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:02:25,428 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 18 [2021-06-05 05:02:25,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:25,428 INFO L225 Difference]: With dead ends: 368 [2021-06-05 05:02:25,429 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 05:02:25,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:02:25,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 05:02:25,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 252. [2021-06-05 05:02:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-06-05 05:02:25,431 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-06-05 05:02:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:25,431 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-06-05 05:02:25,431 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) [2021-06-05 05:02:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-06-05 05:02:25,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:25,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:25,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:25,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10707,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:25,632 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1498784042, now seen corresponding path program 358 times [2021-06-05 05:02:25,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:25,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407306777] [2021-06-05 05:02:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:25,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:25,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407306777] [2021-06-05 05:02:25,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407306777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:25,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283032584] [2021-06-05 05:02:25,733 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 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 [2021-06-05 05:02:25,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:25,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:25,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:26,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283032584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:26,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:26,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:02:26,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304507707] [2021-06-05 05:02:26,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:02:26,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:26,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:02:26,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:02:26,256 INFO L87 Difference]: Start difference. First operand 252 states and 664 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) [2021-06-05 05:02:26,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:26,585 INFO L93 Difference]: Finished difference Result 375 states and 874 transitions. [2021-06-05 05:02:26,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:02:26,585 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 18 [2021-06-05 05:02:26,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:26,586 INFO L225 Difference]: With dead ends: 375 [2021-06-05 05:02:26,586 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 05:02:26,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 05:02:26,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-06-05 05:02:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:26,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-06-05 05:02:26,588 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-06-05 05:02:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:26,588 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-06-05 05:02:26,588 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) [2021-06-05 05:02:26,589 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-06-05 05:02:26,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:26,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:26,589 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:26,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10832,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:26,789 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:26,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash 192800594, now seen corresponding path program 359 times [2021-06-05 05:02:26,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:26,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697043123] [2021-06-05 05:02:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:26,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:26,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697043123] [2021-06-05 05:02:26,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697043123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:26,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947299789] [2021-06-05 05:02:26,891 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 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 [2021-06-05 05:02:26,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:02:26,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:26,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:26,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:27,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947299789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:27,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:27,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:02:27,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272962546] [2021-06-05 05:02:27,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:02:27,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:27,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:02:27,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:02:27,366 INFO L87 Difference]: Start difference. First operand 253 states and 668 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) [2021-06-05 05:02:27,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:27,695 INFO L93 Difference]: Finished difference Result 360 states and 851 transitions. [2021-06-05 05:02:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:02:27,695 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 18 [2021-06-05 05:02:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:27,696 INFO L225 Difference]: With dead ends: 360 [2021-06-05 05:02:27,696 INFO L226 Difference]: Without dead ends: 353 [2021-06-05 05:02:27,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 299.7ms TimeCoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-06-05 05:02:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 250. [2021-06-05 05:02:27,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:27,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 05:02:27,698 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 05:02:27,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:27,698 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 05:02:27,698 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) [2021-06-05 05:02:27,699 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 05:02:27,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:27,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:27,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:27,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11004 [2021-06-05 05:02:27,899 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:27,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:27,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2034013844, now seen corresponding path program 360 times [2021-06-05 05:02:27,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:27,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156588346] [2021-06-05 05:02:27,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:27,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:28,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:28,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:28,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156588346] [2021-06-05 05:02:28,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156588346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:28,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070505928] [2021-06-05 05:02:28,008 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 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 [2021-06-05 05:02:28,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:02:28,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:28,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:28,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:28,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070505928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:28,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:28,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 16 [2021-06-05 05:02:28,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118091323] [2021-06-05 05:02:28,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:02:28,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:28,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:02:28,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:02:28,288 INFO L87 Difference]: Start difference. First operand 250 states and 657 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) [2021-06-05 05:02:28,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:28,692 INFO L93 Difference]: Finished difference Result 365 states and 851 transitions. [2021-06-05 05:02:28,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:02:28,692 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 18 [2021-06-05 05:02:28,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:28,693 INFO L225 Difference]: With dead ends: 365 [2021-06-05 05:02:28,693 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 05:02:28,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 451.1ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:02:28,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 05:02:28,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 253. [2021-06-05 05:02:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.6507936507936507) internal successors, (668), 252 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 668 transitions. [2021-06-05 05:02:28,695 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 668 transitions. Word has length 18 [2021-06-05 05:02:28,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:28,696 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 668 transitions. [2021-06-05 05:02:28,696 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) [2021-06-05 05:02:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 668 transitions. [2021-06-05 05:02:28,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:28,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:28,696 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:28,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11148 [2021-06-05 05:02:28,896 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash -342429208, now seen corresponding path program 361 times [2021-06-05 05:02:28,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:28,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938993658] [2021-06-05 05:02:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:29,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:29,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938993658] [2021-06-05 05:02:29,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938993658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:29,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181689784] [2021-06-05 05:02:29,030 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 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 [2021-06-05 05:02:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:29,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:29,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:29,328 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:29,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181689784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:29,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:29,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 17 [2021-06-05 05:02:29,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892366979] [2021-06-05 05:02:29,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:29,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:29,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:29,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:29,328 INFO L87 Difference]: Start difference. First operand 253 states and 668 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:29,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:29,778 INFO L93 Difference]: Finished difference Result 366 states and 851 transitions. [2021-06-05 05:02:29,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:02:29,778 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:02:29,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:29,778 INFO L225 Difference]: With dead ends: 366 [2021-06-05 05:02:29,778 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 05:02:29,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 523.1ms TimeCoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:02:29,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 05:02:29,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 252. [2021-06-05 05:02:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.645418326693227) internal successors, (664), 251 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:29,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 664 transitions. [2021-06-05 05:02:29,781 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 664 transitions. Word has length 18 [2021-06-05 05:02:29,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:29,781 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 664 transitions. [2021-06-05 05:02:29,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:29,781 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 664 transitions. [2021-06-05 05:02:29,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:29,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:29,782 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:29,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11184,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:29,982 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:29,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:29,982 INFO L82 PathProgramCache]: Analyzing trace with hash -169181516, now seen corresponding path program 362 times [2021-06-05 05:02:29,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:29,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137664135] [2021-06-05 05:02:29,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:30,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:30,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:30,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137664135] [2021-06-05 05:02:30,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137664135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:30,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528722832] [2021-06-05 05:02:30,087 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 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 [2021-06-05 05:02:30,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:30,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:02:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:30,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,597 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 22 treesize of output 16 [2021-06-05 05:02:30,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,605 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 22 treesize of output 16 [2021-06-05 05:02:30,605 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,612 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 23 treesize of output 17 [2021-06-05 05:02:30,613 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,619 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 30 treesize of output 22 [2021-06-05 05:02:30,620 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,626 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 23 treesize of output 17 [2021-06-05 05:02:30,627 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:30,634 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,831 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 05:02:30,831 INFO L628 ElimStorePlain]: treesize reduction 915, result has 11.9 percent of original size [2021-06-05 05:02:30,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:30,835 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 16 treesize of output 12 [2021-06-05 05:02:30,836 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,875 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:30,875 INFO L518 ElimStorePlain]: Eliminatee v_prenex_282 vanished before elimination [2021-06-05 05:02:30,875 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:02:30,878 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 [2021-06-05 05:02:30,879 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:30,917 INFO L518 ElimStorePlain]: Eliminatee v_prenex_284 vanished before elimination [2021-06-05 05:02:30,919 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 7 treesize of output 5 [2021-06-05 05:02:30,924 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:30,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:30,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_286 vanished before elimination [2021-06-05 05:02:30,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:02:30,962 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:02:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:31,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528722832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:31,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:31,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 18 [2021-06-05 05:02:31,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215778547] [2021-06-05 05:02:31,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:31,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:31,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:31,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:31,060 INFO L87 Difference]: Start difference. First operand 252 states and 664 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) [2021-06-05 05:02:31,469 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 83 [2021-06-05 05:02:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:31,688 INFO L93 Difference]: Finished difference Result 358 states and 837 transitions. [2021-06-05 05:02:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:31,689 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 [2021-06-05 05:02:31,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:31,689 INFO L225 Difference]: With dead ends: 358 [2021-06-05 05:02:31,689 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 05:02:31,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 880.1ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:31,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 05:02:31,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 250. [2021-06-05 05:02:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:31,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 05:02:31,692 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 05:02:31,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:31,692 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 05:02:31,692 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) [2021-06-05 05:02:31,692 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 05:02:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:31,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:31,693 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:31,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11221 [2021-06-05 05:02:31,897 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:31,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:31,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1446268522, now seen corresponding path program 363 times [2021-06-05 05:02:31,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:31,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895117784] [2021-06-05 05:02:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:32,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:32,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895117784] [2021-06-05 05:02:32,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895117784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985098545] [2021-06-05 05:02:32,092 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 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 [2021-06-05 05:02:32,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:02:32,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:32,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:32,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:32,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985098545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:32,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:32,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:02:32,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188956452] [2021-06-05 05:02:32,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:32,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:32,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:32,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:32,411 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:02:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:32,939 INFO L93 Difference]: Finished difference Result 323 states and 775 transitions. [2021-06-05 05:02:32,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:02:32,939 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:02:32,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:32,940 INFO L225 Difference]: With dead ends: 323 [2021-06-05 05:02:32,940 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 05:02:32,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:32,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 05:02:32,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 250. [2021-06-05 05:02:32,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.63855421686747) internal successors, (657), 249 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 657 transitions. [2021-06-05 05:02:32,943 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 657 transitions. Word has length 18 [2021-06-05 05:02:32,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:32,943 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 657 transitions. [2021-06-05 05:02:32,943 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:02:32,943 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 657 transitions. [2021-06-05 05:02:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:32,943 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:32,943 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:33,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11268 [2021-06-05 05:02:33,149 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:33,149 INFO L82 PathProgramCache]: Analyzing trace with hash 245316114, now seen corresponding path program 364 times [2021-06-05 05:02:33,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:33,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105179142] [2021-06-05 05:02:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:33,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:33,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:33,318 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:33,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105179142] [2021-06-05 05:02:33,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105179142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:33,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939074054] [2021-06-05 05:02:33,318 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 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 [2021-06-05 05:02:33,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:33,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:33,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:33,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:33,696 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:33,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939074054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:33,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:33,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:02:33,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655521169] [2021-06-05 05:02:33,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:33,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:33,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:33,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:33,697 INFO L87 Difference]: Start difference. First operand 250 states and 657 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:02:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:34,157 INFO L93 Difference]: Finished difference Result 324 states and 775 transitions. [2021-06-05 05:02:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:02:34,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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 18 [2021-06-05 05:02:34,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:34,158 INFO L225 Difference]: With dead ends: 324 [2021-06-05 05:02:34,158 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 05:02:34,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:34,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 05:02:34,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 249. [2021-06-05 05:02:34,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.6330645161290325) internal successors, (653), 248 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:34,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 653 transitions. [2021-06-05 05:02:34,161 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 653 transitions. Word has length 18 [2021-06-05 05:02:34,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:34,161 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 653 transitions. [2021-06-05 05:02:34,161 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 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) [2021-06-05 05:02:34,161 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 653 transitions. [2021-06-05 05:02:34,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:34,161 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:34,161 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:34,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11303 [2021-06-05 05:02:34,362 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:34,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:34,362 INFO L82 PathProgramCache]: Analyzing trace with hash 418563806, now seen corresponding path program 365 times [2021-06-05 05:02:34,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:34,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196372448] [2021-06-05 05:02:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:34,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:34,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:34,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196372448] [2021-06-05 05:02:34,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196372448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:34,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132013862] [2021-06-05 05:02:34,585 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 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 [2021-06-05 05:02:34,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:02:34,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:34,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:34,963 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:34,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132013862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:34,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:34,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:02:34,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340535646] [2021-06-05 05:02:34,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:34,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:34,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:34,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:34,964 INFO L87 Difference]: Start difference. First operand 249 states and 653 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2021-06-05 05:02:35,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:35,637 INFO L93 Difference]: Finished difference Result 340 states and 797 transitions. [2021-06-05 05:02:35,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:02:35,637 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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 [2021-06-05 05:02:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:35,637 INFO L225 Difference]: With dead ends: 340 [2021-06-05 05:02:35,638 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 05:02:35,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 853.8ms TimeCoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:02:35,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 05:02:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 247. [2021-06-05 05:02:35,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.6260162601626016) internal successors, (646), 246 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:35,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 646 transitions. [2021-06-05 05:02:35,640 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 646 transitions. Word has length 18 [2021-06-05 05:02:35,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:35,640 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 646 transitions. [2021-06-05 05:02:35,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 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) [2021-06-05 05:02:35,640 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 646 transitions. [2021-06-05 05:02:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:35,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:35,641 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:35,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11338,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:35,841 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:35,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:35,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1494274962, now seen corresponding path program 366 times [2021-06-05 05:02:35,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:35,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692478170] [2021-06-05 05:02:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:35,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:35,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:02:35,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:35,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692478170] [2021-06-05 05:02:35,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692478170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:35,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611297337] [2021-06-05 05:02:35,968 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 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 [2021-06-05 05:02:35,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:02:35,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:35,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:02:35,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:36,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:36,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:36,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:36,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:36,516 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 23 treesize of output 17 [2021-06-05 05:02:36,516 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,523 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:02:36,523 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:36,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:36,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:02:36,532 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,538 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:02:36,538 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:36,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:02:36,548 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,748 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2021-06-05 05:02:36,749 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-06-05 05:02:36,749 INFO L518 ElimStorePlain]: Eliminatee v_prenex_306 vanished before elimination [2021-06-05 05:02:36,752 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 [2021-06-05 05:02:36,753 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:36,801 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:02:36,804 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 16 treesize of output 12 [2021-06-05 05:02:36,805 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:36,842 INFO L518 ElimStorePlain]: Eliminatee v_prenex_302 vanished before elimination [2021-06-05 05:02:36,845 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 [2021-06-05 05:02:36,846 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:36,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:36,882 INFO L518 ElimStorePlain]: Eliminatee v_prenex_304 vanished before elimination [2021-06-05 05:02:36,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:02:36,884 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:02:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:36,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611297337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:36,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:36,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:02:36,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355394223] [2021-06-05 05:02:36,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:36,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:36,988 INFO L87 Difference]: Start difference. First operand 247 states and 646 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) [2021-06-05 05:02:37,434 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 05:02:37,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:37,775 INFO L93 Difference]: Finished difference Result 332 states and 780 transitions. [2021-06-05 05:02:37,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:37,775 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 18 [2021-06-05 05:02:37,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:37,775 INFO L225 Difference]: With dead ends: 332 [2021-06-05 05:02:37,775 INFO L226 Difference]: Without dead ends: 318 [2021-06-05 05:02:37,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1009.7ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:02:37,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2021-06-05 05:02:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 244. [2021-06-05 05:02:37,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.617283950617284) internal successors, (636), 243 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) [2021-06-05 05:02:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 636 transitions. [2021-06-05 05:02:37,778 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 636 transitions. Word has length 18 [2021-06-05 05:02:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:37,778 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 636 transitions. [2021-06-05 05:02:37,778 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) [2021-06-05 05:02:37,778 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 636 transitions. [2021-06-05 05:02:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:37,779 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:37,779 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:37,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11375 [2021-06-05 05:02:37,979 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:37,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:37,979 INFO L82 PathProgramCache]: Analyzing trace with hash -406032724, now seen corresponding path program 367 times [2021-06-05 05:02:37,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:37,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300893579] [2021-06-05 05:02:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:37,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:38,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:38,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:38,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300893579] [2021-06-05 05:02:38,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300893579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:38,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554175300] [2021-06-05 05:02:38,134 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 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 [2021-06-05 05:02:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:38,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:38,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:38,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554175300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:38,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:38,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:02:38,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957835816] [2021-06-05 05:02:38,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:38,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:38,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:38,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:38,500 INFO L87 Difference]: Start difference. First operand 244 states and 636 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:02:39,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:39,046 INFO L93 Difference]: Finished difference Result 371 states and 856 transitions. [2021-06-05 05:02:39,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:39,046 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:02:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:39,047 INFO L225 Difference]: With dead ends: 371 [2021-06-05 05:02:39,047 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 05:02:39,047 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 589.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:02:39,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 05:02:39,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 254. [2021-06-05 05:02:39,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.6482213438735176) internal successors, (670), 253 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:39,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 670 transitions. [2021-06-05 05:02:39,050 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 670 transitions. Word has length 18 [2021-06-05 05:02:39,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:39,050 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 670 transitions. [2021-06-05 05:02:39,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:02:39,050 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 670 transitions. [2021-06-05 05:02:39,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:39,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:39,050 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:39,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11421 [2021-06-05 05:02:39,266 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:39,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:39,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1285551912, now seen corresponding path program 368 times [2021-06-05 05:02:39,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:39,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882511390] [2021-06-05 05:02:39,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:39,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:39,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882511390] [2021-06-05 05:02:39,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882511390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:39,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081779268] [2021-06-05 05:02:39,425 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 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 [2021-06-05 05:02:39,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:39,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:39,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:39,802 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:39,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081779268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:39,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:39,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:02:39,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199114340] [2021-06-05 05:02:39,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:39,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:39,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:39,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:39,802 INFO L87 Difference]: Start difference. First operand 254 states and 670 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) [2021-06-05 05:02:40,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:40,342 INFO L93 Difference]: Finished difference Result 375 states and 861 transitions. [2021-06-05 05:02:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:40,342 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 18 [2021-06-05 05:02:40,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:40,343 INFO L225 Difference]: With dead ends: 375 [2021-06-05 05:02:40,343 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 05:02:40,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 621.1ms TimeCoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:40,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 05:02:40,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 253. [2021-06-05 05:02:40,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.642857142857143) internal successors, (666), 252 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:40,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 666 transitions. [2021-06-05 05:02:40,346 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 666 transitions. Word has length 18 [2021-06-05 05:02:40,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:40,346 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 666 transitions. [2021-06-05 05:02:40,346 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) [2021-06-05 05:02:40,346 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 666 transitions. [2021-06-05 05:02:40,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:40,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:40,346 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:40,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11455 [2021-06-05 05:02:40,547 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:40,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:40,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1458799604, now seen corresponding path program 369 times [2021-06-05 05:02:40,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:40,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075674218] [2021-06-05 05:02:40,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:40,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:40,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:40,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:40,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075674218] [2021-06-05 05:02:40,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075674218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:40,755 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18812652] [2021-06-05 05:02:40,755 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 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 [2021-06-05 05:02:40,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:02:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:40,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:41,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:41,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18812652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:41,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:41,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:02:41,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670476699] [2021-06-05 05:02:41,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:02:41,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:41,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:02:41,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:02:41,187 INFO L87 Difference]: Start difference. First operand 253 states and 666 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) [2021-06-05 05:02:41,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:41,794 INFO L93 Difference]: Finished difference Result 386 states and 873 transitions. [2021-06-05 05:02:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:02:41,795 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 18 [2021-06-05 05:02:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:41,795 INFO L225 Difference]: With dead ends: 386 [2021-06-05 05:02:41,795 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 05:02:41,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 788.0ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:02:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 05:02:41,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 249. [2021-06-05 05:02:41,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.629032258064516) internal successors, (652), 248 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 652 transitions. [2021-06-05 05:02:41,798 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 652 transitions. Word has length 18 [2021-06-05 05:02:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:41,798 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 652 transitions. [2021-06-05 05:02:41,798 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) [2021-06-05 05:02:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 652 transitions. [2021-06-05 05:02:41,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:41,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:41,798 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:41,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11490 [2021-06-05 05:02:41,999 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:41,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:41,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1760456536, now seen corresponding path program 370 times [2021-06-05 05:02:41,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:41,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605031056] [2021-06-05 05:02:41,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:42,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:42,439 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605031056] [2021-06-05 05:02:42,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605031056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:42,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179756462] [2021-06-05 05:02:42,439 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 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 [2021-06-05 05:02:42,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:42,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:42,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:42,927 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:42,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179756462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:42,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:42,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:02:42,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023374666] [2021-06-05 05:02:42,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:02:42,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:42,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:02:42,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:02:42,928 INFO L87 Difference]: Start difference. First operand 249 states and 652 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) [2021-06-05 05:02:43,485 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 85 [2021-06-05 05:02:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:43,672 INFO L93 Difference]: Finished difference Result 269 states and 682 transitions. [2021-06-05 05:02:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:02:43,672 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 [2021-06-05 05:02:43,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:43,672 INFO L225 Difference]: With dead ends: 269 [2021-06-05 05:02:43,673 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 05:02:43,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1166.9ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:02:43,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 05:02:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-06-05 05:02:43,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6275303643724697) internal successors, (649), 247 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:43,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 649 transitions. [2021-06-05 05:02:43,675 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 649 transitions. Word has length 18 [2021-06-05 05:02:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:43,675 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 649 transitions. [2021-06-05 05:02:43,675 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) [2021-06-05 05:02:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 649 transitions. [2021-06-05 05:02:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:43,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:43,675 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:43,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11525 [2021-06-05 05:02:43,890 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:43,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:43,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1521818228, now seen corresponding path program 371 times [2021-06-05 05:02:43,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:43,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63162260] [2021-06-05 05:02:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:43,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:44,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:44,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63162260] [2021-06-05 05:02:44,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63162260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:44,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898426109] [2021-06-05 05:02:44,087 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 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 [2021-06-05 05:02:44,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:02:44,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:44,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898426109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:44,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:44,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:02:44,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238193289] [2021-06-05 05:02:44,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:44,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:44,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:44,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:44,499 INFO L87 Difference]: Start difference. First operand 248 states and 649 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:02:44,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:44,904 INFO L93 Difference]: Finished difference Result 347 states and 801 transitions. [2021-06-05 05:02:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:44,905 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 18 [2021-06-05 05:02:44,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:44,905 INFO L225 Difference]: With dead ends: 347 [2021-06-05 05:02:44,905 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 05:02:44,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:02:44,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 05:02:44,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 227. [2021-06-05 05:02:44,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.601769911504425) internal successors, (588), 226 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) [2021-06-05 05:02:44,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 588 transitions. [2021-06-05 05:02:44,908 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 588 transitions. Word has length 18 [2021-06-05 05:02:44,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:44,908 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 588 transitions. [2021-06-05 05:02:44,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:02:44,908 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 588 transitions. [2021-06-05 05:02:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:44,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:44,909 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:45,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 375 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11573 [2021-06-05 05:02:45,117 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:45,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1148383108, now seen corresponding path program 372 times [2021-06-05 05:02:45,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:45,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890965636] [2021-06-05 05:02:45,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:45,268 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:45,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:45,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890965636] [2021-06-05 05:02:45,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890965636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:45,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790919635] [2021-06-05 05:02:45,268 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 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 [2021-06-05 05:02:45,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:02:45,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:45,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:02:45,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:45,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790919635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:45,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:45,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:02:45,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004836107] [2021-06-05 05:02:45,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:45,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:45,698 INFO L87 Difference]: Start difference. First operand 227 states and 588 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:46,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:46,104 INFO L93 Difference]: Finished difference Result 398 states and 930 transitions. [2021-06-05 05:02:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:02:46,105 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-06-05 05:02:46,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:46,105 INFO L225 Difference]: With dead ends: 398 [2021-06-05 05:02:46,105 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 05:02:46,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:02:46,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 05:02:46,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 237. [2021-06-05 05:02:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.6271186440677967) internal successors, (620), 236 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 620 transitions. [2021-06-05 05:02:46,108 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 620 transitions. Word has length 18 [2021-06-05 05:02:46,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:46,108 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 620 transitions. [2021-06-05 05:02:46,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:46,108 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 620 transitions. [2021-06-05 05:02:46,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:46,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:46,109 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:46,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11607,376 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:46,309 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:46,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:46,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1388829256, now seen corresponding path program 373 times [2021-06-05 05:02:46,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:46,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261916843] [2021-06-05 05:02:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:46,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:46,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:46,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261916843] [2021-06-05 05:02:46,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261916843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:46,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455664563] [2021-06-05 05:02:46,579 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 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 [2021-06-05 05:02:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:46,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:46,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:46,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455664563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:46,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:46,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:02:46,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937364194] [2021-06-05 05:02:46,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:46,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:47,000 INFO L87 Difference]: Start difference. First operand 237 states and 620 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) [2021-06-05 05:02:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:47,678 INFO L93 Difference]: Finished difference Result 426 states and 984 transitions. [2021-06-05 05:02:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:02:47,678 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 18 [2021-06-05 05:02:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:47,678 INFO L225 Difference]: With dead ends: 426 [2021-06-05 05:02:47,678 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 05:02:47,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 793.4ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:02:47,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 05:02:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 239. [2021-06-05 05:02:47,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.634453781512605) internal successors, (627), 238 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 627 transitions. [2021-06-05 05:02:47,681 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 627 transitions. Word has length 18 [2021-06-05 05:02:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:47,681 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 627 transitions. [2021-06-05 05:02:47,682 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) [2021-06-05 05:02:47,682 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 627 transitions. [2021-06-05 05:02:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:47,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:47,682 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:47,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11703,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:47,882 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:47,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:47,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2089322244, now seen corresponding path program 374 times [2021-06-05 05:02:47,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:47,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889620549] [2021-06-05 05:02:47,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:48,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889620549] [2021-06-05 05:02:48,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889620549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427629319] [2021-06-05 05:02:48,022 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 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 [2021-06-05 05:02:48,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:48,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:48,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:48,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:48,497 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:48,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427629319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:48,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:48,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:02:48,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978308100] [2021-06-05 05:02:48,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:48,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:48,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:48,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:48,498 INFO L87 Difference]: Start difference. First operand 239 states and 627 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:02:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:49,176 INFO L93 Difference]: Finished difference Result 439 states and 1007 transitions. [2021-06-05 05:02:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:02:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:02:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:49,176 INFO L225 Difference]: With dead ends: 439 [2021-06-05 05:02:49,177 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 05:02:49,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 606.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:02:49,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 05:02:49,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 241. [2021-06-05 05:02:49,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6458333333333335) internal successors, (635), 240 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 635 transitions. [2021-06-05 05:02:49,179 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 635 transitions. Word has length 18 [2021-06-05 05:02:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:49,179 INFO L482 AbstractCegarLoop]: Abstraction has 241 states and 635 transitions. [2021-06-05 05:02:49,180 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:02:49,180 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 635 transitions. [2021-06-05 05:02:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:49,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:49,180 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:49,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11793 [2021-06-05 05:02:49,380 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash -397737608, now seen corresponding path program 375 times [2021-06-05 05:02:49,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:49,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630264515] [2021-06-05 05:02:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:49,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:49,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:49,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630264515] [2021-06-05 05:02:49,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630264515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:49,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004865667] [2021-06-05 05:02:49,517 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 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 [2021-06-05 05:02:49,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:02:49,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:49,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:49,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:50,019 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:50,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004865667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:50,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:50,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:02:50,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162470603] [2021-06-05 05:02:50,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:50,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:50,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:50,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:50,019 INFO L87 Difference]: Start difference. First operand 241 states and 635 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:02:50,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:50,643 INFO L93 Difference]: Finished difference Result 409 states and 961 transitions. [2021-06-05 05:02:50,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:02:50,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:02:50,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:50,644 INFO L225 Difference]: With dead ends: 409 [2021-06-05 05:02:50,644 INFO L226 Difference]: Without dead ends: 395 [2021-06-05 05:02:50,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 613.3ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:02:50,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2021-06-05 05:02:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 235. [2021-06-05 05:02:50,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 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) [2021-06-05 05:02:50,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-06-05 05:02:50,647 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-06-05 05:02:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:50,647 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-06-05 05:02:50,647 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:02:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-06-05 05:02:50,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:50,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:50,647 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:50,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11933,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:50,847 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:50,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:50,848 INFO L82 PathProgramCache]: Analyzing trace with hash -2036806724, now seen corresponding path program 376 times [2021-06-05 05:02:50,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:50,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265154190] [2021-06-05 05:02:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:50,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:51,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:51,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265154190] [2021-06-05 05:02:51,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265154190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:51,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373572202] [2021-06-05 05:02:51,034 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 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 [2021-06-05 05:02:51,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:51,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:51,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:51,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:51,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:51,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373572202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:51,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:51,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:02:51,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170688230] [2021-06-05 05:02:51,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:51,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:51,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:51,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:51,331 INFO L87 Difference]: Start difference. First operand 235 states and 614 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) [2021-06-05 05:02:51,929 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-06-05 05:02:51,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:51,946 INFO L93 Difference]: Finished difference Result 341 states and 817 transitions. [2021-06-05 05:02:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:51,946 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 18 [2021-06-05 05:02:51,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:51,947 INFO L225 Difference]: With dead ends: 341 [2021-06-05 05:02:51,947 INFO L226 Difference]: Without dead ends: 334 [2021-06-05 05:02:51,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 692.4ms TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:02:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-06-05 05:02:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 235. [2021-06-05 05:02:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.623931623931624) internal successors, (614), 234 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) [2021-06-05 05:02:51,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 614 transitions. [2021-06-05 05:02:51,949 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 614 transitions. Word has length 18 [2021-06-05 05:02:51,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:51,949 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 614 transitions. [2021-06-05 05:02:51,949 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) [2021-06-05 05:02:51,949 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 614 transitions. [2021-06-05 05:02:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:51,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:51,950 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:52,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12086,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:52,150 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash -345222088, now seen corresponding path program 377 times [2021-06-05 05:02:52,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:52,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459232113] [2021-06-05 05:02:52,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:52,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:52,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459232113] [2021-06-05 05:02:52,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459232113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:52,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097914994] [2021-06-05 05:02:52,328 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 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 [2021-06-05 05:02:52,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:02:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:52,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:52,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:52,633 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:52,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097914994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:52,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:52,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:02:52,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412687334] [2021-06-05 05:02:52,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:52,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:52,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:52,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:52,634 INFO L87 Difference]: Start difference. First operand 235 states and 614 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:53,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:53,392 INFO L93 Difference]: Finished difference Result 342 states and 817 transitions. [2021-06-05 05:02:53,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:02:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:02:53,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:53,393 INFO L225 Difference]: With dead ends: 342 [2021-06-05 05:02:53,393 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 05:02:53,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 788.8ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:53,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 05:02:53,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 234. [2021-06-05 05:02:53,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 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) [2021-06-05 05:02:53,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-06-05 05:02:53,396 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-06-05 05:02:53,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:53,396 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-06-05 05:02:53,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:53,396 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-06-05 05:02:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:53,396 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:53,396 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:53,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12122,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:53,596 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:53,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:53,597 INFO L82 PathProgramCache]: Analyzing trace with hash -171974396, now seen corresponding path program 378 times [2021-06-05 05:02:53,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:53,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491488989] [2021-06-05 05:02:53,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:53,709 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:53,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491488989] [2021-06-05 05:02:53,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491488989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:53,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310503613] [2021-06-05 05:02:53,709 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 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 [2021-06-05 05:02:53,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:02:53,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:53,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:02:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:54,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,195 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 23 treesize of output 17 [2021-06-05 05:02:54,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,202 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,203 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 23 treesize of output 17 [2021-06-05 05:02:54,203 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-06-05 05:02:54,211 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,217 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 22 treesize of output 16 [2021-06-05 05:02:54,218 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,224 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 22 treesize of output 16 [2021-06-05 05:02:54,225 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:02:54,231 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 30 treesize of output 22 [2021-06-05 05:02:54,231 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,421 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 63 [2021-06-05 05:02:54,422 INFO L628 ElimStorePlain]: treesize reduction 919, result has 11.9 percent of original size [2021-06-05 05:02:54,422 INFO L518 ElimStorePlain]: Eliminatee v_prenex_328 vanished before elimination [2021-06-05 05:02:54,425 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 [2021-06-05 05:02:54,426 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:54,470 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 16 treesize of output 12 [2021-06-05 05:02:54,471 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,508 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:54,508 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:02:54,508 INFO L518 ElimStorePlain]: Eliminatee v_prenex_330 vanished before elimination [2021-06-05 05:02:54,511 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 [2021-06-05 05:02:54,511 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:02:54,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:02:54,547 INFO L518 ElimStorePlain]: Eliminatee v_prenex_326 vanished before elimination [2021-06-05 05:02:54,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:02:54,549 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:02:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:54,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310503613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:54,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:54,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:02:54,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497160385] [2021-06-05 05:02:54,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:54,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:54,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:54,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:54,649 INFO L87 Difference]: Start difference. First operand 234 states and 610 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:55,070 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 84 [2021-06-05 05:02:55,208 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 36 [2021-06-05 05:02:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:55,437 INFO L93 Difference]: Finished difference Result 335 states and 802 transitions. [2021-06-05 05:02:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:02:55,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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 18 [2021-06-05 05:02:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:55,438 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:02:55,438 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:02:55,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:02:55,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:02:55,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 234. [2021-06-05 05:02:55,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6180257510729614) internal successors, (610), 233 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) [2021-06-05 05:02:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 610 transitions. [2021-06-05 05:02:55,441 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 610 transitions. Word has length 18 [2021-06-05 05:02:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:55,441 INFO L482 AbstractCegarLoop]: Abstraction has 234 states and 610 transitions. [2021-06-05 05:02:55,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 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) [2021-06-05 05:02:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 610 transitions. [2021-06-05 05:02:55,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:55,441 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:55,441 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:55,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 382 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12157 [2021-06-05 05:02:55,649 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash -408825604, now seen corresponding path program 379 times [2021-06-05 05:02:55,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:55,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182394005] [2021-06-05 05:02:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:55,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:55,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:55,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182394005] [2021-06-05 05:02:55,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182394005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:55,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112539584] [2021-06-05 05:02:55,971 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 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 [2021-06-05 05:02:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:56,348 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:56,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112539584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:56,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:56,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:02:56,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966037232] [2021-06-05 05:02:56,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:02:56,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:56,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:02:56,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:02:56,349 INFO L87 Difference]: Start difference. First operand 234 states and 610 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) [2021-06-05 05:02:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:57,114 INFO L93 Difference]: Finished difference Result 387 states and 901 transitions. [2021-06-05 05:02:57,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:02:57,114 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 18 [2021-06-05 05:02:57,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:57,114 INFO L225 Difference]: With dead ends: 387 [2021-06-05 05:02:57,114 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 05:02:57,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 979.7ms TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:02:57,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 05:02:57,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 244. [2021-06-05 05:02:57,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 243 states have (on average 2.6502057613168724) internal successors, (644), 243 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:57,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 644 transitions. [2021-06-05 05:02:57,117 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 644 transitions. Word has length 18 [2021-06-05 05:02:57,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:57,117 INFO L482 AbstractCegarLoop]: Abstraction has 244 states and 644 transitions. [2021-06-05 05:02:57,117 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) [2021-06-05 05:02:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 644 transitions. [2021-06-05 05:02:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:57,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:57,118 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:57,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12203 [2021-06-05 05:02:57,318 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1282759032, now seen corresponding path program 380 times [2021-06-05 05:02:57,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:57,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598261299] [2021-06-05 05:02:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:57,456 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:57,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:57,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598261299] [2021-06-05 05:02:57,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598261299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:57,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636185145] [2021-06-05 05:02:57,457 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 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 [2021-06-05 05:02:57,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:02:57,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:57,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:57,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:57,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636185145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:57,761 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:57,761 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2021-06-05 05:02:57,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204538377] [2021-06-05 05:02:57,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:02:57,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:57,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:02:57,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:02:57,761 INFO L87 Difference]: Start difference. First operand 244 states and 644 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:02:58,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:58,241 INFO L93 Difference]: Finished difference Result 364 states and 858 transitions. [2021-06-05 05:02:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:02:58,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:02:58,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:58,242 INFO L225 Difference]: With dead ends: 364 [2021-06-05 05:02:58,242 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 05:02:58,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 536.0ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:02:58,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 05:02:58,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 243. [2021-06-05 05:02:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.644628099173554) internal successors, (640), 242 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) [2021-06-05 05:02:58,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 640 transitions. [2021-06-05 05:02:58,245 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 640 transitions. Word has length 18 [2021-06-05 05:02:58,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:58,245 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 640 transitions. [2021-06-05 05:02:58,245 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:02:58,245 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 640 transitions. [2021-06-05 05:02:58,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:58,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:58,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:58,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12237 [2021-06-05 05:02:58,446 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:58,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:58,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1456006724, now seen corresponding path program 381 times [2021-06-05 05:02:58,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:58,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679332688] [2021-06-05 05:02:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:58,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:58,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:58,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679332688] [2021-06-05 05:02:58,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679332688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:58,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850611373] [2021-06-05 05:02:58,590 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 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 [2021-06-05 05:02:58,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:02:58,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:58,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:58,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:02:58,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:58,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850611373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:58,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:02:58,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:02:58,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970104957] [2021-06-05 05:02:58,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:02:58,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:02:58,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:02:58,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:02:58,949 INFO L87 Difference]: Start difference. First operand 243 states and 640 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:59,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:02:59,497 INFO L93 Difference]: Finished difference Result 361 states and 849 transitions. [2021-06-05 05:02:59,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:02:59,498 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:02:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:02:59,498 INFO L225 Difference]: With dead ends: 361 [2021-06-05 05:02:59,498 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 05:02:59,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 661.0ms TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:02:59,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 05:02:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 239. [2021-06-05 05:02:59,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.630252100840336) internal successors, (626), 238 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) [2021-06-05 05:02:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 626 transitions. [2021-06-05 05:02:59,501 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 626 transitions. Word has length 18 [2021-06-05 05:02:59,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:02:59,501 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 626 transitions. [2021-06-05 05:02:59,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:02:59,501 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 626 transitions. [2021-06-05 05:02:59,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:02:59,501 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:02:59,501 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:02:59,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12271,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:02:59,712 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:02:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:02:59,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1763249416, now seen corresponding path program 382 times [2021-06-05 05:02:59,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:02:59,712 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134881166] [2021-06-05 05:02:59,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:02:59,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:02:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:02:59,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:02:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134881166] [2021-06-05 05:02:59,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134881166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:02:59,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209931605] [2021-06-05 05:02:59,950 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 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 [2021-06-05 05:02:59,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:02:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:02:59,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:02:59,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:00,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209931605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:00,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:00,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:03:00,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460265784] [2021-06-05 05:03:00,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:00,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:00,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:00,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:00,311 INFO L87 Difference]: Start difference. First operand 239 states and 626 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:00,580 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 05:03:00,784 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 62 [2021-06-05 05:03:01,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:01,012 INFO L93 Difference]: Finished difference Result 333 states and 794 transitions. [2021-06-05 05:03:01,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:01,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:03:01,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:01,012 INFO L225 Difference]: With dead ends: 333 [2021-06-05 05:03:01,013 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 05:03:01,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 837.8ms TimeCoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:03:01,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 05:03:01,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 238. [2021-06-05 05:03:01,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.628691983122363) internal successors, (623), 237 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 623 transitions. [2021-06-05 05:03:01,015 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 623 transitions. Word has length 18 [2021-06-05 05:03:01,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:01,015 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 623 transitions. [2021-06-05 05:03:01,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:01,015 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 623 transitions. [2021-06-05 05:03:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:01,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:01,015 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:01,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12305 [2021-06-05 05:03:01,216 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:01,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1873276766, now seen corresponding path program 383 times [2021-06-05 05:03:01,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:01,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446005715] [2021-06-05 05:03:01,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:01,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:01,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:01,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446005715] [2021-06-05 05:03:01,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446005715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:01,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218244701] [2021-06-05 05:03:01,409 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 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 [2021-06-05 05:03:01,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:03:01,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:01,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:01,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:01,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:01,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218244701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:01,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:01,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:03:01,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571574254] [2021-06-05 05:03:01,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:01,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:01,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:01,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:01,795 INFO L87 Difference]: Start difference. First operand 238 states and 623 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) [2021-06-05 05:03:02,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:02,533 INFO L93 Difference]: Finished difference Result 385 states and 922 transitions. [2021-06-05 05:03:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:03:02,533 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 18 [2021-06-05 05:03:02,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:02,533 INFO L225 Difference]: With dead ends: 385 [2021-06-05 05:03:02,533 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 05:03:02,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 768.7ms TimeCoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:03:02,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 05:03:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 281. [2021-06-05 05:03:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.6714285714285713) internal successors, (748), 280 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:02,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 748 transitions. [2021-06-05 05:03:02,536 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 748 transitions. Word has length 18 [2021-06-05 05:03:02,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:02,536 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 748 transitions. [2021-06-05 05:03:02,536 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) [2021-06-05 05:03:02,536 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 748 transitions. [2021-06-05 05:03:02,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:02,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:02,537 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:02,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12339,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:02,737 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:02,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:02,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1721197542, now seen corresponding path program 384 times [2021-06-05 05:03:02,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:02,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019059256] [2021-06-05 05:03:02,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:02,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:02,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019059256] [2021-06-05 05:03:02,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019059256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:02,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277087060] [2021-06-05 05:03:02,853 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 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 [2021-06-05 05:03:02,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:03:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:02,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:02,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:03,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277087060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:03,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:03,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:03:03,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859135309] [2021-06-05 05:03:03,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:03,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:03,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:03,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:03,252 INFO L87 Difference]: Start difference. First operand 281 states and 748 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:03,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:03,632 INFO L93 Difference]: Finished difference Result 395 states and 941 transitions. [2021-06-05 05:03:03,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:03:03,633 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:03:03,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:03,633 INFO L225 Difference]: With dead ends: 395 [2021-06-05 05:03:03,633 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 05:03:03,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 357.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:03:03,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 05:03:03,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 282. [2021-06-05 05:03:03,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 05:03:03,636 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 05:03:03,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:03,636 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 05:03:03,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:03,636 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 05:03:03,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:03,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:03,637 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:03,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12411 [2021-06-05 05:03:03,837 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:03,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:03,837 INFO L82 PathProgramCache]: Analyzing trace with hash -882185118, now seen corresponding path program 385 times [2021-06-05 05:03:03,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:03,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136418536] [2021-06-05 05:03:03,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:03,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136418536] [2021-06-05 05:03:03,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136418536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219193683] [2021-06-05 05:03:03,967 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 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 [2021-06-05 05:03:03,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:03,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:03,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:04,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219193683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:04,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:04,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:03:04,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064726482] [2021-06-05 05:03:04,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:04,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:04,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:04,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:04,485 INFO L87 Difference]: Start difference. First operand 282 states and 752 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:04,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:04,897 INFO L93 Difference]: Finished difference Result 383 states and 923 transitions. [2021-06-05 05:03:04,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:03:04,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:03:04,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:04,898 INFO L225 Difference]: With dead ends: 383 [2021-06-05 05:03:04,898 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 05:03:04,898 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:03:04,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 05:03:04,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 05:03:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:04,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-06-05 05:03:04,901 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-06-05 05:03:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:04,901 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-06-05 05:03:04,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:04,901 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-06-05 05:03:04,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:04,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:04,901 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:05,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12537,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:05,102 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:05,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:05,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1185967740, now seen corresponding path program 386 times [2021-06-05 05:03:05,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:05,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064032927] [2021-06-05 05:03:05,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:05,217 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:05,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064032927] [2021-06-05 05:03:05,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064032927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:05,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405266034] [2021-06-05 05:03:05,217 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 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 [2021-06-05 05:03:05,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:05,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:05,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:05,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:05,485 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:05,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405266034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:05,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:05,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:03:05,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785351192] [2021-06-05 05:03:05,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:05,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:05,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:05,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:05,486 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:05,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:05,957 INFO L93 Difference]: Finished difference Result 400 states and 952 transitions. [2021-06-05 05:03:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:03:05,958 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:03:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:05,958 INFO L225 Difference]: With dead ends: 400 [2021-06-05 05:03:05,958 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 05:03:05,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 05:03:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 282. [2021-06-05 05:03:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:05,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-06-05 05:03:05,961 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-06-05 05:03:05,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:05,961 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-06-05 05:03:05,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-06-05 05:03:05,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:05,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:05,962 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:06,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12708 [2021-06-05 05:03:06,162 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:06,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1417414920, now seen corresponding path program 387 times [2021-06-05 05:03:06,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:06,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092283837] [2021-06-05 05:03:06,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:06,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:06,283 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:06,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:06,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092283837] [2021-06-05 05:03:06,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092283837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:06,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985269002] [2021-06-05 05:03:06,283 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 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 [2021-06-05 05:03:06,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:03:06,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:06,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:06,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:06,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985269002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:06,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:06,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:03:06,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600147824] [2021-06-05 05:03:06,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:06,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:06,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:06,567 INFO L87 Difference]: Start difference. First operand 282 states and 753 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:07,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:07,062 INFO L93 Difference]: Finished difference Result 401 states and 952 transitions. [2021-06-05 05:03:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:03:07,063 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:03:07,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:07,063 INFO L225 Difference]: With dead ends: 401 [2021-06-05 05:03:07,063 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 05:03:07,063 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 547.6ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:07,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 05:03:07,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 281. [2021-06-05 05:03:07,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 2.675) internal successors, (749), 280 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:07,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 749 transitions. [2021-06-05 05:03:07,066 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 749 transitions. Word has length 18 [2021-06-05 05:03:07,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:07,066 INFO L482 AbstractCegarLoop]: Abstraction has 281 states and 749 transitions. [2021-06-05 05:03:07,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:07,067 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 749 transitions. [2021-06-05 05:03:07,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:07,067 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:07,067 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:07,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12742 [2021-06-05 05:03:07,267 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:07,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1244167228, now seen corresponding path program 388 times [2021-06-05 05:03:07,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:07,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86325009] [2021-06-05 05:03:07,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:07,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:07,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86325009] [2021-06-05 05:03:07,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86325009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:07,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579670907] [2021-06-05 05:03:07,409 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 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 [2021-06-05 05:03:07,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:07,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:07,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:07,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:07,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:07,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579670907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:07,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:07,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2021-06-05 05:03:07,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354485105] [2021-06-05 05:03:07,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:07,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:07,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:07,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:07,736 INFO L87 Difference]: Start difference. First operand 281 states and 749 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:08,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:08,288 INFO L93 Difference]: Finished difference Result 383 states and 921 transitions. [2021-06-05 05:03:08,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:03:08,288 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have 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 [2021-06-05 05:03:08,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:08,288 INFO L225 Difference]: With dead ends: 383 [2021-06-05 05:03:08,289 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 05:03:08,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 660.6ms TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:03:08,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 05:03:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 279. [2021-06-05 05:03:08,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:08,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2021-06-05 05:03:08,292 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 18 [2021-06-05 05:03:08,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:08,292 INFO L482 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2021-06-05 05:03:08,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:08,292 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2021-06-05 05:03:08,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:08,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:08,292 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:08,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12778 [2021-06-05 05:03:08,492 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:08,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1773713062, now seen corresponding path program 389 times [2021-06-05 05:03:08,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:08,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598344455] [2021-06-05 05:03:08,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:08,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:08,687 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:03:08,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598344455] [2021-06-05 05:03:08,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598344455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:08,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359413794] [2021-06-05 05:03:08,687 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 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 [2021-06-05 05:03:08,714 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:08,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:08,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 05:03:08,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:09,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359413794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:09,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:09,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:03:09,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242159809] [2021-06-05 05:03:09,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:09,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:09,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:09,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:09,004 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:09,476 INFO L93 Difference]: Finished difference Result 344 states and 853 transitions. [2021-06-05 05:03:09,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:03:09,476 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:03:09,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:09,476 INFO L225 Difference]: With dead ends: 344 [2021-06-05 05:03:09,476 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 05:03:09,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:03:09,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 05:03:09,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 283. [2021-06-05 05:03:09,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.6843971631205674) internal successors, (757), 282 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:09,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 757 transitions. [2021-06-05 05:03:09,479 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 757 transitions. Word has length 18 [2021-06-05 05:03:09,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:09,479 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 757 transitions. [2021-06-05 05:03:09,479 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:09,479 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 757 transitions. [2021-06-05 05:03:09,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:09,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:09,480 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:09,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12815,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:09,680 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -829669598, now seen corresponding path program 390 times [2021-06-05 05:03:09,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:09,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990589446] [2021-06-05 05:03:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:09,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:09,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:03:09,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:09,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990589446] [2021-06-05 05:03:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990589446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:09,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905942273] [2021-06-05 05:03:09,867 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 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 [2021-06-05 05:03:09,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:03:09,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:09,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:09,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:10,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:10,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905942273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:10,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:10,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 16 [2021-06-05 05:03:10,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619830983] [2021-06-05 05:03:10,181 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:10,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:10,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:10,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:10,181 INFO L87 Difference]: Start difference. First operand 283 states and 757 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:10,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:10,606 INFO L93 Difference]: Finished difference Result 346 states and 855 transitions. [2021-06-05 05:03:10,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:03:10,606 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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 18 [2021-06-05 05:03:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:10,607 INFO L225 Difference]: With dead ends: 346 [2021-06-05 05:03:10,607 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 05:03:10,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 576.6ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:03:10,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 05:03:10,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 282. [2021-06-05 05:03:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.679715302491103) internal successors, (753), 281 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 753 transitions. [2021-06-05 05:03:10,610 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 753 transitions. Word has length 18 [2021-06-05 05:03:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:10,610 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 753 transitions. [2021-06-05 05:03:10,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 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) [2021-06-05 05:03:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 753 transitions. [2021-06-05 05:03:10,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:10,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:10,610 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:10,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12851 [2021-06-05 05:03:10,811 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:10,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:10,811 INFO L82 PathProgramCache]: Analyzing trace with hash -656421906, now seen corresponding path program 391 times [2021-06-05 05:03:10,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:10,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874641432] [2021-06-05 05:03:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:10,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:10,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:10,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874641432] [2021-06-05 05:03:10,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874641432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:10,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164116199] [2021-06-05 05:03:10,995 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 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 [2021-06-05 05:03:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:11,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:11,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:11,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164116199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:11,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:11,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:03:11,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104841408] [2021-06-05 05:03:11,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:03:11,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:11,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:03:11,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:03:11,388 INFO L87 Difference]: Start difference. First operand 282 states and 753 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) [2021-06-05 05:03:11,929 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2021-06-05 05:03:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:12,001 INFO L93 Difference]: Finished difference Result 303 states and 783 transitions. [2021-06-05 05:03:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:12,001 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 [2021-06-05 05:03:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:12,001 INFO L225 Difference]: With dead ends: 303 [2021-06-05 05:03:12,001 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 05:03:12,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 721.1ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:03:12,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 05:03:12,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 282. [2021-06-05 05:03:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 05:03:12,004 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 05:03:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:12,004 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 05:03:12,004 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) [2021-06-05 05:03:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 05:03:12,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:12,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:12,005 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:12,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12888,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:12,205 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:12,205 INFO L82 PathProgramCache]: Analyzing trace with hash 419289250, now seen corresponding path program 392 times [2021-06-05 05:03:12,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:12,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202092663] [2021-06-05 05:03:12,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:12,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:03:12,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202092663] [2021-06-05 05:03:12,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202092663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:12,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674484862] [2021-06-05 05:03:12,351 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 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 [2021-06-05 05:03:12,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:12,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:12,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:03:12,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:12,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,889 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 29 treesize of output 21 [2021-06-05 05:03:12,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:12,896 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:03:12,896 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,903 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 23 treesize of output 17 [2021-06-05 05:03:12,903 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:12,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,910 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 23 treesize of output 17 [2021-06-05 05:03:12,911 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:12,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:12,917 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 30 treesize of output 22 [2021-06-05 05:03:12,918 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:12,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:03:12,924 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:13,117 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 65 [2021-06-05 05:03:13,118 INFO L628 ElimStorePlain]: treesize reduction 927, result has 11.8 percent of original size [2021-06-05 05:03:13,118 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:13,121 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 7 treesize of output 5 [2021-06-05 05:03:13,122 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:13,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:13,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:13,169 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 16 treesize of output 12 [2021-06-05 05:03:13,170 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:13,207 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:13,207 INFO L518 ElimStorePlain]: Eliminatee v_prenex_356 vanished before elimination [2021-06-05 05:03:13,210 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 [2021-06-05 05:03:13,210 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:13,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:13,245 INFO L518 ElimStorePlain]: Eliminatee v_prenex_358 vanished before elimination [2021-06-05 05:03:13,245 INFO L518 ElimStorePlain]: Eliminatee v_prenex_359 vanished before elimination [2021-06-05 05:03:13,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:03:13,247 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:03:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:13,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674484862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:13,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:13,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-06-05 05:03:13,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731902441] [2021-06-05 05:03:13,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:13,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:13,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:13,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:13,358 INFO L87 Difference]: Start difference. First operand 282 states and 752 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) [2021-06-05 05:03:13,705 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 95 [2021-06-05 05:03:14,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:14,041 INFO L93 Difference]: Finished difference Result 351 states and 858 transitions. [2021-06-05 05:03:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:14,041 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 18 [2021-06-05 05:03:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:14,042 INFO L225 Difference]: With dead ends: 351 [2021-06-05 05:03:14,042 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 05:03:14,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 954.2ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:03:14,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 05:03:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 282. [2021-06-05 05:03:14,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 05:03:14,045 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 05:03:14,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:14,045 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 05:03:14,045 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) [2021-06-05 05:03:14,045 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 05:03:14,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:14,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:14,045 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:14,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12922 [2021-06-05 05:03:14,246 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:14,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:14,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1481018436, now seen corresponding path program 393 times [2021-06-05 05:03:14,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:14,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37816887] [2021-06-05 05:03:14,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:14,508 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:14,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:14,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37816887] [2021-06-05 05:03:14,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37816887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:14,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653951300] [2021-06-05 05:03:14,509 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 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 [2021-06-05 05:03:14,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:03:14,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:14,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:03:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:14,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,887 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 23 treesize of output 17 [2021-06-05 05:03:14,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:14,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,893 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 22 treesize of output 16 [2021-06-05 05:03:14,894 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:14,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,899 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 30 treesize of output 22 [2021-06-05 05:03:14,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:14,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,906 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 29 treesize of output 21 [2021-06-05 05:03:14,907 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:14,911 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,912 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 22 treesize of output 16 [2021-06-05 05:03:14,913 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:14,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:14,917 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 23 treesize of output 17 [2021-06-05 05:03:14,918 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:15,061 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 05:03:15,061 INFO L628 ElimStorePlain]: treesize reduction 676, result has 13.0 percent of original size [2021-06-05 05:03:15,062 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:15,065 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 16 treesize of output 12 [2021-06-05 05:03:15,066 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:15,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:15,098 INFO L518 ElimStorePlain]: Eliminatee v_prenex_365 vanished before elimination [2021-06-05 05:03:15,101 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 [2021-06-05 05:03:15,102 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:15,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:15,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_367 vanished before elimination [2021-06-05 05:03:15,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:03:15,135 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 05:03:15,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:15,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653951300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:15,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:15,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:03:15,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742371776] [2021-06-05 05:03:15,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:03:15,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:15,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:03:15,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:03:15,298 INFO L87 Difference]: Start difference. First operand 282 states and 752 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) [2021-06-05 05:03:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:15,981 INFO L93 Difference]: Finished difference Result 437 states and 1021 transitions. [2021-06-05 05:03:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:03:15,982 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 [2021-06-05 05:03:15,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:15,982 INFO L225 Difference]: With dead ends: 437 [2021-06-05 05:03:15,982 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 05:03:15,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 850.7ms TimeCoverageRelationStatistics Valid=89, Invalid=613, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 05:03:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 292. [2021-06-05 05:03:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.7010309278350517) internal successors, (786), 291 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:15,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 786 transitions. [2021-06-05 05:03:15,985 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 786 transitions. Word has length 18 [2021-06-05 05:03:15,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:15,985 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 786 transitions. [2021-06-05 05:03:15,985 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) [2021-06-05 05:03:15,985 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 786 transitions. [2021-06-05 05:03:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:15,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:15,986 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:16,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12968 [2021-06-05 05:03:16,186 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:16,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:16,186 INFO L82 PathProgramCache]: Analyzing trace with hash 210566200, now seen corresponding path program 394 times [2021-06-05 05:03:16,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:16,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187426109] [2021-06-05 05:03:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:16,339 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:16,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:16,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187426109] [2021-06-05 05:03:16,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187426109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:16,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811289717] [2021-06-05 05:03:16,339 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 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 [2021-06-05 05:03:16,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:16,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:16,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:16,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:16,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811289717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:16,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:16,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:16,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225732318] [2021-06-05 05:03:16,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:16,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:16,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:16,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:16,705 INFO L87 Difference]: Start difference. First operand 292 states and 786 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) [2021-06-05 05:03:17,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:17,114 INFO L93 Difference]: Finished difference Result 416 states and 986 transitions. [2021-06-05 05:03:17,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:03:17,115 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 18 [2021-06-05 05:03:17,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:17,115 INFO L225 Difference]: With dead ends: 416 [2021-06-05 05:03:17,115 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 05:03:17,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 494.9ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:03:17,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 05:03:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 05:03:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.696551724137931) internal successors, (782), 290 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:17,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 782 transitions. [2021-06-05 05:03:17,118 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 782 transitions. Word has length 18 [2021-06-05 05:03:17,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:17,119 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 782 transitions. [2021-06-05 05:03:17,119 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) [2021-06-05 05:03:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 782 transitions. [2021-06-05 05:03:17,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:17,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:17,119 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:17,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13006 [2021-06-05 05:03:17,319 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:17,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:17,320 INFO L82 PathProgramCache]: Analyzing trace with hash 383813892, now seen corresponding path program 395 times [2021-06-05 05:03:17,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:17,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617147802] [2021-06-05 05:03:17,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:17,544 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:17,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:17,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617147802] [2021-06-05 05:03:17,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617147802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:17,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598800117] [2021-06-05 05:03:17,545 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 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 [2021-06-05 05:03:17,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:17,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:17,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:17,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:17,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:17,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598800117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:17,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:17,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:17,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732140478] [2021-06-05 05:03:17,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:17,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:17,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:17,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:17,948 INFO L87 Difference]: Start difference. First operand 291 states and 782 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:03:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:18,589 INFO L93 Difference]: Finished difference Result 418 states and 980 transitions. [2021-06-05 05:03:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:03:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:03:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:18,590 INFO L225 Difference]: With dead ends: 418 [2021-06-05 05:03:18,590 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 05:03:18,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 779.1ms TimeCoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:03:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 05:03:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 287. [2021-06-05 05:03:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6853146853146854) internal successors, (768), 286 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 768 transitions. [2021-06-05 05:03:18,593 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 768 transitions. Word has length 18 [2021-06-05 05:03:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:18,593 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 768 transitions. [2021-06-05 05:03:18,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:03:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 768 transitions. [2021-06-05 05:03:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:18,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:18,593 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:18,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13041 [2021-06-05 05:03:18,794 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1459525048, now seen corresponding path program 396 times [2021-06-05 05:03:18,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:18,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652513104] [2021-06-05 05:03:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:19,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:19,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:19,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652513104] [2021-06-05 05:03:19,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652513104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:19,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761267296] [2021-06-05 05:03:19,235 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 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 [2021-06-05 05:03:19,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:03:19,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:19,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:19,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:19,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761267296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:19,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:19,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-06-05 05:03:19,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903551403] [2021-06-05 05:03:19,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:03:19,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:19,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:03:19,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:03:19,680 INFO L87 Difference]: Start difference. First operand 287 states and 768 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) [2021-06-05 05:03:20,160 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2021-06-05 05:03:20,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:20,346 INFO L93 Difference]: Finished difference Result 310 states and 803 transitions. [2021-06-05 05:03:20,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:20,346 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 [2021-06-05 05:03:20,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:20,346 INFO L225 Difference]: With dead ends: 310 [2021-06-05 05:03:20,347 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 05:03:20,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1103.2ms TimeCoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:03:20,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 05:03:20,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 286. [2021-06-05 05:03:20,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.6842105263157894) internal successors, (765), 285 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:20,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 765 transitions. [2021-06-05 05:03:20,349 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 765 transitions. Word has length 18 [2021-06-05 05:03:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:20,349 INFO L482 AbstractCegarLoop]: Abstraction has 286 states and 765 transitions. [2021-06-05 05:03:20,349 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) [2021-06-05 05:03:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 765 transitions. [2021-06-05 05:03:20,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:20,350 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:20,350 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:20,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13075,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:20,577 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:20,577 INFO L82 PathProgramCache]: Analyzing trace with hash 446832516, now seen corresponding path program 397 times [2021-06-05 05:03:20,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:20,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868726067] [2021-06-05 05:03:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:20,836 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:20,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:20,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868726067] [2021-06-05 05:03:20,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868726067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:20,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228689995] [2021-06-05 05:03:20,836 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 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 [2021-06-05 05:03:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:20,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:20,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:21,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228689995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:21,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:21,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2021-06-05 05:03:21,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086434420] [2021-06-05 05:03:21,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:03:21,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:21,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:03:21,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:21,231 INFO L87 Difference]: Start difference. First operand 286 states and 765 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) [2021-06-05 05:03:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:21,624 INFO L93 Difference]: Finished difference Result 383 states and 914 transitions. [2021-06-05 05:03:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:21,625 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 18 [2021-06-05 05:03:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:21,625 INFO L225 Difference]: With dead ends: 383 [2021-06-05 05:03:21,625 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 05:03:21,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 638.6ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:03:21,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 05:03:21,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 282. [2021-06-05 05:03:21,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.676156583629893) internal successors, (752), 281 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 752 transitions. [2021-06-05 05:03:21,633 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 752 transitions. Word has length 18 [2021-06-05 05:03:21,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:21,633 INFO L482 AbstractCegarLoop]: Abstraction has 282 states and 752 transitions. [2021-06-05 05:03:21,633 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) [2021-06-05 05:03:21,633 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 752 transitions. [2021-06-05 05:03:21,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:21,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:21,633 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:21,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13110,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:21,849 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:21,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:21,849 INFO L82 PathProgramCache]: Analyzing trace with hash 724445586, now seen corresponding path program 398 times [2021-06-05 05:03:21,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:21,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132855445] [2021-06-05 05:03:21,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:22,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:22,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132855445] [2021-06-05 05:03:22,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132855445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:22,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476280260] [2021-06-05 05:03:22,072 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 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 [2021-06-05 05:03:22,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:22,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:22,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:22,429 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:22,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476280260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:22,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:22,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:22,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427300736] [2021-06-05 05:03:22,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:22,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:22,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:22,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:22,429 INFO L87 Difference]: Start difference. First operand 282 states and 752 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) [2021-06-05 05:03:22,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:22,907 INFO L93 Difference]: Finished difference Result 391 states and 948 transitions. [2021-06-05 05:03:22,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:03:22,908 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 18 [2021-06-05 05:03:22,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:22,908 INFO L225 Difference]: With dead ends: 391 [2021-06-05 05:03:22,908 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 05:03:22,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 558.5ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:03:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 05:03:22,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 290. [2021-06-05 05:03:22,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.698961937716263) internal successors, (780), 289 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:22,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 780 transitions. [2021-06-05 05:03:22,911 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 780 transitions. Word has length 18 [2021-06-05 05:03:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:22,911 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 780 transitions. [2021-06-05 05:03:22,911 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) [2021-06-05 05:03:22,911 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 780 transitions. [2021-06-05 05:03:22,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:22,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:22,912 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:23,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13144,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:23,112 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:23,112 INFO L82 PathProgramCache]: Analyzing trace with hash 23952598, now seen corresponding path program 399 times [2021-06-05 05:03:23,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:23,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327700299] [2021-06-05 05:03:23,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:23,235 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:23,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:23,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327700299] [2021-06-05 05:03:23,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327700299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:23,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464691246] [2021-06-05 05:03:23,235 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 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 [2021-06-05 05:03:23,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:03:23,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:23,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:23,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:23,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464691246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:23,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:23,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:03:23,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39807874] [2021-06-05 05:03:23,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:23,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:23,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:23,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:23,630 INFO L87 Difference]: Start difference. First operand 290 states and 780 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:24,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:24,117 INFO L93 Difference]: Finished difference Result 416 states and 996 transitions. [2021-06-05 05:03:24,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:03:24,118 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:03:24,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:24,118 INFO L225 Difference]: With dead ends: 416 [2021-06-05 05:03:24,118 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 05:03:24,119 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 386.1ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:03:24,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 05:03:24,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 05:03:24,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:24,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 05:03:24,121 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 05:03:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:24,122 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 05:03:24,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 05:03:24,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:24,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:24,122 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:24,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13216,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:24,323 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:24,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:24,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1715537234, now seen corresponding path program 400 times [2021-06-05 05:03:24,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:24,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771471703] [2021-06-05 05:03:24,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:24,447 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:24,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:24,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771471703] [2021-06-05 05:03:24,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771471703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:24,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107688351] [2021-06-05 05:03:24,447 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 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 [2021-06-05 05:03:24,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:24,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:24,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:24,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107688351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:24,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:24,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:03:24,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311586128] [2021-06-05 05:03:24,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:24,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:24,887 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:25,310 INFO L93 Difference]: Finished difference Result 401 states and 973 transitions. [2021-06-05 05:03:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:03:25,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:03:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:25,311 INFO L225 Difference]: With dead ends: 401 [2021-06-05 05:03:25,311 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 05:03:25,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 394.3ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:03:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 05:03:25,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 288. [2021-06-05 05:03:25,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.6933797909407664) internal successors, (773), 287 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 773 transitions. [2021-06-05 05:03:25,314 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 773 transitions. Word has length 18 [2021-06-05 05:03:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:25,314 INFO L482 AbstractCegarLoop]: Abstraction has 288 states and 773 transitions. [2021-06-05 05:03:25,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 773 transitions. [2021-06-05 05:03:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:25,315 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:25,315 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:25,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13338 [2021-06-05 05:03:25,515 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash -511277204, now seen corresponding path program 401 times [2021-06-05 05:03:25,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:25,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963465523] [2021-06-05 05:03:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:25,640 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:25,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:25,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963465523] [2021-06-05 05:03:25,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963465523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:25,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364931617] [2021-06-05 05:03:25,641 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 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 [2021-06-05 05:03:25,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:03:25,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:25,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:25,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:25,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:25,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364931617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:25,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:25,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:03:25,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409389337] [2021-06-05 05:03:25,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:25,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:25,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:25,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:25,896 INFO L87 Difference]: Start difference. First operand 288 states and 773 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:26,469 INFO L93 Difference]: Finished difference Result 415 states and 999 transitions. [2021-06-05 05:03:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:03:26,469 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:03:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:26,470 INFO L225 Difference]: With dead ends: 415 [2021-06-05 05:03:26,470 INFO L226 Difference]: Without dead ends: 408 [2021-06-05 05:03:26,470 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 518.7ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:03:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-06-05 05:03:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 291. [2021-06-05 05:03:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 05:03:26,473 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 05:03:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:26,473 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 05:03:26,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 05:03:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:26,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:26,474 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:26,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13465 [2021-06-05 05:03:26,685 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1180307432, now seen corresponding path program 402 times [2021-06-05 05:03:26,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:26,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722230811] [2021-06-05 05:03:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:26,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:26,856 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:26,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722230811] [2021-06-05 05:03:26,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722230811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:26,856 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555596373] [2021-06-05 05:03:26,856 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 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 [2021-06-05 05:03:26,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:03:26,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:26,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:26,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555596373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:27,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:27,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:03:27,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225393661] [2021-06-05 05:03:27,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:27,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:27,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:27,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:27,150 INFO L87 Difference]: Start difference. First operand 291 states and 784 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) [2021-06-05 05:03:27,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:27,816 INFO L93 Difference]: Finished difference Result 416 states and 999 transitions. [2021-06-05 05:03:27,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:03:27,816 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 18 [2021-06-05 05:03:27,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:27,817 INFO L225 Difference]: With dead ends: 416 [2021-06-05 05:03:27,817 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 05:03:27,817 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:03:27,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 05:03:27,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 291. [2021-06-05 05:03:27,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 05:03:27,820 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 05:03:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:27,820 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 05:03:27,820 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) [2021-06-05 05:03:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 05:03:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:27,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:27,821 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:28,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13499 [2021-06-05 05:03:28,021 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:28,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:28,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1353555124, now seen corresponding path program 403 times [2021-06-05 05:03:28,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:28,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955020476] [2021-06-05 05:03:28,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:28,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:28,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:28,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:28,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955020476] [2021-06-05 05:03:28,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955020476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:28,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929340986] [2021-06-05 05:03:28,153 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 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 [2021-06-05 05:03:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:28,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:28,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:28,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929340986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:28,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:28,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:03:28,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871843259] [2021-06-05 05:03:28,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:28,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:28,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:28,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:28,473 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:29,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:29,030 INFO L93 Difference]: Finished difference Result 398 states and 968 transitions. [2021-06-05 05:03:29,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:03:29,030 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:03:29,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:29,030 INFO L225 Difference]: With dead ends: 398 [2021-06-05 05:03:29,030 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 05:03:29,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 609.0ms TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:03:29,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 05:03:29,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 291. [2021-06-05 05:03:29,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.703448275862069) internal successors, (784), 290 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:29,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 784 transitions. [2021-06-05 05:03:29,034 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 784 transitions. Word has length 18 [2021-06-05 05:03:29,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:29,034 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 784 transitions. [2021-06-05 05:03:29,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:29,034 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 784 transitions. [2021-06-05 05:03:29,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:29,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:29,034 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:29,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13538 [2021-06-05 05:03:29,234 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:29,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:29,235 INFO L82 PathProgramCache]: Analyzing trace with hash 76468118, now seen corresponding path program 404 times [2021-06-05 05:03:29,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:29,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473272147] [2021-06-05 05:03:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:29,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:29,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:29,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473272147] [2021-06-05 05:03:29,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473272147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:29,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560354872] [2021-06-05 05:03:29,436 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 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 [2021-06-05 05:03:29,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:29,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:29,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:29,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:29,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560354872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:29,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:29,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:03:29,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787977941] [2021-06-05 05:03:29,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:29,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:29,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:29,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:29,720 INFO L87 Difference]: Start difference. First operand 291 states and 784 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:30,250 INFO L93 Difference]: Finished difference Result 375 states and 931 transitions. [2021-06-05 05:03:30,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:30,250 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:03:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:30,250 INFO L225 Difference]: With dead ends: 375 [2021-06-05 05:03:30,250 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 05:03:30,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 595.8ms TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:03:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 05:03:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 295. [2021-06-05 05:03:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:30,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-06-05 05:03:30,253 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 18 [2021-06-05 05:03:30,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:30,253 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-06-05 05:03:30,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-06-05 05:03:30,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:30,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:30,254 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:30,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13573,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:30,454 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:30,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:30,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1768052754, now seen corresponding path program 405 times [2021-06-05 05:03:30,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:30,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840111970] [2021-06-05 05:03:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:30,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:30,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:30,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840111970] [2021-06-05 05:03:30,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840111970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:30,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493021334] [2021-06-05 05:03:30,644 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 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 [2021-06-05 05:03:30,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:03:30,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:30,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:30,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:30,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493021334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:30,966 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:30,966 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:03:30,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560717262] [2021-06-05 05:03:30,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:30,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:30,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:30,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:30,967 INFO L87 Difference]: Start difference. First operand 295 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:31,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:31,671 INFO L93 Difference]: Finished difference Result 405 states and 978 transitions. [2021-06-05 05:03:31,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:03:31,672 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:03:31,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:31,672 INFO L225 Difference]: With dead ends: 405 [2021-06-05 05:03:31,672 INFO L226 Difference]: Without dead ends: 391 [2021-06-05 05:03:31,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 762.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:03:31,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-06-05 05:03:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 294. [2021-06-05 05:03:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:31,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 05:03:31,675 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 05:03:31,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:31,675 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 05:03:31,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:31,675 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 05:03:31,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:31,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:31,676 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:31,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13607,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:31,876 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:31,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:31,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1941300446, now seen corresponding path program 406 times [2021-06-05 05:03:31,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:31,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799390774] [2021-06-05 05:03:31,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:31,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:32,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:32,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799390774] [2021-06-05 05:03:32,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799390774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:32,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021720742] [2021-06-05 05:03:32,012 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 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 [2021-06-05 05:03:32,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:32,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:32,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:32,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:32,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:32,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021720742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:32,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:32,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:03:32,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831218346] [2021-06-05 05:03:32,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:32,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:32,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:32,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:32,351 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:32,912 INFO L93 Difference]: Finished difference Result 373 states and 923 transitions. [2021-06-05 05:03:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:03:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:32,912 INFO L225 Difference]: With dead ends: 373 [2021-06-05 05:03:32,912 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 05:03:32,913 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 05:03:32,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 294. [2021-06-05 05:03:32,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 05:03:32,915 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 05:03:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:32,916 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 05:03:32,916 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 05:03:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:32,916 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:32,916 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:33,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13641 [2021-06-05 05:03:33,116 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:33,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1277955694, now seen corresponding path program 407 times [2021-06-05 05:03:33,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:33,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820264281] [2021-06-05 05:03:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:33,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:33,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:33,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:33,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820264281] [2021-06-05 05:03:33,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820264281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:33,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500630390] [2021-06-05 05:03:33,315 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 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 [2021-06-05 05:03:33,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:33,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:33,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:33,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:33,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500630390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:33,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:33,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:33,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855277318] [2021-06-05 05:03:33,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:33,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:33,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:33,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:33,665 INFO L87 Difference]: Start difference. First operand 294 states and 795 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) [2021-06-05 05:03:34,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:34,259 INFO L93 Difference]: Finished difference Result 371 states and 918 transitions. [2021-06-05 05:03:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:34,260 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 18 [2021-06-05 05:03:34,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:34,260 INFO L225 Difference]: With dead ends: 371 [2021-06-05 05:03:34,260 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 05:03:34,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 750.7ms TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 05:03:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 294. [2021-06-05 05:03:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.7133105802047783) internal successors, (795), 293 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 795 transitions. [2021-06-05 05:03:34,263 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 795 transitions. Word has length 18 [2021-06-05 05:03:34,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:34,263 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 795 transitions. [2021-06-05 05:03:34,263 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) [2021-06-05 05:03:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 795 transitions. [2021-06-05 05:03:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:34,264 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:34,264 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:34,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13676 [2021-06-05 05:03:34,464 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:34,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:34,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1116703916, now seen corresponding path program 408 times [2021-06-05 05:03:34,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:34,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146847432] [2021-06-05 05:03:34,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:34,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146847432] [2021-06-05 05:03:34,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146847432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:34,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487803444] [2021-06-05 05:03:34,613 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 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 [2021-06-05 05:03:34,640 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:03:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:34,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:34,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:34,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487803444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:34,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:34,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:03:34,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6555335] [2021-06-05 05:03:34,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:34,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:34,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:34,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:34,943 INFO L87 Difference]: Start difference. First operand 294 states and 795 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:35,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:35,230 INFO L93 Difference]: Finished difference Result 334 states and 863 transitions. [2021-06-05 05:03:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:35,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:03:35,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:35,231 INFO L225 Difference]: With dead ends: 334 [2021-06-05 05:03:35,231 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 05:03:35,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 393.9ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:35,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 05:03:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 298. [2021-06-05 05:03:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7205387205387206) internal successors, (808), 297 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 808 transitions. [2021-06-05 05:03:35,234 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 808 transitions. Word has length 18 [2021-06-05 05:03:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:35,234 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 808 transitions. [2021-06-05 05:03:35,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:35,234 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 808 transitions. [2021-06-05 05:03:35,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:35,234 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:35,234 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:35,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13710 [2021-06-05 05:03:35,435 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:35,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:35,435 INFO L82 PathProgramCache]: Analyzing trace with hash -1486678744, now seen corresponding path program 409 times [2021-06-05 05:03:35,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:35,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685420096] [2021-06-05 05:03:35,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:35,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:35,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685420096] [2021-06-05 05:03:35,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685420096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:35,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286004036] [2021-06-05 05:03:35,737 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 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 [2021-06-05 05:03:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:35,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:35,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:36,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286004036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:36,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:36,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:36,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287259420] [2021-06-05 05:03:36,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:36,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:36,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:36,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:36,113 INFO L87 Difference]: Start difference. First operand 298 states and 808 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) [2021-06-05 05:03:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:36,701 INFO L93 Difference]: Finished difference Result 336 states and 865 transitions. [2021-06-05 05:03:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:36,701 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 18 [2021-06-05 05:03:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:36,701 INFO L225 Difference]: With dead ends: 336 [2021-06-05 05:03:36,702 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 05:03:36,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 816.0ms TimeCoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:03:36,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 05:03:36,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 297. [2021-06-05 05:03:36,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:36,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 05:03:36,704 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 18 [2021-06-05 05:03:36,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:36,705 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 05:03:36,705 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) [2021-06-05 05:03:36,705 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 05:03:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:36,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:36,705 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:36,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13744,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:36,905 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:36,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1313431052, now seen corresponding path program 410 times [2021-06-05 05:03:36,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:36,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959906802] [2021-06-05 05:03:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:37,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959906802] [2021-06-05 05:03:37,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959906802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:37,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539542377] [2021-06-05 05:03:37,080 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 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 [2021-06-05 05:03:37,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:37,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:37,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:37,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:37,507 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:37,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539542377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:37,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:37,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:37,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730832520] [2021-06-05 05:03:37,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:37,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:37,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:37,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:37,508 INFO L87 Difference]: Start difference. First operand 297 states and 804 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:03:38,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:38,122 INFO L93 Difference]: Finished difference Result 323 states and 842 transitions. [2021-06-05 05:03:38,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:03:38,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:38,123 INFO L225 Difference]: With dead ends: 323 [2021-06-05 05:03:38,123 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 05:03:38,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 772.3ms TimeCoverageRelationStatistics Valid=60, Invalid=446, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:03:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 05:03:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 297. [2021-06-05 05:03:38,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 05:03:38,126 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 05:03:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:38,126 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 05:03:38,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:03:38,126 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 05:03:38,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:38,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:38,126 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:38,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13778 [2021-06-05 05:03:38,334 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:38,335 INFO L82 PathProgramCache]: Analyzing trace with hash -237719896, now seen corresponding path program 411 times [2021-06-05 05:03:38,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:38,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041783093] [2021-06-05 05:03:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:38,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:38,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041783093] [2021-06-05 05:03:38,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041783093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:38,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058509980] [2021-06-05 05:03:38,519 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 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 [2021-06-05 05:03:38,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:03:38,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:38,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:38,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058509980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:38,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:38,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-05 05:03:38,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444682487] [2021-06-05 05:03:38,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:38,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:38,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:38,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:38,903 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:39,163 INFO L93 Difference]: Finished difference Result 323 states and 843 transitions. [2021-06-05 05:03:39,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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 18 [2021-06-05 05:03:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:39,163 INFO L225 Difference]: With dead ends: 323 [2021-06-05 05:03:39,163 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 05:03:39,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 487.9ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:39,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 05:03:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 297. [2021-06-05 05:03:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:39,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 05:03:39,166 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 05:03:39,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:39,166 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 05:03:39,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-06-05 05:03:39,166 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 05:03:39,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:39,167 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:39,167 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:39,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13813 [2021-06-05 05:03:39,367 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:39,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:39,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1250412428, now seen corresponding path program 412 times [2021-06-05 05:03:39,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:39,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658982940] [2021-06-05 05:03:39,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:39,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:39,516 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:39,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:39,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658982940] [2021-06-05 05:03:39,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658982940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:39,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525399164] [2021-06-05 05:03:39,517 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 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 [2021-06-05 05:03:39,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:39,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:39,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:39,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525399164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:39,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:39,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:39,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326819870] [2021-06-05 05:03:39,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:39,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:39,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:39,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:39,935 INFO L87 Difference]: Start difference. First operand 297 states and 803 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) [2021-06-05 05:03:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:40,207 INFO L93 Difference]: Finished difference Result 321 states and 840 transitions. [2021-06-05 05:03:40,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:40,207 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 18 [2021-06-05 05:03:40,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:40,207 INFO L225 Difference]: With dead ends: 321 [2021-06-05 05:03:40,207 INFO L226 Difference]: Without dead ends: 314 [2021-06-05 05:03:40,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 469.3ms TimeCoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:03:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-06-05 05:03:40,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 297. [2021-06-05 05:03:40,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7128378378378377) internal successors, (803), 296 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 803 transitions. [2021-06-05 05:03:40,210 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 803 transitions. Word has length 18 [2021-06-05 05:03:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:40,211 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 803 transitions. [2021-06-05 05:03:40,211 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) [2021-06-05 05:03:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 803 transitions. [2021-06-05 05:03:40,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:40,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:40,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:40,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13847,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:40,411 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:40,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:40,412 INFO L82 PathProgramCache]: Analyzing trace with hash 2031785404, now seen corresponding path program 413 times [2021-06-05 05:03:40,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:40,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723608303] [2021-06-05 05:03:40,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:40,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:40,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723608303] [2021-06-05 05:03:40,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723608303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:40,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886169806] [2021-06-05 05:03:40,582 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 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 [2021-06-05 05:03:40,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:03:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:40,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:40,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:40,779 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:40,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886169806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:40,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:40,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 05:03:40,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683159491] [2021-06-05 05:03:40,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:03:40,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:40,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:03:40,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:03:40,780 INFO L87 Difference]: Start difference. First operand 297 states and 803 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:03:41,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:41,162 INFO L93 Difference]: Finished difference Result 419 states and 1119 transitions. [2021-06-05 05:03:41,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:41,162 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 18 [2021-06-05 05:03:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:41,163 INFO L225 Difference]: With dead ends: 419 [2021-06-05 05:03:41,163 INFO L226 Difference]: Without dead ends: 412 [2021-06-05 05:03:41,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:41,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-06-05 05:03:41,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 302. [2021-06-05 05:03:41,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.7209302325581395) internal successors, (819), 301 states have internal predecessors, (819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 819 transitions. [2021-06-05 05:03:41,166 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 819 transitions. Word has length 18 [2021-06-05 05:03:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:41,166 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 819 transitions. [2021-06-05 05:03:41,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:03:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 819 transitions. [2021-06-05 05:03:41,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:41,166 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:41,166 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:41,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13882,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:41,367 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:41,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash -571597256, now seen corresponding path program 414 times [2021-06-05 05:03:41,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:41,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968659027] [2021-06-05 05:03:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:41,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:41,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968659027] [2021-06-05 05:03:41,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968659027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:41,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113101431] [2021-06-05 05:03:41,543 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 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 [2021-06-05 05:03:41,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:03:41,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:41,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:41,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:41,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113101431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:41,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:41,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 05:03:41,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751446829] [2021-06-05 05:03:41,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:03:41,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:41,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:03:41,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:03:41,743 INFO L87 Difference]: Start difference. First operand 302 states and 819 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:03:42,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:42,084 INFO L93 Difference]: Finished difference Result 421 states and 1121 transitions. [2021-06-05 05:03:42,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 18 [2021-06-05 05:03:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:42,085 INFO L225 Difference]: With dead ends: 421 [2021-06-05 05:03:42,085 INFO L226 Difference]: Without dead ends: 414 [2021-06-05 05:03:42,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 459.2ms TimeCoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-05 05:03:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 301. [2021-06-05 05:03:42,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:42,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 05:03:42,088 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 18 [2021-06-05 05:03:42,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:42,089 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 05:03:42,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:03:42,089 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 05:03:42,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:42,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:42,089 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:42,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13892,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:42,289 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:42,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:42,290 INFO L82 PathProgramCache]: Analyzing trace with hash -398349564, now seen corresponding path program 415 times [2021-06-05 05:03:42,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:42,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072971012] [2021-06-05 05:03:42,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:42,471 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:42,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072971012] [2021-06-05 05:03:42,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072971012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:42,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603874663] [2021-06-05 05:03:42,472 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 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 [2021-06-05 05:03:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:42,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:42,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:42,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603874663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:42,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:42,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:03:42,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470970701] [2021-06-05 05:03:42,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:42,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:42,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:42,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:42,704 INFO L87 Difference]: Start difference. First operand 301 states and 815 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:43,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:43,034 INFO L93 Difference]: Finished difference Result 408 states and 1100 transitions. [2021-06-05 05:03:43,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:43,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:03:43,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:43,035 INFO L225 Difference]: With dead ends: 408 [2021-06-05 05:03:43,035 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 05:03:43,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 473.3ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:43,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 05:03:43,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 300. [2021-06-05 05:03:43,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7157190635451505) internal successors, (812), 299 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:43,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 812 transitions. [2021-06-05 05:03:43,038 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 812 transitions. Word has length 18 [2021-06-05 05:03:43,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:43,039 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 812 transitions. [2021-06-05 05:03:43,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:43,039 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 812 transitions. [2021-06-05 05:03:43,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:43,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:43,039 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:43,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13904 [2021-06-05 05:03:43,239 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:43,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:43,240 INFO L82 PathProgramCache]: Analyzing trace with hash 677361592, now seen corresponding path program 416 times [2021-06-05 05:03:43,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:43,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596161739] [2021-06-05 05:03:43,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:43,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596161739] [2021-06-05 05:03:43,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596161739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:43,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391004008] [2021-06-05 05:03:43,415 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 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 [2021-06-05 05:03:43,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:43,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:43,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:03:43,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:43,968 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,969 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,969 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 30 treesize of output 22 [2021-06-05 05:03:43,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,976 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,976 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 23 treesize of output 17 [2021-06-05 05:03:43,977 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,984 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,984 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 23 treesize of output 17 [2021-06-05 05:03:43,985 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,991 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,992 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 22 treesize of output 16 [2021-06-05 05:03:43,993 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:43,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:43,999 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 29 treesize of output 21 [2021-06-05 05:03:44,000 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:44,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:44,006 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 22 treesize of output 16 [2021-06-05 05:03:44,007 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:44,191 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 64 [2021-06-05 05:03:44,191 INFO L628 ElimStorePlain]: treesize reduction 908, result has 12.6 percent of original size [2021-06-05 05:03:44,195 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 15 treesize of output 11 [2021-06-05 05:03:44,196 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:44,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:44,236 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:44,239 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 16 treesize of output 12 [2021-06-05 05:03:44,240 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:44,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:44,277 INFO L518 ElimStorePlain]: Eliminatee v_prenex_400 vanished before elimination [2021-06-05 05:03:44,280 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 [2021-06-05 05:03:44,281 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:44,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:44,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_402 vanished before elimination [2021-06-05 05:03:44,317 INFO L518 ElimStorePlain]: Eliminatee v_prenex_403 vanished before elimination [2021-06-05 05:03:44,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:03:44,319 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:03:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:44,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391004008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:44,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:44,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2021-06-05 05:03:44,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905773837] [2021-06-05 05:03:44,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:03:44,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:44,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:03:44,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:03:44,428 INFO L87 Difference]: Start difference. First operand 300 states and 812 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:03:44,672 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 76 [2021-06-05 05:03:44,807 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 85 [2021-06-05 05:03:45,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:45,042 INFO L93 Difference]: Finished difference Result 407 states and 1097 transitions. [2021-06-05 05:03:45,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:45,042 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 18 [2021-06-05 05:03:45,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:45,043 INFO L225 Difference]: With dead ends: 407 [2021-06-05 05:03:45,043 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 05:03:45,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 991.7ms TimeCoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:03:45,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 05:03:45,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 299. [2021-06-05 05:03:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.714765100671141) internal successors, (809), 298 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:45,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 809 transitions. [2021-06-05 05:03:45,046 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 809 transitions. Word has length 18 [2021-06-05 05:03:45,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:45,046 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 809 transitions. [2021-06-05 05:03:45,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:03:45,046 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 809 transitions. [2021-06-05 05:03:45,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:45,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:45,047 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:45,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13918,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:45,247 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:45,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:45,247 INFO L82 PathProgramCache]: Analyzing trace with hash -335330940, now seen corresponding path program 417 times [2021-06-05 05:03:45,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:45,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587972116] [2021-06-05 05:03:45,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:45,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:45,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587972116] [2021-06-05 05:03:45,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587972116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:45,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317124082] [2021-06-05 05:03:45,409 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 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 [2021-06-05 05:03:45,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:03:45,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:45,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:45,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:45,637 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:45,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317124082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:45,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:45,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-05 05:03:45,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12538669] [2021-06-05 05:03:45,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:45,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:45,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:45,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:45,638 INFO L87 Difference]: Start difference. First operand 299 states and 809 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:46,082 INFO L93 Difference]: Finished difference Result 406 states and 1094 transitions. [2021-06-05 05:03:46,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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 18 [2021-06-05 05:03:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:46,083 INFO L225 Difference]: With dead ends: 406 [2021-06-05 05:03:46,083 INFO L226 Difference]: Without dead ends: 399 [2021-06-05 05:03:46,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 551.9ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:03:46,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2021-06-05 05:03:46,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 298. [2021-06-05 05:03:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 05:03:46,087 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 18 [2021-06-05 05:03:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:46,087 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 05:03:46,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-06-05 05:03:46,087 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 05:03:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 05:03:46,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:46,087 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:46,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13966 [2021-06-05 05:03:46,288 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:46,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:46,288 INFO L82 PathProgramCache]: Analyzing trace with hash -180893422, now seen corresponding path program 418 times [2021-06-05 05:03:46,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:46,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536951003] [2021-06-05 05:03:46,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:46,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:46,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536951003] [2021-06-05 05:03:46,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536951003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:46,439 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181847643] [2021-06-05 05:03:46,439 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 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 [2021-06-05 05:03:46,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:46,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:46,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 05:03:46,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181847643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:46,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:46,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-05 05:03:46,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495339445] [2021-06-05 05:03:46,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:03:46,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:03:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:03:46,642 INFO L87 Difference]: Start difference. First operand 298 states and 806 transitions. Second operand has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:03:47,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:47,109 INFO L93 Difference]: Finished difference Result 403 states and 1088 transitions. [2021-06-05 05:03:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:03:47,109 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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 18 [2021-06-05 05:03:47,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:47,109 INFO L225 Difference]: With dead ends: 403 [2021-06-05 05:03:47,109 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 05:03:47,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:03:47,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 05:03:47,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 300. [2021-06-05 05:03:47,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 05:03:47,113 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 18 [2021-06-05 05:03:47,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:47,113 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 05:03:47,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-06-05 05:03:47,113 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 05:03:47,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:47,116 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:47,116 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:47,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13978,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:47,329 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:47,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:47,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1160331542, now seen corresponding path program 419 times [2021-06-05 05:03:47,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:47,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198959119] [2021-06-05 05:03:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:47,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:47,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198959119] [2021-06-05 05:03:47,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198959119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:47,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348917792] [2021-06-05 05:03:47,414 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 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 [2021-06-05 05:03:47,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:47,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:47,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:47,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:47,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348917792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:47,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:47,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 05:03:47,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107121452] [2021-06-05 05:03:47,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:47,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:47,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:47,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:47,602 INFO L87 Difference]: Start difference. First operand 300 states and 809 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) [2021-06-05 05:03:47,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:47,966 INFO L93 Difference]: Finished difference Result 390 states and 1055 transitions. [2021-06-05 05:03:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:03:47,966 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 [2021-06-05 05:03:47,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:47,967 INFO L225 Difference]: With dead ends: 390 [2021-06-05 05:03:47,967 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 05:03:47,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 424.2ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 05:03:47,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 295. [2021-06-05 05:03:47,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.7176870748299318) internal successors, (799), 294 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:47,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 799 transitions. [2021-06-05 05:03:47,970 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 799 transitions. Word has length 19 [2021-06-05 05:03:47,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:47,970 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 799 transitions. [2021-06-05 05:03:47,970 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) [2021-06-05 05:03:47,970 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 799 transitions. [2021-06-05 05:03:47,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:47,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:47,970 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:48,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13995 [2021-06-05 05:03:48,171 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:48,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:48,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1541559239, now seen corresponding path program 420 times [2021-06-05 05:03:48,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:48,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301783016] [2021-06-05 05:03:48,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:48,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:48,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:48,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301783016] [2021-06-05 05:03:48,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301783016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:48,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925948557] [2021-06-05 05:03:48,260 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 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 [2021-06-05 05:03:48,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:03:48,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:48,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:48,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:48,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925948557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:48,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:48,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 05:03:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187347152] [2021-06-05 05:03:48,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:03:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:03:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:03:48,412 INFO L87 Difference]: Start difference. First operand 295 states and 799 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) [2021-06-05 05:03:48,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:48,673 INFO L93 Difference]: Finished difference Result 389 states and 1060 transitions. [2021-06-05 05:03:48,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:03:48,673 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 [2021-06-05 05:03:48,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:48,674 INFO L225 Difference]: With dead ends: 389 [2021-06-05 05:03:48,674 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 05:03:48,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 273.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:03:48,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 05:03:48,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 296. [2021-06-05 05:03:48,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.7186440677966104) internal successors, (802), 295 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:48,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 802 transitions. [2021-06-05 05:03:48,677 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 802 transitions. Word has length 19 [2021-06-05 05:03:48,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:48,677 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 802 transitions. [2021-06-05 05:03:48,677 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) [2021-06-05 05:03:48,677 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 802 transitions. [2021-06-05 05:03:48,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:48,678 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:48,678 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:48,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14001,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:48,878 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:48,878 INFO L82 PathProgramCache]: Analyzing trace with hash -839322326, now seen corresponding path program 421 times [2021-06-05 05:03:48,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:48,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101595361] [2021-06-05 05:03:48,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:48,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:48,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:48,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101595361] [2021-06-05 05:03:48,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101595361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:48,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572255991] [2021-06-05 05:03:48,966 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 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 [2021-06-05 05:03:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:48,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:48,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:49,312 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:03:49,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:49,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:49,316 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 15 treesize of output 11 [2021-06-05 05:03:49,316 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:49,351 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:03:49,353 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 [2021-06-05 05:03:49,354 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:49,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:49,367 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:49,368 INFO L518 ElimStorePlain]: Eliminatee v_prenex_414 vanished before elimination [2021-06-05 05:03:49,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:03:49,368 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:03:49,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:49,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572255991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:49,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:49,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:49,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520486358] [2021-06-05 05:03:49,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:49,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:49,397 INFO L87 Difference]: Start difference. First operand 296 states and 802 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) [2021-06-05 05:03:49,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:49,832 INFO L93 Difference]: Finished difference Result 390 states and 1056 transitions. [2021-06-05 05:03:49,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:03:49,832 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 [2021-06-05 05:03:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:49,833 INFO L225 Difference]: With dead ends: 390 [2021-06-05 05:03:49,833 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 05:03:49,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:49,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 05:03:49,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 297. [2021-06-05 05:03:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 05:03:49,836 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-06-05 05:03:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:49,836 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 05:03:49,836 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) [2021-06-05 05:03:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 05:03:49,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:49,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:49,836 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:50,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14004 [2021-06-05 05:03:50,037 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:50,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:50,037 INFO L82 PathProgramCache]: Analyzing trace with hash -625250165, now seen corresponding path program 422 times [2021-06-05 05:03:50,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:50,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532832289] [2021-06-05 05:03:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:50,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:50,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:50,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532832289] [2021-06-05 05:03:50,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532832289] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:50,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024086843] [2021-06-05 05:03:50,131 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 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 [2021-06-05 05:03:50,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:50,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:50,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:50,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:50,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:50,310 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 16 treesize of output 12 [2021-06-05 05:03:50,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,313 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:50,313 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 15 treesize of output 11 [2021-06-05 05:03:50,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,335 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:03:50,335 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:50,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:50,336 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:03:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:50,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024086843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:50,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:50,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:50,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229503800] [2021-06-05 05:03:50,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:50,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:50,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:50,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:50,358 INFO L87 Difference]: Start difference. First operand 297 states and 804 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) [2021-06-05 05:03:50,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:50,618 INFO L93 Difference]: Finished difference Result 338 states and 882 transitions. [2021-06-05 05:03:50,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:03:50,619 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 [2021-06-05 05:03:50,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:50,619 INFO L225 Difference]: With dead ends: 338 [2021-06-05 05:03:50,619 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 05:03:50,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:03:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 05:03:50,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 297. [2021-06-05 05:03:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.7162162162162162) internal successors, (804), 296 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:50,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 804 transitions. [2021-06-05 05:03:50,622 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 804 transitions. Word has length 19 [2021-06-05 05:03:50,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:50,622 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 804 transitions. [2021-06-05 05:03:50,622 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) [2021-06-05 05:03:50,622 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 804 transitions. [2021-06-05 05:03:50,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:50,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:50,623 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:50,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14021,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:50,823 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:50,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash 20163430, now seen corresponding path program 423 times [2021-06-05 05:03:50,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:50,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254562251] [2021-06-05 05:03:50,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:50,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:50,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:50,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254562251] [2021-06-05 05:03:50,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254562251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:50,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832385329] [2021-06-05 05:03:50,912 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 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 [2021-06-05 05:03:50,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:03:50,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:50,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:50,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:51,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:51,288 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:51,288 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 15 treesize of output 11 [2021-06-05 05:03:51,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:51,291 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:03:51,292 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:51,326 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:03:51,326 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:51,328 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 7 treesize of output 5 [2021-06-05 05:03:51,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:51,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:51,342 INFO L518 ElimStorePlain]: Eliminatee v_prenex_422 vanished before elimination [2021-06-05 05:03:51,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:03:51,343 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:03:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:51,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832385329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:51,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:51,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:51,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728241559] [2021-06-05 05:03:51,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:51,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:51,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:51,372 INFO L87 Difference]: Start difference. First operand 297 states and 804 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) [2021-06-05 05:03:51,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:51,854 INFO L93 Difference]: Finished difference Result 388 states and 1053 transitions. [2021-06-05 05:03:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:51,854 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 [2021-06-05 05:03:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:51,855 INFO L225 Difference]: With dead ends: 388 [2021-06-05 05:03:51,855 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 05:03:51,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 568.7ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:51,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 05:03:51,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 298. [2021-06-05 05:03:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 05:03:51,858 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 05:03:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:51,858 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 05:03:51,858 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) [2021-06-05 05:03:51,858 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 05:03:51,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:51,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:51,858 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:52,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14025,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:52,083 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:52,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:52,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1551089637, now seen corresponding path program 424 times [2021-06-05 05:03:52,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:52,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870607399] [2021-06-05 05:03:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:52,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:52,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870607399] [2021-06-05 05:03:52,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870607399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:52,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257487878] [2021-06-05 05:03:52,171 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 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 [2021-06-05 05:03:52,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:52,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:52,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:52,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:52,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:52,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:52,356 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 15 treesize of output 11 [2021-06-05 05:03:52,357 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:52,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:52,359 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 16 treesize of output 12 [2021-06-05 05:03:52,360 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:52,381 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:03:52,381 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:52,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:52,382 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:03:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:52,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257487878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:52,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:52,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:52,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406661135] [2021-06-05 05:03:52,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:52,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:52,404 INFO L87 Difference]: Start difference. First operand 298 states and 806 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) [2021-06-05 05:03:52,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:52,629 INFO L93 Difference]: Finished difference Result 335 states and 876 transitions. [2021-06-05 05:03:52,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:03:52,629 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 [2021-06-05 05:03:52,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:52,630 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:03:52,630 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 05:03:52,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 249.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:03:52,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 05:03:52,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 298. [2021-06-05 05:03:52,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:52,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 05:03:52,633 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 05:03:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:52,633 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 05:03:52,633 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) [2021-06-05 05:03:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 05:03:52,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:52,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:52,634 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:52,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14051,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:52,834 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:52,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1156267434, now seen corresponding path program 425 times [2021-06-05 05:03:52,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:52,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777324635] [2021-06-05 05:03:52,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:52,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:52,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:52,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777324635] [2021-06-05 05:03:52,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777324635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:52,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664372284] [2021-06-05 05:03:52,928 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 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 [2021-06-05 05:03:52,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:52,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:52,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:52,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:53,277 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:03:53,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:53,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:53,281 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 15 treesize of output 11 [2021-06-05 05:03:53,281 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:53,316 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:03:53,316 INFO L518 ElimStorePlain]: Eliminatee v_prenex_428 vanished before elimination [2021-06-05 05:03:53,318 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 [2021-06-05 05:03:53,319 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:53,333 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:53,333 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:53,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:03:53,334 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:03:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:53,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664372284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:53,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:53,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:53,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011703616] [2021-06-05 05:03:53,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:53,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:53,363 INFO L87 Difference]: Start difference. First operand 298 states and 806 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) [2021-06-05 05:03:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:53,834 INFO L93 Difference]: Finished difference Result 386 states and 1050 transitions. [2021-06-05 05:03:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:03:53,835 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 [2021-06-05 05:03:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:53,835 INFO L225 Difference]: With dead ends: 386 [2021-06-05 05:03:53,835 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 05:03:53,835 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 551.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:53,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 05:03:53,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 298. [2021-06-05 05:03:53,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.7138047138047137) internal successors, (806), 297 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:53,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 806 transitions. [2021-06-05 05:03:53,842 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 806 transitions. Word has length 19 [2021-06-05 05:03:53,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:53,842 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 806 transitions. [2021-06-05 05:03:53,842 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) [2021-06-05 05:03:53,842 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 806 transitions. [2021-06-05 05:03:53,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:53,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:53,843 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:54,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14055,429 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:54,057 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:54,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:54,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1898388811, now seen corresponding path program 426 times [2021-06-05 05:03:54,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:54,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764416440] [2021-06-05 05:03:54,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:54,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:54,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764416440] [2021-06-05 05:03:54,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764416440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:54,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852277328] [2021-06-05 05:03:54,149 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 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 [2021-06-05 05:03:54,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:03:54,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:54,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:54,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:54,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:54,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:54,342 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 [2021-06-05 05:03:54,342 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:54,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:54,345 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 15 treesize of output 11 [2021-06-05 05:03:54,345 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:54,366 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:03:54,366 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:54,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:03:54,367 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:03:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:54,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852277328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:54,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:54,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:54,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633289387] [2021-06-05 05:03:54,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:54,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:54,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:54,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:54,389 INFO L87 Difference]: Start difference. First operand 298 states and 806 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) [2021-06-05 05:03:54,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:54,606 INFO L93 Difference]: Finished difference Result 332 states and 870 transitions. [2021-06-05 05:03:54,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:03:54,606 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 [2021-06-05 05:03:54,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:54,607 INFO L225 Difference]: With dead ends: 332 [2021-06-05 05:03:54,607 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 05:03:54,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:03:54,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 05:03:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 299. [2021-06-05 05:03:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 2.7114093959731544) internal successors, (808), 298 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 808 transitions. [2021-06-05 05:03:54,610 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 808 transitions. Word has length 19 [2021-06-05 05:03:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:54,610 INFO L482 AbstractCegarLoop]: Abstraction has 299 states and 808 transitions. [2021-06-05 05:03:54,610 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) [2021-06-05 05:03:54,610 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 808 transitions. [2021-06-05 05:03:54,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:54,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:54,611 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:54,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14082,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:54,811 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:54,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:54,811 INFO L82 PathProgramCache]: Analyzing trace with hash 915821286, now seen corresponding path program 427 times [2021-06-05 05:03:54,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:54,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302574090] [2021-06-05 05:03:54,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:54,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:54,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302574090] [2021-06-05 05:03:54,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302574090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:54,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325652064] [2021-06-05 05:03:54,898 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 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 [2021-06-05 05:03:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:54,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:54,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:55,140 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 [2021-06-05 05:03:55,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:55,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:55,144 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 16 treesize of output 12 [2021-06-05 05:03:55,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:55,186 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:03:55,186 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:55,188 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 [2021-06-05 05:03:55,189 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:55,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:55,203 INFO L518 ElimStorePlain]: Eliminatee v_prenex_432 vanished before elimination [2021-06-05 05:03:55,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:03:55,204 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:03:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:55,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325652064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:55,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:55,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:55,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663712044] [2021-06-05 05:03:55,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:55,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:55,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:55,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:55,267 INFO L87 Difference]: Start difference. First operand 299 states and 808 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) [2021-06-05 05:03:56,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:56,414 INFO L93 Difference]: Finished difference Result 407 states and 1087 transitions. [2021-06-05 05:03:56,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:03:56,414 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 [2021-06-05 05:03:56,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:56,414 INFO L225 Difference]: With dead ends: 407 [2021-06-05 05:03:56,414 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 05:03:56,415 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 1097.4ms TimeCoverageRelationStatistics Valid=196, Invalid=994, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:03:56,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 05:03:56,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 301. [2021-06-05 05:03:56,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 05:03:56,418 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-06-05 05:03:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:56,418 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 05:03:56,418 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) [2021-06-05 05:03:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 05:03:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:56,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:56,421 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:56,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14086 [2021-06-05 05:03:56,637 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash 662666021, now seen corresponding path program 428 times [2021-06-05 05:03:56,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:56,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678269690] [2021-06-05 05:03:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:56,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:56,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:56,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:56,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678269690] [2021-06-05 05:03:56,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678269690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:56,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245649009] [2021-06-05 05:03:56,722 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 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 [2021-06-05 05:03:56,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:03:56,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:56,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:56,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:56,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:56,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:56,903 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 16 treesize of output 12 [2021-06-05 05:03:56,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:56,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:56,906 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 15 treesize of output 11 [2021-06-05 05:03:56,907 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:56,932 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:03:56,933 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:56,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:03:56,933 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:03:56,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:56,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245649009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:56,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:56,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:56,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160081790] [2021-06-05 05:03:56,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:56,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:56,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:56,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:56,982 INFO L87 Difference]: Start difference. First operand 301 states and 815 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) [2021-06-05 05:03:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:57,423 INFO L93 Difference]: Finished difference Result 357 states and 915 transitions. [2021-06-05 05:03:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:03:57,424 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 [2021-06-05 05:03:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:57,424 INFO L225 Difference]: With dead ends: 357 [2021-06-05 05:03:57,424 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 05:03:57,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 461.8ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:03:57,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 05:03:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 301. [2021-06-05 05:03:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 2.716666666666667) internal successors, (815), 300 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 815 transitions. [2021-06-05 05:03:57,427 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 815 transitions. Word has length 19 [2021-06-05 05:03:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:57,427 INFO L482 AbstractCegarLoop]: Abstraction has 301 states and 815 transitions. [2021-06-05 05:03:57,427 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) [2021-06-05 05:03:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 815 transitions. [2021-06-05 05:03:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:57,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:57,428 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:57,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14099,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:57,628 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:57,628 INFO L82 PathProgramCache]: Analyzing trace with hash 215328298, now seen corresponding path program 429 times [2021-06-05 05:03:57,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:57,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431899554] [2021-06-05 05:03:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:57,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:57,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431899554] [2021-06-05 05:03:57,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431899554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:57,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588641892] [2021-06-05 05:03:57,713 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 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 [2021-06-05 05:03:57,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:03:57,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:57,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:57,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:57,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:57,961 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 [2021-06-05 05:03:57,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,964 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:03:57,964 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:57,999 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:03:57,999 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:58,001 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 [2021-06-05 05:03:58,002 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:58,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:03:58,023 INFO L518 ElimStorePlain]: Eliminatee v_prenex_436 vanished before elimination [2021-06-05 05:03:58,023 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:03:58,024 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:03:58,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:58,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588641892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:58,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:58,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:58,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755133873] [2021-06-05 05:03:58,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:58,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:58,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:58,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:58,078 INFO L87 Difference]: Start difference. First operand 301 states and 815 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) [2021-06-05 05:03:58,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:58,603 INFO L93 Difference]: Finished difference Result 392 states and 1066 transitions. [2021-06-05 05:03:58,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:03:58,604 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 19 [2021-06-05 05:03:58,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:58,604 INFO L225 Difference]: With dead ends: 392 [2021-06-05 05:03:58,604 INFO L226 Difference]: Without dead ends: 392 [2021-06-05 05:03:58,604 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 540.3ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:03:58,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-06-05 05:03:58,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 300. [2021-06-05 05:03:58,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.7123745819397995) internal successors, (811), 299 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 811 transitions. [2021-06-05 05:03:58,607 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 811 transitions. Word has length 19 [2021-06-05 05:03:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:58,607 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 811 transitions. [2021-06-05 05:03:58,607 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) [2021-06-05 05:03:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 811 transitions. [2021-06-05 05:03:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:58,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:58,608 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:58,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14107 [2021-06-05 05:03:58,808 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:58,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:58,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1767468947, now seen corresponding path program 430 times [2021-06-05 05:03:58,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:58,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087503962] [2021-06-05 05:03:58,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:58,893 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:58,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:58,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087503962] [2021-06-05 05:03:58,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087503962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:58,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802336183] [2021-06-05 05:03:58,893 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 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 [2021-06-05 05:03:58,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:03:58,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:58,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:58,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:03:59,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:59,066 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:59,066 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 15 treesize of output 11 [2021-06-05 05:03:59,067 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:59,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:03:59,069 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 16 treesize of output 12 [2021-06-05 05:03:59,070 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:03:59,094 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:03:59,095 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:03:59,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:03:59,095 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:03:59,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:59,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802336183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:59,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:03:59,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:03:59,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452369585] [2021-06-05 05:03:59,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:03:59,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:03:59,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:03:59,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:03:59,161 INFO L87 Difference]: Start difference. First operand 300 states and 811 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) [2021-06-05 05:03:59,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:03:59,652 INFO L93 Difference]: Finished difference Result 334 states and 873 transitions. [2021-06-05 05:03:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:03:59,652 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 19 [2021-06-05 05:03:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:03:59,653 INFO L225 Difference]: With dead ends: 334 [2021-06-05 05:03:59,653 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 05:03:59,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 511.9ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:03:59,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 05:03:59,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 300. [2021-06-05 05:03:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.709030100334448) internal successors, (810), 299 states have internal predecessors, (810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:03:59,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 810 transitions. [2021-06-05 05:03:59,656 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 810 transitions. Word has length 19 [2021-06-05 05:03:59,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:03:59,656 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 810 transitions. [2021-06-05 05:03:59,656 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) [2021-06-05 05:03:59,656 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 810 transitions. [2021-06-05 05:03:59,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:03:59,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:03:59,656 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:03:59,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14124,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:03:59,857 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:03:59,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:03:59,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1475445976, now seen corresponding path program 431 times [2021-06-05 05:03:59,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:03:59,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414496174] [2021-06-05 05:03:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:03:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:03:59,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:03:59,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:03:59,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414496174] [2021-06-05 05:03:59,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414496174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:03:59,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063706716] [2021-06-05 05:03:59,940 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 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 [2021-06-05 05:03:59,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:03:59,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:03:59,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:03:59,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:00,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:00,255 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 15 treesize of output 11 [2021-06-05 05:04:00,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:00,258 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:00,258 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:00,295 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:00,296 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:00,298 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 [2021-06-05 05:04:00,299 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:00,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:00,312 INFO L518 ElimStorePlain]: Eliminatee v_prenex_441 vanished before elimination [2021-06-05 05:04:00,313 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:00,313 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:00,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063706716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:00,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:00,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:00,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838637070] [2021-06-05 05:04:00,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:00,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:00,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:00,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:00,342 INFO L87 Difference]: Start difference. First operand 300 states and 810 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) [2021-06-05 05:04:00,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:00,620 INFO L93 Difference]: Finished difference Result 319 states and 839 transitions. [2021-06-05 05:04:00,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:04:00,620 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 19 [2021-06-05 05:04:00,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:00,620 INFO L225 Difference]: With dead ends: 319 [2021-06-05 05:04:00,620 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 05:04:00,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 347.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:04:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 05:04:00,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 05:04:00,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 05:04:00,623 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-06-05 05:04:00,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:00,623 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 05:04:00,623 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) [2021-06-05 05:04:00,623 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 05:04:00,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:00,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:00,624 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:00,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14135,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:00,824 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:00,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:00,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1689518137, now seen corresponding path program 432 times [2021-06-05 05:04:00,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:00,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327585354] [2021-06-05 05:04:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:00,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:00,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:00,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327585354] [2021-06-05 05:04:00,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327585354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:00,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832314708] [2021-06-05 05:04:00,913 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 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 [2021-06-05 05:04:00,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:04:00,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:00,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:00,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:01,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:01,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:01,081 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 15 treesize of output 11 [2021-06-05 05:04:01,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:01,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:01,084 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 16 treesize of output 12 [2021-06-05 05:04:01,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:01,106 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:01,106 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:01,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:01,107 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:01,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:01,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832314708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:01,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:01,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:01,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795024277] [2021-06-05 05:04:01,129 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:01,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:01,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:01,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:01,129 INFO L87 Difference]: Start difference. First operand 300 states and 809 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) [2021-06-05 05:04:01,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:01,310 INFO L93 Difference]: Finished difference Result 323 states and 853 transitions. [2021-06-05 05:04:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:01,310 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 [2021-06-05 05:04:01,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:01,311 INFO L225 Difference]: With dead ends: 323 [2021-06-05 05:04:01,311 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 05:04:01,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 198.1ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:01,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 05:04:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 300. [2021-06-05 05:04:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.705685618729097) internal successors, (809), 299 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 809 transitions. [2021-06-05 05:04:01,314 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 809 transitions. Word has length 19 [2021-06-05 05:04:01,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:01,314 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 809 transitions. [2021-06-05 05:04:01,314 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) [2021-06-05 05:04:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 809 transitions. [2021-06-05 05:04:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:01,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:01,314 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:01,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14152,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:01,515 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:01,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:01,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1960035564, now seen corresponding path program 433 times [2021-06-05 05:04:01,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:01,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330178534] [2021-06-05 05:04:01,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:01,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:01,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:01,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:01,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330178534] [2021-06-05 05:04:01,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330178534] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:01,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716269508] [2021-06-05 05:04:01,606 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 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 [2021-06-05 05:04:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:01,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:01,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:01,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:01,931 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 15 treesize of output 11 [2021-06-05 05:04:01,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:01,934 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:01,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:01,969 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:01,969 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:01,971 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 [2021-06-05 05:04:01,972 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:01,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:01,988 INFO L518 ElimStorePlain]: Eliminatee v_prenex_447 vanished before elimination [2021-06-05 05:04:01,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:01,989 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:02,016 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:02,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716269508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:02,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:02,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:02,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093663732] [2021-06-05 05:04:02,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:02,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:02,017 INFO L87 Difference]: Start difference. First operand 300 states and 809 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) [2021-06-05 05:04:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:02,224 INFO L93 Difference]: Finished difference Result 316 states and 833 transitions. [2021-06-05 05:04:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:04:02,225 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 19 [2021-06-05 05:04:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:02,225 INFO L225 Difference]: With dead ends: 316 [2021-06-05 05:04:02,225 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 05:04:02,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 347.5ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:04:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 05:04:02,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 05:04:02,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:02,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-06-05 05:04:02,228 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-06-05 05:04:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:02,228 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-06-05 05:04:02,228 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) [2021-06-05 05:04:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-06-05 05:04:02,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:02,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:02,228 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:02,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14156,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:02,429 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:02,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:02,429 INFO L82 PathProgramCache]: Analyzing trace with hash -429109357, now seen corresponding path program 434 times [2021-06-05 05:04:02,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:02,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885567969] [2021-06-05 05:04:02,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:02,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:02,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885567969] [2021-06-05 05:04:02,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885567969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:02,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402612325] [2021-06-05 05:04:02,511 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 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 [2021-06-05 05:04:02,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:02,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:02,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:02,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,682 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 15 treesize of output 11 [2021-06-05 05:04:02,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:02,686 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 [2021-06-05 05:04:02,687 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,708 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:02,708 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:02,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:02,709 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:02,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:02,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402612325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:02,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:02,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:02,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074382545] [2021-06-05 05:04:02,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:02,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:02,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:02,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:02,731 INFO L87 Difference]: Start difference. First operand 300 states and 808 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) [2021-06-05 05:04:02,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:02,908 INFO L93 Difference]: Finished difference Result 339 states and 884 transitions. [2021-06-05 05:04:02,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:02,909 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 [2021-06-05 05:04:02,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:02,909 INFO L225 Difference]: With dead ends: 339 [2021-06-05 05:04:02,909 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 05:04:02,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 05:04:02,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 300. [2021-06-05 05:04:02,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.702341137123746) internal successors, (808), 299 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:02,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 808 transitions. [2021-06-05 05:04:02,912 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 808 transitions. Word has length 19 [2021-06-05 05:04:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:02,912 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 808 transitions. [2021-06-05 05:04:02,912 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) [2021-06-05 05:04:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 808 transitions. [2021-06-05 05:04:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:02,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:02,913 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:03,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14182 [2021-06-05 05:04:03,113 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:03,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:03,113 INFO L82 PathProgramCache]: Analyzing trace with hash -823931560, now seen corresponding path program 435 times [2021-06-05 05:04:03,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:03,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934396621] [2021-06-05 05:04:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:03,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:03,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934396621] [2021-06-05 05:04:03,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934396621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:03,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662456397] [2021-06-05 05:04:03,196 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 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 [2021-06-05 05:04:03,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:03,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:03,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:03,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:03,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:03,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:03,485 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 15 treesize of output 11 [2021-06-05 05:04:03,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:03,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:03,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:03,522 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:03,522 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:03,524 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 [2021-06-05 05:04:03,525 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:03,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:03,542 INFO L518 ElimStorePlain]: Eliminatee v_prenex_451 vanished before elimination [2021-06-05 05:04:03,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:03,543 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:03,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662456397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:03,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:03,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:03,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763771139] [2021-06-05 05:04:03,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:03,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:03,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:03,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:03,572 INFO L87 Difference]: Start difference. First operand 300 states and 808 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) [2021-06-05 05:04:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:03,857 INFO L93 Difference]: Finished difference Result 313 states and 827 transitions. [2021-06-05 05:04:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:04:03,858 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 19 [2021-06-05 05:04:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:03,858 INFO L225 Difference]: With dead ends: 313 [2021-06-05 05:04:03,858 INFO L226 Difference]: Without dead ends: 307 [2021-06-05 05:04:03,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 322.4ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:04:03,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-06-05 05:04:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 300. [2021-06-05 05:04:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:03,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 05:04:03,861 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 05:04:03,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:03,861 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 05:04:03,861 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) [2021-06-05 05:04:03,861 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 05:04:03,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:03,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:03,862 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:04,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14186,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:04,062 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:04,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:04,062 INFO L82 PathProgramCache]: Analyzing trace with hash -81810183, now seen corresponding path program 436 times [2021-06-05 05:04:04,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:04,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143033140] [2021-06-05 05:04:04,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:04,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143033140] [2021-06-05 05:04:04,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143033140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:04,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325392461] [2021-06-05 05:04:04,145 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 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 [2021-06-05 05:04:04,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:04,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:04,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:04,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:04,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:04,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:04,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:04:04,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:04,326 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:04,326 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 15 treesize of output 11 [2021-06-05 05:04:04,327 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:04,349 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:04,349 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:04,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:04,350 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:04,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325392461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:04,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:04,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:04,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674403199] [2021-06-05 05:04:04,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:04,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:04,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:04,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:04,371 INFO L87 Difference]: Start difference. First operand 300 states and 807 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) [2021-06-05 05:04:04,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:04,581 INFO L93 Difference]: Finished difference Result 335 states and 875 transitions. [2021-06-05 05:04:04,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:04,582 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 [2021-06-05 05:04:04,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:04,582 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:04:04,582 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 05:04:04,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:04,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 05:04:04,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 300. [2021-06-05 05:04:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:04,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 05:04:04,585 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 05:04:04,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:04,585 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 05:04:04,585 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) [2021-06-05 05:04:04,585 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 05:04:04,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:04,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:04,586 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:04,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14203,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:04,786 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:04,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:04,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1317532973, now seen corresponding path program 437 times [2021-06-05 05:04:04,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:04,787 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760918754] [2021-06-05 05:04:04,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:04,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760918754] [2021-06-05 05:04:04,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760918754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594837910] [2021-06-05 05:04:04,872 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 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 [2021-06-05 05:04:04,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:04,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:04,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:04,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:05,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:05,031 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 15 treesize of output 11 [2021-06-05 05:04:05,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:05,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:05,033 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 16 treesize of output 12 [2021-06-05 05:04:05,034 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:05,059 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:05,059 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:05,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:05,060 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:05,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:05,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594837910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:05,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:05,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:05,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996351533] [2021-06-05 05:04:05,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:05,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:05,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:05,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:05,104 INFO L87 Difference]: Start difference. First operand 300 states and 807 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) [2021-06-05 05:04:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:05,533 INFO L93 Difference]: Finished difference Result 354 states and 905 transitions. [2021-06-05 05:04:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:04:05,533 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 [2021-06-05 05:04:05,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:05,534 INFO L225 Difference]: With dead ends: 354 [2021-06-05 05:04:05,534 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 05:04:05,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:04:05,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 05:04:05,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 300. [2021-06-05 05:04:05,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:05,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 05:04:05,537 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 05:04:05,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:05,537 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 05:04:05,537 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) [2021-06-05 05:04:05,537 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 05:04:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:05,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:05,537 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:05,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14207 [2021-06-05 05:04:05,738 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:05,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1764870696, now seen corresponding path program 438 times [2021-06-05 05:04:05,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:05,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125876279] [2021-06-05 05:04:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:05,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:05,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:05,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125876279] [2021-06-05 05:04:05,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125876279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:05,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825818575] [2021-06-05 05:04:05,835 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 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 [2021-06-05 05:04:05,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:05,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:05,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:05,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:06,050 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 [2021-06-05 05:04:06,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:06,054 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 15 treesize of output 11 [2021-06-05 05:04:06,054 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,099 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:04:06,099 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:06,101 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 [2021-06-05 05:04:06,102 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:06,116 INFO L518 ElimStorePlain]: Eliminatee v_prenex_455 vanished before elimination [2021-06-05 05:04:06,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:06,117 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:06,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825818575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:06,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:06,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:06,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919074871] [2021-06-05 05:04:06,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:06,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:06,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:06,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:06,170 INFO L87 Difference]: Start difference. First operand 300 states and 807 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) [2021-06-05 05:04:06,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:06,381 INFO L93 Difference]: Finished difference Result 312 states and 828 transitions. [2021-06-05 05:04:06,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:04:06,382 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 [2021-06-05 05:04:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:06,382 INFO L225 Difference]: With dead ends: 312 [2021-06-05 05:04:06,382 INFO L226 Difference]: Without dead ends: 312 [2021-06-05 05:04:06,382 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:06,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2021-06-05 05:04:06,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 300. [2021-06-05 05:04:06,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 2.698996655518395) internal successors, (807), 299 states have internal predecessors, (807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 807 transitions. [2021-06-05 05:04:06,385 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 807 transitions. Word has length 19 [2021-06-05 05:04:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:06,385 INFO L482 AbstractCegarLoop]: Abstraction has 300 states and 807 transitions. [2021-06-05 05:04:06,385 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) [2021-06-05 05:04:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 807 transitions. [2021-06-05 05:04:06,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:06,386 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:06,386 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:06,586 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14215,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:06,586 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:06,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:06,586 INFO L82 PathProgramCache]: Analyzing trace with hash 547299355, now seen corresponding path program 439 times [2021-06-05 05:04:06,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:06,586 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470814556] [2021-06-05 05:04:06,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:06,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:06,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470814556] [2021-06-05 05:04:06,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470814556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:06,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689200003] [2021-06-05 05:04:06,668 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 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 [2021-06-05 05:04:06,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:06,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:06,830 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:06,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:06,831 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 15 treesize of output 11 [2021-06-05 05:04:06,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:06,834 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 16 treesize of output 12 [2021-06-05 05:04:06,835 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:06,859 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:06,859 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:06,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:06,860 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:06,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689200003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:06,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:06,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:06,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409242008] [2021-06-05 05:04:06,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:06,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:06,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:06,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:06,929 INFO L87 Difference]: Start difference. First operand 300 states and 807 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) [2021-06-05 05:04:07,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:07,378 INFO L93 Difference]: Finished difference Result 335 states and 872 transitions. [2021-06-05 05:04:07,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:04:07,378 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 [2021-06-05 05:04:07,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:07,378 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:04:07,378 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 05:04:07,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 439.2ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:04:07,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 05:04:07,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 296. [2021-06-05 05:04:07,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.705084745762712) internal successors, (798), 295 states have internal predecessors, (798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 798 transitions. [2021-06-05 05:04:07,381 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 798 transitions. Word has length 19 [2021-06-05 05:04:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:07,381 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 798 transitions. [2021-06-05 05:04:07,381 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) [2021-06-05 05:04:07,382 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 798 transitions. [2021-06-05 05:04:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:07,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:07,382 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:07,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14232,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:07,582 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:07,582 INFO L82 PathProgramCache]: Analyzing trace with hash 222503102, now seen corresponding path program 440 times [2021-06-05 05:04:07,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:07,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212720029] [2021-06-05 05:04:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:07,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:07,665 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212720029] [2021-06-05 05:04:07,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212720029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:07,665 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609720198] [2021-06-05 05:04:07,665 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 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 [2021-06-05 05:04:07,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:07,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:07,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:07,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:07,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:07,973 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:07,973 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 15 treesize of output 11 [2021-06-05 05:04:07,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:07,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:07,976 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:08,012 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:08,012 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:08,014 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 [2021-06-05 05:04:08,015 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:08,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:08,027 INFO L518 ElimStorePlain]: Eliminatee v_prenex_461 vanished before elimination [2021-06-05 05:04:08,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:08,028 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:08,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609720198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:08,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:08,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:08,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183688328] [2021-06-05 05:04:08,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:08,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:08,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:08,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:08,056 INFO L87 Difference]: Start difference. First operand 296 states and 798 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) [2021-06-05 05:04:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:08,646 INFO L93 Difference]: Finished difference Result 361 states and 898 transitions. [2021-06-05 05:04:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:04:08,646 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 19 [2021-06-05 05:04:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:08,647 INFO L225 Difference]: With dead ends: 361 [2021-06-05 05:04:08,647 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 05:04:08,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 597.3ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:04:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 05:04:08,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 302. [2021-06-05 05:04:08,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 2.6877076411960132) internal successors, (809), 301 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 809 transitions. [2021-06-05 05:04:08,650 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 809 transitions. Word has length 19 [2021-06-05 05:04:08,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:08,650 INFO L482 AbstractCegarLoop]: Abstraction has 302 states and 809 transitions. [2021-06-05 05:04:08,650 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) [2021-06-05 05:04:08,650 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 809 transitions. [2021-06-05 05:04:08,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:08,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:08,650 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:08,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14243,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:08,853 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:08,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:08,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1753429309, now seen corresponding path program 441 times [2021-06-05 05:04:08,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:08,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504268846] [2021-06-05 05:04:08,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:08,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504268846] [2021-06-05 05:04:08,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504268846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:08,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064374467] [2021-06-05 05:04:08,934 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 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 [2021-06-05 05:04:08,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:08,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:08,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:08,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:09,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:09,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:09,099 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 16 treesize of output 12 [2021-06-05 05:04:09,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:09,102 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:09,102 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 15 treesize of output 11 [2021-06-05 05:04:09,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:09,123 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:09,123 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:09,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:09,124 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:09,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:09,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064374467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:09,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:09,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:09,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605553630] [2021-06-05 05:04:09,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:09,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:09,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:09,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:09,145 INFO L87 Difference]: Start difference. First operand 302 states and 809 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) [2021-06-05 05:04:09,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:09,573 INFO L93 Difference]: Finished difference Result 442 states and 1075 transitions. [2021-06-05 05:04:09,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:04:09,574 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 [2021-06-05 05:04:09,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:09,574 INFO L225 Difference]: With dead ends: 442 [2021-06-05 05:04:09,574 INFO L226 Difference]: Without dead ends: 442 [2021-06-05 05:04:09,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 294.8ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:04:09,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2021-06-05 05:04:09,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 317. [2021-06-05 05:04:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.6962025316455698) internal successors, (852), 316 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:09,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 852 transitions. [2021-06-05 05:04:09,578 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 852 transitions. Word has length 19 [2021-06-05 05:04:09,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:09,578 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 852 transitions. [2021-06-05 05:04:09,578 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) [2021-06-05 05:04:09,578 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 852 transitions. [2021-06-05 05:04:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:09,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:09,578 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:09,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14269 [2021-06-05 05:04:09,781 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:09,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:09,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1358607106, now seen corresponding path program 442 times [2021-06-05 05:04:09,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:09,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174458944] [2021-06-05 05:04:09,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:09,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:09,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:09,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174458944] [2021-06-05 05:04:09,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174458944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:09,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965072887] [2021-06-05 05:04:09,859 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 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 [2021-06-05 05:04:09,885 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:09,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:09,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:09,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:10,124 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:10,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:10,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:10,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:04:10,128 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:10,162 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:10,162 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:10,164 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 [2021-06-05 05:04:10,165 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:10,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:10,178 INFO L518 ElimStorePlain]: Eliminatee v_prenex_465 vanished before elimination [2021-06-05 05:04:10,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:10,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:10,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965072887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:10,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:10,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:10,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339562283] [2021-06-05 05:04:10,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:10,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:10,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:10,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:10,206 INFO L87 Difference]: Start difference. First operand 317 states and 852 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) [2021-06-05 05:04:10,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:10,828 INFO L93 Difference]: Finished difference Result 370 states and 926 transitions. [2021-06-05 05:04:10,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:04:10,828 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 19 [2021-06-05 05:04:10,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:10,828 INFO L225 Difference]: With dead ends: 370 [2021-06-05 05:04:10,828 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 05:04:10,828 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 609.5ms TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:04:10,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 05:04:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 317. [2021-06-05 05:04:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 2.689873417721519) internal successors, (850), 316 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:10,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 850 transitions. [2021-06-05 05:04:10,832 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 850 transitions. Word has length 19 [2021-06-05 05:04:10,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:10,832 INFO L482 AbstractCegarLoop]: Abstraction has 317 states and 850 transitions. [2021-06-05 05:04:10,832 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) [2021-06-05 05:04:10,832 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 850 transitions. [2021-06-05 05:04:10,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:10,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:10,832 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:11,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14273,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:11,032 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:11,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:11,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2100728483, now seen corresponding path program 443 times [2021-06-05 05:04:11,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:11,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341360532] [2021-06-05 05:04:11,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:11,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:11,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341360532] [2021-06-05 05:04:11,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341360532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:11,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075876153] [2021-06-05 05:04:11,112 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 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 [2021-06-05 05:04:11,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:11,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:11,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:11,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:11,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,277 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 15 treesize of output 11 [2021-06-05 05:04:11,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:11,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:11,280 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 16 treesize of output 12 [2021-06-05 05:04:11,280 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:11,302 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:11,302 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:11,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:11,303 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:11,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:11,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075876153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:11,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:11,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:11,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752421102] [2021-06-05 05:04:11,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:11,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:11,324 INFO L87 Difference]: Start difference. First operand 317 states and 850 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) [2021-06-05 05:04:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:12,490 INFO L93 Difference]: Finished difference Result 437 states and 1062 transitions. [2021-06-05 05:04:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:04:12,490 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 [2021-06-05 05:04:12,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:12,491 INFO L225 Difference]: With dead ends: 437 [2021-06-05 05:04:12,491 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 05:04:12,491 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 1002.4ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:04:12,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 05:04:12,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 290. [2021-06-05 05:04:12,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 2.671280276816609) internal successors, (772), 289 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:12,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 772 transitions. [2021-06-05 05:04:12,494 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 772 transitions. Word has length 19 [2021-06-05 05:04:12,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:12,494 INFO L482 AbstractCegarLoop]: Abstraction has 290 states and 772 transitions. [2021-06-05 05:04:12,494 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) [2021-06-05 05:04:12,494 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 772 transitions. [2021-06-05 05:04:12,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:12,494 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:12,494 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:12,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14290 [2021-06-05 05:04:12,695 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:12,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:12,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1118160958, now seen corresponding path program 444 times [2021-06-05 05:04:12,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:12,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659819115] [2021-06-05 05:04:12,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:12,770 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:12,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:12,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659819115] [2021-06-05 05:04:12,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659819115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:12,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122611469] [2021-06-05 05:04:12,771 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 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 [2021-06-05 05:04:12,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:04:12,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:12,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:12,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:12,957 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 [2021-06-05 05:04:12,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:12,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:12,960 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 15 treesize of output 11 [2021-06-05 05:04:12,961 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:13,001 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:04:13,001 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:13,003 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 [2021-06-05 05:04:13,004 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:13,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:13,017 INFO L518 ElimStorePlain]: Eliminatee v_prenex_469 vanished before elimination [2021-06-05 05:04:13,018 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:13,018 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:13,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122611469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:13,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:13,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:13,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554711812] [2021-06-05 05:04:13,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:13,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:13,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:13,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:13,078 INFO L87 Difference]: Start difference. First operand 290 states and 772 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) [2021-06-05 05:04:13,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:13,905 INFO L93 Difference]: Finished difference Result 356 states and 890 transitions. [2021-06-05 05:04:13,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:04:13,906 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 19 [2021-06-05 05:04:13,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:13,906 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:04:13,906 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 05:04:13,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 771.4ms TimeCoverageRelationStatistics Valid=185, Invalid=1221, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:04:13,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 05:04:13,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 293. [2021-06-05 05:04:13,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-06-05 05:04:13,909 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-06-05 05:04:13,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:13,909 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-06-05 05:04:13,909 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) [2021-06-05 05:04:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-06-05 05:04:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:13,910 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:13,910 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:14,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 448 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14294 [2021-06-05 05:04:14,110 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:14,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:14,110 INFO L82 PathProgramCache]: Analyzing trace with hash 865005693, now seen corresponding path program 445 times [2021-06-05 05:04:14,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:14,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221414153] [2021-06-05 05:04:14,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:14,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221414153] [2021-06-05 05:04:14,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221414153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:14,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915367730] [2021-06-05 05:04:14,189 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 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 [2021-06-05 05:04:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:14,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:14,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:14,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:14,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:14,333 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 15 treesize of output 11 [2021-06-05 05:04:14,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:14,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:14,336 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 16 treesize of output 12 [2021-06-05 05:04:14,337 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:14,362 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:14,362 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:14,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:14,363 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:14,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:14,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915367730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:14,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:14,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:14,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170870052] [2021-06-05 05:04:14,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:14,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:14,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:14,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:14,408 INFO L87 Difference]: Start difference. First operand 293 states and 783 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) [2021-06-05 05:04:15,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:15,867 INFO L93 Difference]: Finished difference Result 496 states and 1175 transitions. [2021-06-05 05:04:15,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:04:15,867 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 [2021-06-05 05:04:15,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:15,868 INFO L225 Difference]: With dead ends: 496 [2021-06-05 05:04:15,868 INFO L226 Difference]: Without dead ends: 496 [2021-06-05 05:04:15,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1306.4ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:04:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-06-05 05:04:15,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 293. [2021-06-05 05:04:15,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6815068493150687) internal successors, (783), 292 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:15,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 783 transitions. [2021-06-05 05:04:15,871 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 783 transitions. Word has length 19 [2021-06-05 05:04:15,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:15,871 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 783 transitions. [2021-06-05 05:04:15,871 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) [2021-06-05 05:04:15,871 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 783 transitions. [2021-06-05 05:04:15,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:15,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:15,872 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:16,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 449 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14313 [2021-06-05 05:04:16,072 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:16,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:16,072 INFO L82 PathProgramCache]: Analyzing trace with hash 417667970, now seen corresponding path program 446 times [2021-06-05 05:04:16,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:16,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265990021] [2021-06-05 05:04:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:16,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:16,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265990021] [2021-06-05 05:04:16,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265990021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:16,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033371778] [2021-06-05 05:04:16,148 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 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 [2021-06-05 05:04:16,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:16,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:16,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:16,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:16,328 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 7 treesize of output 5 [2021-06-05 05:04:16,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:16,332 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 15 treesize of output 11 [2021-06-05 05:04:16,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,373 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:04:16,373 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:16,375 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 [2021-06-05 05:04:16,376 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:16,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:16,390 INFO L518 ElimStorePlain]: Eliminatee v_prenex_472 vanished before elimination [2021-06-05 05:04:16,391 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:16,391 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033371778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:16,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:16,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:16,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57399438] [2021-06-05 05:04:16,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:16,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:16,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:16,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:16,444 INFO L87 Difference]: Start difference. First operand 293 states and 783 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) [2021-06-05 05:04:16,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:16,958 INFO L93 Difference]: Finished difference Result 326 states and 842 transitions. [2021-06-05 05:04:16,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:04:16,958 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 [2021-06-05 05:04:16,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:16,958 INFO L225 Difference]: With dead ends: 326 [2021-06-05 05:04:16,958 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 05:04:16,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:04:16,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 05:04:16,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 291. [2021-06-05 05:04:16,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.6724137931034484) internal successors, (775), 290 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 775 transitions. [2021-06-05 05:04:16,961 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 775 transitions. Word has length 19 [2021-06-05 05:04:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:16,961 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 775 transitions. [2021-06-05 05:04:16,961 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) [2021-06-05 05:04:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 775 transitions. [2021-06-05 05:04:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:16,962 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:16,962 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:17,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14321,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:17,162 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:17,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:17,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1565129275, now seen corresponding path program 447 times [2021-06-05 05:04:17,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:17,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017476684] [2021-06-05 05:04:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:17,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:17,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017476684] [2021-06-05 05:04:17,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017476684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:17,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759030182] [2021-06-05 05:04:17,238 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 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 [2021-06-05 05:04:17,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:04:17,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:17,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:17,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:17,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:17,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:17,385 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 [2021-06-05 05:04:17,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:17,388 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 15 treesize of output 11 [2021-06-05 05:04:17,388 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:17,413 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:17,414 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:17,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:17,414 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:17,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759030182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:17,479 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:17,479 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:17,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337447418] [2021-06-05 05:04:17,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:17,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:17,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:17,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:17,479 INFO L87 Difference]: Start difference. First operand 291 states and 775 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) [2021-06-05 05:04:19,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:19,243 INFO L93 Difference]: Finished difference Result 433 states and 1057 transitions. [2021-06-05 05:04:19,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:04:19,244 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 [2021-06-05 05:04:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:19,244 INFO L225 Difference]: With dead ends: 433 [2021-06-05 05:04:19,244 INFO L226 Difference]: Without dead ends: 429 [2021-06-05 05:04:19,244 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1578.3ms TimeCoverageRelationStatistics Valid=388, Invalid=2918, Unknown=0, NotChecked=0, Total=3306 [2021-06-05 05:04:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-06-05 05:04:19,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 287. [2021-06-05 05:04:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.6783216783216783) internal successors, (766), 286 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 766 transitions. [2021-06-05 05:04:19,247 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 766 transitions. Word has length 19 [2021-06-05 05:04:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:19,247 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 766 transitions. [2021-06-05 05:04:19,248 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) [2021-06-05 05:04:19,248 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 766 transitions. [2021-06-05 05:04:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:19,248 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:19,248 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:19,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14338 [2021-06-05 05:04:19,448 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:19,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1896124392, now seen corresponding path program 448 times [2021-06-05 05:04:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:19,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562204515] [2021-06-05 05:04:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:19,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:19,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562204515] [2021-06-05 05:04:19,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562204515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:19,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801283742] [2021-06-05 05:04:19,536 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 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 [2021-06-05 05:04:19,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:19,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:19,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:19,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:19,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:19,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:19,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:19,780 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 15 treesize of output 11 [2021-06-05 05:04:19,780 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:19,814 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:19,815 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:19,817 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 [2021-06-05 05:04:19,817 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:19,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:19,830 INFO L518 ElimStorePlain]: Eliminatee v_prenex_476 vanished before elimination [2021-06-05 05:04:19,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:19,831 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:19,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801283742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:19,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:19,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:19,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250983576] [2021-06-05 05:04:19,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:19,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:19,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:19,858 INFO L87 Difference]: Start difference. First operand 287 states and 766 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) [2021-06-05 05:04:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:20,578 INFO L93 Difference]: Finished difference Result 422 states and 1037 transitions. [2021-06-05 05:04:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:04:20,578 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 19 [2021-06-05 05:04:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:20,579 INFO L225 Difference]: With dead ends: 422 [2021-06-05 05:04:20,579 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 05:04:20,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 577.8ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:04:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 05:04:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 316. [2021-06-05 05:04:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.7111111111111112) internal successors, (854), 315 states have internal predecessors, (854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:20,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 854 transitions. [2021-06-05 05:04:20,582 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 854 transitions. Word has length 19 [2021-06-05 05:04:20,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:20,582 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 854 transitions. [2021-06-05 05:04:20,582 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) [2021-06-05 05:04:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 854 transitions. [2021-06-05 05:04:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:20,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:20,582 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:20,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14349 [2021-06-05 05:04:20,797 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1154003015, now seen corresponding path program 449 times [2021-06-05 05:04:20,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:20,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651054345] [2021-06-05 05:04:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:20,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:20,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651054345] [2021-06-05 05:04:20,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651054345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:20,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629735824] [2021-06-05 05:04:20,872 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 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 [2021-06-05 05:04:20,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:20,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:20,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:20,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:21,034 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 16 treesize of output 12 [2021-06-05 05:04:21,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:21,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:21,037 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 15 treesize of output 11 [2021-06-05 05:04:21,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:21,059 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:21,059 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:21,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:21,059 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:21,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:21,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629735824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:21,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:21,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:21,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716278996] [2021-06-05 05:04:21,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:21,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:21,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:21,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:21,081 INFO L87 Difference]: Start difference. First operand 316 states and 854 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) [2021-06-05 05:04:21,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:21,658 INFO L93 Difference]: Finished difference Result 579 states and 1352 transitions. [2021-06-05 05:04:21,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:04:21,658 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 [2021-06-05 05:04:21,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:21,658 INFO L225 Difference]: With dead ends: 579 [2021-06-05 05:04:21,658 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 05:04:21,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 449.2ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:04:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 05:04:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 326. [2021-06-05 05:04:21,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.72) internal successors, (884), 325 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:21,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 884 transitions. [2021-06-05 05:04:21,662 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 884 transitions. Word has length 19 [2021-06-05 05:04:21,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:21,663 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 884 transitions. [2021-06-05 05:04:21,663 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) [2021-06-05 05:04:21,663 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 884 transitions. [2021-06-05 05:04:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:21,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:21,663 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:21,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14366,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:21,863 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:21,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:21,864 INFO L82 PathProgramCache]: Analyzing trace with hash -2136570540, now seen corresponding path program 450 times [2021-06-05 05:04:21,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:21,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740725803] [2021-06-05 05:04:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:21,944 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740725803] [2021-06-05 05:04:21,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740725803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:21,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258046031] [2021-06-05 05:04:21,944 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 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 [2021-06-05 05:04:21,999 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:21,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:22,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:22,150 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:22,150 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 16 treesize of output 12 [2021-06-05 05:04:22,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:22,153 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 [2021-06-05 05:04:22,154 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:22,194 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:04:22,194 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:22,196 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 [2021-06-05 05:04:22,197 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:22,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:22,211 INFO L518 ElimStorePlain]: Eliminatee v_prenex_479 vanished before elimination [2021-06-05 05:04:22,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:22,212 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:22,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:22,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258046031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:22,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:22,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:22,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707133941] [2021-06-05 05:04:22,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:22,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:22,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:22,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:22,272 INFO L87 Difference]: Start difference. First operand 326 states and 884 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) [2021-06-05 05:04:23,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:23,453 INFO L93 Difference]: Finished difference Result 585 states and 1337 transitions. [2021-06-05 05:04:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:04:23,453 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 19 [2021-06-05 05:04:23,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:23,454 INFO L225 Difference]: With dead ends: 585 [2021-06-05 05:04:23,454 INFO L226 Difference]: Without dead ends: 579 [2021-06-05 05:04:23,454 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 931.9ms TimeCoverageRelationStatistics Valid=285, Invalid=2367, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:04:23,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-06-05 05:04:23,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 333. [2021-06-05 05:04:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:23,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 05:04:23,458 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 05:04:23,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:23,458 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 05:04:23,458 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) [2021-06-05 05:04:23,458 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 05:04:23,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:23,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:23,458 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:23,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14370 [2021-06-05 05:04:23,659 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:23,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:23,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1905241491, now seen corresponding path program 451 times [2021-06-05 05:04:23,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:23,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598053059] [2021-06-05 05:04:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:23,741 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:23,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:23,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598053059] [2021-06-05 05:04:23,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598053059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:23,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213839941] [2021-06-05 05:04:23,741 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 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 [2021-06-05 05:04:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:23,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:23,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:23,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:04:23,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:23,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:23,889 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 [2021-06-05 05:04:23,890 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:23,914 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:23,915 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:23,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:23,915 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:23,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213839941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:23,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:23,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:23,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804593632] [2021-06-05 05:04:23,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:23,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:23,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:23,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:23,959 INFO L87 Difference]: Start difference. First operand 333 states and 908 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) [2021-06-05 05:04:25,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:25,426 INFO L93 Difference]: Finished difference Result 724 states and 1605 transitions. [2021-06-05 05:04:25,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:04:25,426 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 [2021-06-05 05:04:25,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:25,426 INFO L225 Difference]: With dead ends: 724 [2021-06-05 05:04:25,426 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 05:04:25,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1141.5ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:04:25,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 05:04:25,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 329. [2021-06-05 05:04:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.7195121951219514) internal successors, (892), 328 states have internal predecessors, (892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:25,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 892 transitions. [2021-06-05 05:04:25,431 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 892 transitions. Word has length 19 [2021-06-05 05:04:25,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:25,431 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 892 transitions. [2021-06-05 05:04:25,431 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) [2021-06-05 05:04:25,431 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 892 transitions. [2021-06-05 05:04:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:25,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:25,431 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:25,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14389 [2021-06-05 05:04:25,632 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:25,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:25,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1457903768, now seen corresponding path program 452 times [2021-06-05 05:04:25,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:25,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756043498] [2021-06-05 05:04:25,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:25,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:25,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756043498] [2021-06-05 05:04:25,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756043498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:25,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494217846] [2021-06-05 05:04:25,706 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 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 [2021-06-05 05:04:25,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:25,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:25,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:25,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:25,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:25,863 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 16 treesize of output 12 [2021-06-05 05:04:25,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,866 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 [2021-06-05 05:04:25,867 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,909 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:04:25,909 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:25,911 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 [2021-06-05 05:04:25,912 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:25,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:25,927 INFO L518 ElimStorePlain]: Eliminatee v_prenex_482 vanished before elimination [2021-06-05 05:04:25,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:25,928 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:25,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:25,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494217846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:25,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:25,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:25,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368158473] [2021-06-05 05:04:25,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:25,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:25,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:25,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:25,985 INFO L87 Difference]: Start difference. First operand 329 states and 892 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) [2021-06-05 05:04:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:26,569 INFO L93 Difference]: Finished difference Result 477 states and 1158 transitions. [2021-06-05 05:04:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:26,569 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 [2021-06-05 05:04:26,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:26,570 INFO L225 Difference]: With dead ends: 477 [2021-06-05 05:04:26,570 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 05:04:26,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:04:26,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 05:04:26,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 324. [2021-06-05 05:04:26,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-06-05 05:04:26,573 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-06-05 05:04:26,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:26,574 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-06-05 05:04:26,574 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) [2021-06-05 05:04:26,574 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-06-05 05:04:26,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:26,574 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:26,574 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:26,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14397,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:26,775 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:26,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:26,775 INFO L82 PathProgramCache]: Analyzing trace with hash -524893477, now seen corresponding path program 453 times [2021-06-05 05:04:26,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:26,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82856384] [2021-06-05 05:04:26,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:26,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:26,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:26,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:26,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82856384] [2021-06-05 05:04:26,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82856384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:26,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712612223] [2021-06-05 05:04:26,847 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 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 [2021-06-05 05:04:26,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:04:26,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:26,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:26,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:26,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:26,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:26,983 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 [2021-06-05 05:04:26,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:26,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:26,985 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 [2021-06-05 05:04:26,986 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:27,011 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:27,011 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:27,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:27,012 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:27,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712612223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:27,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:27,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:27,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677255143] [2021-06-05 05:04:27,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:27,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:27,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:27,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:27,079 INFO L87 Difference]: Start difference. First operand 324 states and 872 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) [2021-06-05 05:04:28,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:28,963 INFO L93 Difference]: Finished difference Result 649 states and 1474 transitions. [2021-06-05 05:04:28,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:04:28,963 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 [2021-06-05 05:04:28,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:28,963 INFO L225 Difference]: With dead ends: 649 [2021-06-05 05:04:28,963 INFO L226 Difference]: Without dead ends: 645 [2021-06-05 05:04:28,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1506 ImplicationChecksByTransitivity, 1533.4ms TimeCoverageRelationStatistics Valid=496, Invalid=4196, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:04:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-05 05:04:28,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 318. [2021-06-05 05:04:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.7003154574132493) internal successors, (856), 317 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 856 transitions. [2021-06-05 05:04:28,967 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 856 transitions. Word has length 19 [2021-06-05 05:04:28,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:28,967 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 856 transitions. [2021-06-05 05:04:28,967 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) [2021-06-05 05:04:28,967 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 856 transitions. [2021-06-05 05:04:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:28,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:28,968 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:29,168 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14408 [2021-06-05 05:04:29,168 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:29,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:29,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1548825218, now seen corresponding path program 454 times [2021-06-05 05:04:29,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:29,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068366740] [2021-06-05 05:04:29,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:29,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:29,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068366740] [2021-06-05 05:04:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068366740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:29,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188356135] [2021-06-05 05:04:29,244 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 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 [2021-06-05 05:04:29,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:29,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:29,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:29,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:29,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:29,363 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 15 treesize of output 11 [2021-06-05 05:04:29,364 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:29,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:29,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:29,367 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 16 treesize of output 12 [2021-06-05 05:04:29,368 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:29,370 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 [2021-06-05 05:04:29,371 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:29,373 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:29,373 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:29,405 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:04:29,406 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:29,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:29,406 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:04:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:29,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188356135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:29,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:29,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:29,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819004490] [2021-06-05 05:04:29,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:29,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:29,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:29,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:29,457 INFO L87 Difference]: Start difference. First operand 318 states and 856 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) [2021-06-05 05:04:30,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:30,169 INFO L93 Difference]: Finished difference Result 584 states and 1361 transitions. [2021-06-05 05:04:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:04:30,169 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 19 [2021-06-05 05:04:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:30,169 INFO L225 Difference]: With dead ends: 584 [2021-06-05 05:04:30,170 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 05:04:30,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:04:30,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 05:04:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 333. [2021-06-05 05:04:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 05:04:30,173 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 05:04:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:30,174 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 05:04:30,174 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) [2021-06-05 05:04:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 05:04:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:30,174 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:30,174 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:30,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14419,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:30,374 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:30,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:30,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1801980483, now seen corresponding path program 455 times [2021-06-05 05:04:30,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:30,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580030494] [2021-06-05 05:04:30,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:30,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:30,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580030494] [2021-06-05 05:04:30,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580030494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:30,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703934011] [2021-06-05 05:04:30,448 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 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 [2021-06-05 05:04:30,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:30,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:30,632 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:30,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:30,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:04:30,634 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:30,636 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 16 treesize of output 12 [2021-06-05 05:04:30,637 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:30,665 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:04:30,665 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:30,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:30,666 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:04:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:30,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703934011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:30,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:30,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:30,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776307004] [2021-06-05 05:04:30,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:30,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:30,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:30,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:30,709 INFO L87 Difference]: Start difference. First operand 333 states and 908 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) [2021-06-05 05:04:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:31,193 INFO L93 Difference]: Finished difference Result 542 states and 1292 transitions. [2021-06-05 05:04:31,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:04:31,193 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 [2021-06-05 05:04:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:31,194 INFO L225 Difference]: With dead ends: 542 [2021-06-05 05:04:31,194 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 05:04:31,194 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 438.3ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:04:31,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 05:04:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 333. [2021-06-05 05:04:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.7349397590361444) internal successors, (908), 332 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:31,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 908 transitions. [2021-06-05 05:04:31,198 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 908 transitions. Word has length 19 [2021-06-05 05:04:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:31,198 INFO L482 AbstractCegarLoop]: Abstraction has 333 states and 908 transitions. [2021-06-05 05:04:31,198 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) [2021-06-05 05:04:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 908 transitions. [2021-06-05 05:04:31,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:31,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:31,198 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:31,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14430,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:31,399 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:31,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:31,399 INFO L82 PathProgramCache]: Analyzing trace with hash 2045649090, now seen corresponding path program 456 times [2021-06-05 05:04:31,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:31,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435864421] [2021-06-05 05:04:31,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:31,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:31,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435864421] [2021-06-05 05:04:31,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435864421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398823640] [2021-06-05 05:04:31,476 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 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 [2021-06-05 05:04:31,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:31,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:31,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:31,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:31,594 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 [2021-06-05 05:04:31,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:31,597 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 [2021-06-05 05:04:31,598 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:31,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:31,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:31,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:04:31,602 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:31,604 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:31,604 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 15 treesize of output 11 [2021-06-05 05:04:31,604 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:31,638 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:04:31,638 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:31,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:31,639 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:04:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:31,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398823640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:31,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:31,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:31,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615462778] [2021-06-05 05:04:31,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:31,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:31,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:31,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:31,681 INFO L87 Difference]: Start difference. First operand 333 states and 908 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) [2021-06-05 05:04:32,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:32,105 INFO L93 Difference]: Finished difference Result 563 states and 1329 transitions. [2021-06-05 05:04:32,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:32,105 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 [2021-06-05 05:04:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:32,106 INFO L225 Difference]: With dead ends: 563 [2021-06-05 05:04:32,106 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 05:04:32,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:04:32,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 05:04:32,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 330. [2021-06-05 05:04:32,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.723404255319149) internal successors, (896), 329 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:32,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 896 transitions. [2021-06-05 05:04:32,110 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 896 transitions. Word has length 19 [2021-06-05 05:04:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:32,110 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 896 transitions. [2021-06-05 05:04:32,110 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) [2021-06-05 05:04:32,110 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 896 transitions. [2021-06-05 05:04:32,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:32,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:32,110 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:32,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14446,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:32,311 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:32,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:32,311 INFO L82 PathProgramCache]: Analyzing trace with hash 62851845, now seen corresponding path program 457 times [2021-06-05 05:04:32,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:32,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853110162] [2021-06-05 05:04:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:32,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:32,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:32,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853110162] [2021-06-05 05:04:32,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853110162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:32,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295459931] [2021-06-05 05:04:32,385 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 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 [2021-06-05 05:04:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:32,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:32,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:32,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:32,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:32,541 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 16 treesize of output 12 [2021-06-05 05:04:32,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:32,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:32,544 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 15 treesize of output 11 [2021-06-05 05:04:32,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:32,573 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:04:32,573 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:32,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:32,574 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:04:32,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:32,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295459931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:32,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:32,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:32,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116010283] [2021-06-05 05:04:32,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:32,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:32,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:32,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:32,642 INFO L87 Difference]: Start difference. First operand 330 states and 896 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) [2021-06-05 05:04:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:33,215 INFO L93 Difference]: Finished difference Result 529 states and 1260 transitions. [2021-06-05 05:04:33,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:04:33,215 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 [2021-06-05 05:04:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:33,216 INFO L225 Difference]: With dead ends: 529 [2021-06-05 05:04:33,216 INFO L226 Difference]: Without dead ends: 525 [2021-06-05 05:04:33,216 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 529.4ms TimeCoverageRelationStatistics Valid=151, Invalid=1109, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:04:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-06-05 05:04:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 327. [2021-06-05 05:04:33,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.7208588957055215) internal successors, (887), 326 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:33,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 887 transitions. [2021-06-05 05:04:33,220 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 887 transitions. Word has length 19 [2021-06-05 05:04:33,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:33,220 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 887 transitions. [2021-06-05 05:04:33,220 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) [2021-06-05 05:04:33,220 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 887 transitions. [2021-06-05 05:04:33,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:33,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:33,220 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:33,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14455 [2021-06-05 05:04:33,421 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:33,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:33,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1510419288, now seen corresponding path program 458 times [2021-06-05 05:04:33,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:33,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775192618] [2021-06-05 05:04:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:33,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:33,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775192618] [2021-06-05 05:04:33,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775192618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:33,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839068387] [2021-06-05 05:04:33,512 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 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 [2021-06-05 05:04:33,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:33,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:33,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:33,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:33,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:33,636 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 15 treesize of output 11 [2021-06-05 05:04:33,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:33,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:33,639 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 16 treesize of output 12 [2021-06-05 05:04:33,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:33,659 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:04:33,660 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:33,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:33,660 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:04:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:33,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839068387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:33,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:33,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:33,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910613880] [2021-06-05 05:04:33,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:33,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:33,682 INFO L87 Difference]: Start difference. First operand 327 states and 887 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) [2021-06-05 05:04:34,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:34,115 INFO L93 Difference]: Finished difference Result 519 states and 1238 transitions. [2021-06-05 05:04:34,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:04:34,116 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 [2021-06-05 05:04:34,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:34,116 INFO L225 Difference]: With dead ends: 519 [2021-06-05 05:04:34,116 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 05:04:34,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 309.9ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:04:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 05:04:34,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 323. [2021-06-05 05:04:34,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.7111801242236027) internal successors, (873), 322 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:34,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 873 transitions. [2021-06-05 05:04:34,120 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 873 transitions. Word has length 19 [2021-06-05 05:04:34,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:34,120 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 873 transitions. [2021-06-05 05:04:34,120 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) [2021-06-05 05:04:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 873 transitions. [2021-06-05 05:04:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:34,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:34,121 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:34,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14474,462 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:34,321 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1138563001, now seen corresponding path program 459 times [2021-06-05 05:04:34,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:34,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683741641] [2021-06-05 05:04:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:34,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:34,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:34,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:34,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683741641] [2021-06-05 05:04:34,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683741641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:34,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152337861] [2021-06-05 05:04:34,398 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 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 [2021-06-05 05:04:34,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:04:34,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:34,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:34,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:34,597 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 [2021-06-05 05:04:34,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:34,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:04:34,602 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,604 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 [2021-06-05 05:04:34,605 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:34,638 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:04:34,638 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:34,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:34,639 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:04:34,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:34,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152337861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:34,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:34,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:04:34,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888589060] [2021-06-05 05:04:34,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:34,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:34,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:34,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:34,667 INFO L87 Difference]: Start difference. First operand 323 states and 873 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) [2021-06-05 05:04:35,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:35,106 INFO L93 Difference]: Finished difference Result 460 states and 1121 transitions. [2021-06-05 05:04:35,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:04:35,106 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 [2021-06-05 05:04:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:35,107 INFO L225 Difference]: With dead ends: 460 [2021-06-05 05:04:35,107 INFO L226 Difference]: Without dead ends: 452 [2021-06-05 05:04:35,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 363.3ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:04:35,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-06-05 05:04:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 321. [2021-06-05 05:04:35,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:35,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-06-05 05:04:35,110 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-06-05 05:04:35,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:35,110 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-06-05 05:04:35,110 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) [2021-06-05 05:04:35,110 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-06-05 05:04:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:35,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:35,111 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:35,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 463 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14478 [2021-06-05 05:04:35,311 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:35,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:35,311 INFO L82 PathProgramCache]: Analyzing trace with hash 218819306, now seen corresponding path program 460 times [2021-06-05 05:04:35,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:35,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045890056] [2021-06-05 05:04:35,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:35,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:35,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:35,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045890056] [2021-06-05 05:04:35,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045890056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:35,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746278089] [2021-06-05 05:04:35,395 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 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 [2021-06-05 05:04:35,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:35,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:35,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:35,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:35,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:35,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:35,724 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 15 treesize of output 11 [2021-06-05 05:04:35,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:35,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,762 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:35,762 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:35,764 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 [2021-06-05 05:04:35,765 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:35,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:35,778 INFO L518 ElimStorePlain]: Eliminatee v_prenex_488 vanished before elimination [2021-06-05 05:04:35,778 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:35,778 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:35,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746278089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:35,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:35,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:35,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424238711] [2021-06-05 05:04:35,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:35,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:35,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:35,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:35,808 INFO L87 Difference]: Start difference. First operand 321 states and 865 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) [2021-06-05 05:04:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:36,060 INFO L93 Difference]: Finished difference Result 360 states and 930 transitions. [2021-06-05 05:04:36,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:04:36,060 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 [2021-06-05 05:04:36,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:36,061 INFO L225 Difference]: With dead ends: 360 [2021-06-05 05:04:36,061 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 05:04:36,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 382.1ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:04:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 05:04:36,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 322. [2021-06-05 05:04:36,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:36,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-06-05 05:04:36,064 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-06-05 05:04:36,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:36,064 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-06-05 05:04:36,064 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) [2021-06-05 05:04:36,064 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-06-05 05:04:36,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:36,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:36,064 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:36,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14491 [2021-06-05 05:04:36,265 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:36,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:36,265 INFO L82 PathProgramCache]: Analyzing trace with hash 432891467, now seen corresponding path program 461 times [2021-06-05 05:04:36,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:36,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048426632] [2021-06-05 05:04:36,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:36,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:36,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:36,354 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:36,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048426632] [2021-06-05 05:04:36,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048426632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:36,354 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804359469] [2021-06-05 05:04:36,354 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 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 [2021-06-05 05:04:36,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:36,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:36,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:36,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:36,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:36,533 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 16 treesize of output 12 [2021-06-05 05:04:36,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:36,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:36,536 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 15 treesize of output 11 [2021-06-05 05:04:36,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:36,557 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:36,557 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:36,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:36,558 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:36,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804359469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:36,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:36,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:36,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964882671] [2021-06-05 05:04:36,579 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:36,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:36,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:36,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:36,579 INFO L87 Difference]: Start difference. First operand 322 states and 867 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) [2021-06-05 05:04:36,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:36,800 INFO L93 Difference]: Finished difference Result 368 states and 958 transitions. [2021-06-05 05:04:36,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:04:36,800 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 [2021-06-05 05:04:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:36,801 INFO L225 Difference]: With dead ends: 368 [2021-06-05 05:04:36,801 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 05:04:36,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 236.1ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:04:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 05:04:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 322. [2021-06-05 05:04:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.7009345794392523) internal successors, (867), 321 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 867 transitions. [2021-06-05 05:04:36,804 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 867 transitions. Word has length 19 [2021-06-05 05:04:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:36,804 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 867 transitions. [2021-06-05 05:04:36,804 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) [2021-06-05 05:04:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 867 transitions. [2021-06-05 05:04:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:36,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:36,805 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:37,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14508,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:37,012 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:37,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:37,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1078305062, now seen corresponding path program 462 times [2021-06-05 05:04:37,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:37,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100284175] [2021-06-05 05:04:37,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:37,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:37,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:37,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100284175] [2021-06-05 05:04:37,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100284175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:37,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793732206] [2021-06-05 05:04:37,096 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 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 [2021-06-05 05:04:37,127 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:04:37,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:37,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:37,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:37,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:37,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:37,420 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 15 treesize of output 11 [2021-06-05 05:04:37,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:37,423 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:37,423 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:37,458 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:37,458 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:37,460 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 [2021-06-05 05:04:37,461 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:37,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:37,473 INFO L518 ElimStorePlain]: Eliminatee v_prenex_493 vanished before elimination [2021-06-05 05:04:37,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:37,474 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:37,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:37,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793732206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:37,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:37,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:37,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419801470] [2021-06-05 05:04:37,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:37,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:37,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:37,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:37,502 INFO L87 Difference]: Start difference. First operand 322 states and 867 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) [2021-06-05 05:04:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:37,807 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-06-05 05:04:37,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:04:37,807 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 [2021-06-05 05:04:37,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:37,807 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:04:37,807 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 05:04:37,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 404.8ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:04:37,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 05:04:37,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 323. [2021-06-05 05:04:37,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:37,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 05:04:37,811 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 05:04:37,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:37,811 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 05:04:37,811 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) [2021-06-05 05:04:37,811 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 05:04:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:37,811 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:37,811 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:38,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14512 [2021-06-05 05:04:38,012 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:38,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1685736027, now seen corresponding path program 463 times [2021-06-05 05:04:38,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:38,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087976290] [2021-06-05 05:04:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,095 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:38,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:38,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087976290] [2021-06-05 05:04:38,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087976290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:38,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895165198] [2021-06-05 05:04:38,095 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 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 [2021-06-05 05:04:38,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:38,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:38,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:38,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:38,282 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:38,282 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 16 treesize of output 12 [2021-06-05 05:04:38,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:38,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:38,285 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 15 treesize of output 11 [2021-06-05 05:04:38,285 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:38,306 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:38,306 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:38,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:38,306 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:38,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:38,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895165198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:38,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:38,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:38,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689478516] [2021-06-05 05:04:38,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:38,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:38,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:38,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:38,328 INFO L87 Difference]: Start difference. First operand 323 states and 869 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) [2021-06-05 05:04:38,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:38,762 INFO L93 Difference]: Finished difference Result 407 states and 1037 transitions. [2021-06-05 05:04:38,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:04:38,762 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 [2021-06-05 05:04:38,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:38,763 INFO L225 Difference]: With dead ends: 407 [2021-06-05 05:04:38,763 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 05:04:38,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 454.0ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:04:38,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 05:04:38,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 323. [2021-06-05 05:04:38,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:38,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 05:04:38,766 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 05:04:38,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:38,766 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 05:04:38,766 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) [2021-06-05 05:04:38,766 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 05:04:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:38,766 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:38,766 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:38,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14539,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:38,967 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:38,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:38,967 INFO L82 PathProgramCache]: Analyzing trace with hash -2080558230, now seen corresponding path program 464 times [2021-06-05 05:04:38,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:38,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762347598] [2021-06-05 05:04:38,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:39,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762347598] [2021-06-05 05:04:39,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762347598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587079757] [2021-06-05 05:04:39,051 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 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 [2021-06-05 05:04:39,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:39,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:39,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:39,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:39,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:39,386 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 15 treesize of output 11 [2021-06-05 05:04:39,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,388 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:39,389 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,425 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:39,425 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:39,427 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 [2021-06-05 05:04:39,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:39,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:39,441 INFO L518 ElimStorePlain]: Eliminatee v_prenex_499 vanished before elimination [2021-06-05 05:04:39,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:39,441 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:39,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587079757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:39,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:39,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:39,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349241184] [2021-06-05 05:04:39,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:39,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:39,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:39,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:39,470 INFO L87 Difference]: Start difference. First operand 323 states and 869 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) [2021-06-05 05:04:39,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:39,828 INFO L93 Difference]: Finished difference Result 352 states and 918 transitions. [2021-06-05 05:04:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:04:39,828 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 [2021-06-05 05:04:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:39,829 INFO L225 Difference]: With dead ends: 352 [2021-06-05 05:04:39,829 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 05:04:39,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:04:39,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 05:04:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 323. [2021-06-05 05:04:39,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.698757763975155) internal successors, (869), 322 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:39,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 869 transitions. [2021-06-05 05:04:39,832 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 869 transitions. Word has length 19 [2021-06-05 05:04:39,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:39,832 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 869 transitions. [2021-06-05 05:04:39,832 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) [2021-06-05 05:04:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 869 transitions. [2021-06-05 05:04:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:39,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:39,832 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:40,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14543 [2021-06-05 05:04:40,033 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:40,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:40,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1338436853, now seen corresponding path program 465 times [2021-06-05 05:04:40,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:40,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144358481] [2021-06-05 05:04:40,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:40,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:40,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:40,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144358481] [2021-06-05 05:04:40,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144358481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054788206] [2021-06-05 05:04:40,117 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 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 [2021-06-05 05:04:40,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:04:40,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:40,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:40,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:40,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:40,309 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 [2021-06-05 05:04:40,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:40,312 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 15 treesize of output 11 [2021-06-05 05:04:40,312 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,333 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:40,334 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:40,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:40,334 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054788206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:40,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:40,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:40,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685591886] [2021-06-05 05:04:40,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:40,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:40,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:40,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:40,356 INFO L87 Difference]: Start difference. First operand 323 states and 869 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) [2021-06-05 05:04:41,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:41,343 INFO L93 Difference]: Finished difference Result 427 states and 1076 transitions. [2021-06-05 05:04:41,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:41,343 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 [2021-06-05 05:04:41,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:41,344 INFO L225 Difference]: With dead ends: 427 [2021-06-05 05:04:41,344 INFO L226 Difference]: Without dead ends: 427 [2021-06-05 05:04:41,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 796.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:04:41,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-06-05 05:04:41,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 324. [2021-06-05 05:04:41,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.696594427244582) internal successors, (871), 323 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:41,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 871 transitions. [2021-06-05 05:04:41,347 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 871 transitions. Word has length 19 [2021-06-05 05:04:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:41,347 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 871 transitions. [2021-06-05 05:04:41,347 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) [2021-06-05 05:04:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 871 transitions. [2021-06-05 05:04:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:41,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:41,348 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:41,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14569,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:41,548 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:41,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1973962918, now seen corresponding path program 466 times [2021-06-05 05:04:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:41,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451152936] [2021-06-05 05:04:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:41,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:41,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451152936] [2021-06-05 05:04:41,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451152936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:41,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965549337] [2021-06-05 05:04:41,629 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 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 [2021-06-05 05:04:41,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:41,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:41,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:41,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:41,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:41,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:41,833 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 [2021-06-05 05:04:41,833 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:41,835 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 [2021-06-05 05:04:41,836 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:41,876 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:04:41,876 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:41,878 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 [2021-06-05 05:04:41,879 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:41,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:41,893 INFO L518 ElimStorePlain]: Eliminatee v_prenex_502 vanished before elimination [2021-06-05 05:04:41,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:41,893 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:41,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965549337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:41,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:41,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:41,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194057671] [2021-06-05 05:04:41,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:41,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:41,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:41,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:41,958 INFO L87 Difference]: Start difference. First operand 324 states and 871 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) [2021-06-05 05:04:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:42,673 INFO L93 Difference]: Finished difference Result 387 states and 978 transitions. [2021-06-05 05:04:42,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:42,673 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 [2021-06-05 05:04:42,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:42,674 INFO L225 Difference]: With dead ends: 387 [2021-06-05 05:04:42,674 INFO L226 Difference]: Without dead ends: 381 [2021-06-05 05:04:42,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 631.4ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:04:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2021-06-05 05:04:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 326. [2021-06-05 05:04:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:42,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-06-05 05:04:42,677 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-06-05 05:04:42,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:42,677 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-06-05 05:04:42,677 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) [2021-06-05 05:04:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-06-05 05:04:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:42,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:42,677 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:42,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14573,470 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:42,878 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:42,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:42,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1720807653, now seen corresponding path program 467 times [2021-06-05 05:04:42,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:42,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885047439] [2021-06-05 05:04:42,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:42,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:42,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885047439] [2021-06-05 05:04:42,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885047439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:42,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343959710] [2021-06-05 05:04:42,958 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 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 [2021-06-05 05:04:42,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:42,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:42,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:42,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:43,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:43,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:43,140 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 15 treesize of output 11 [2021-06-05 05:04:43,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:43,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:43,143 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 16 treesize of output 12 [2021-06-05 05:04:43,144 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:43,169 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:43,169 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:43,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:43,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:43,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:43,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343959710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:43,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:43,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:43,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551133171] [2021-06-05 05:04:43,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:43,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:43,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:43,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:43,215 INFO L87 Difference]: Start difference. First operand 326 states and 878 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) [2021-06-05 05:04:44,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:44,251 INFO L93 Difference]: Finished difference Result 451 states and 1113 transitions. [2021-06-05 05:04:44,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:44,252 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 [2021-06-05 05:04:44,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:44,252 INFO L225 Difference]: With dead ends: 451 [2021-06-05 05:04:44,252 INFO L226 Difference]: Without dead ends: 451 [2021-06-05 05:04:44,252 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 920.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:04:44,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2021-06-05 05:04:44,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 326. [2021-06-05 05:04:44,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.7015384615384614) internal successors, (878), 325 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 878 transitions. [2021-06-05 05:04:44,256 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 878 transitions. Word has length 19 [2021-06-05 05:04:44,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:44,256 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 878 transitions. [2021-06-05 05:04:44,256 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) [2021-06-05 05:04:44,256 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 878 transitions. [2021-06-05 05:04:44,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:44,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:44,256 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:44,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14586,471 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:44,457 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:44,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:44,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1273469930, now seen corresponding path program 468 times [2021-06-05 05:04:44,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:44,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331905101] [2021-06-05 05:04:44,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:44,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:44,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:44,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331905101] [2021-06-05 05:04:44,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331905101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:44,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617945233] [2021-06-05 05:04:44,541 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 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 [2021-06-05 05:04:44,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:44,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:44,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:44,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:44,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:44,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:44,759 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 [2021-06-05 05:04:44,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:44,762 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:44,763 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:44,799 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:04:44,799 INFO L518 ElimStorePlain]: Eliminatee v_prenex_505 vanished before elimination [2021-06-05 05:04:44,801 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 [2021-06-05 05:04:44,802 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:44,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:44,816 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:44,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:44,817 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:44,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617945233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:44,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:44,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:44,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694727288] [2021-06-05 05:04:44,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:44,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:44,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:44,872 INFO L87 Difference]: Start difference. First operand 326 states and 878 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) [2021-06-05 05:04:45,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:45,210 INFO L93 Difference]: Finished difference Result 357 states and 936 transitions. [2021-06-05 05:04:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:04:45,210 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 [2021-06-05 05:04:45,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:45,211 INFO L225 Difference]: With dead ends: 357 [2021-06-05 05:04:45,211 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 05:04:45,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 365.0ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:04:45,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 05:04:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 325. [2021-06-05 05:04:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.697530864197531) internal successors, (874), 324 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:45,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 874 transitions. [2021-06-05 05:04:45,214 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 874 transitions. Word has length 19 [2021-06-05 05:04:45,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:45,214 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 874 transitions. [2021-06-05 05:04:45,214 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) [2021-06-05 05:04:45,214 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 874 transitions. [2021-06-05 05:04:45,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:45,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:45,215 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:45,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14594,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:45,415 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash -709327315, now seen corresponding path program 469 times [2021-06-05 05:04:45,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:45,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471608451] [2021-06-05 05:04:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:45,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471608451] [2021-06-05 05:04:45,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471608451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625945385] [2021-06-05 05:04:45,498 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 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 [2021-06-05 05:04:45,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:45,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:45,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:45,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,672 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,673 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 15 treesize of output 11 [2021-06-05 05:04:45,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,675 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:45,676 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 16 treesize of output 12 [2021-06-05 05:04:45,676 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:45,701 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:45,701 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:45,702 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:45,702 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:45,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625945385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:45,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:45,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:04:45,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82083858] [2021-06-05 05:04:45,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:04:45,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:45,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:04:45,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:04:45,768 INFO L87 Difference]: Start difference. First operand 325 states and 874 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) [2021-06-05 05:04:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:46,966 INFO L93 Difference]: Finished difference Result 400 states and 1019 transitions. [2021-06-05 05:04:46,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:04:46,966 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 [2021-06-05 05:04:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:46,967 INFO L225 Difference]: With dead ends: 400 [2021-06-05 05:04:46,967 INFO L226 Difference]: Without dead ends: 396 [2021-06-05 05:04:46,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1118.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1589, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:04:46,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-06-05 05:04:46,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 321. [2021-06-05 05:04:46,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.703125) internal successors, (865), 320 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 865 transitions. [2021-06-05 05:04:46,970 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 865 transitions. Word has length 19 [2021-06-05 05:04:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:46,970 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 865 transitions. [2021-06-05 05:04:46,970 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) [2021-06-05 05:04:46,970 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 865 transitions. [2021-06-05 05:04:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:46,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:46,971 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:47,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14605,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:47,171 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:47,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:47,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2094901658, now seen corresponding path program 470 times [2021-06-05 05:04:47,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:47,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482151682] [2021-06-05 05:04:47,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:47,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:47,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482151682] [2021-06-05 05:04:47,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482151682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:47,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465762783] [2021-06-05 05:04:47,241 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 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 [2021-06-05 05:04:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:47,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:47,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:47,538 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 [2021-06-05 05:04:47,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,541 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:47,542 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,576 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:47,576 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:47,578 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 [2021-06-05 05:04:47,578 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:47,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:47,591 INFO L518 ElimStorePlain]: Eliminatee v_prenex_510 vanished before elimination [2021-06-05 05:04:47,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:47,592 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:47,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:47,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465762783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:47,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:47,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:47,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218414227] [2021-06-05 05:04:47,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:47,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:47,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:47,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:47,619 INFO L87 Difference]: Start difference. First operand 321 states and 865 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) [2021-06-05 05:04:47,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:47,910 INFO L93 Difference]: Finished difference Result 356 states and 924 transitions. [2021-06-05 05:04:47,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:04:47,910 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 [2021-06-05 05:04:47,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:47,910 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:04:47,910 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 05:04:47,911 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:04:47,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 05:04:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 321. [2021-06-05 05:04:47,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.696875) internal successors, (863), 320 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 863 transitions. [2021-06-05 05:04:47,914 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 863 transitions. Word has length 19 [2021-06-05 05:04:47,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:47,914 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 863 transitions. [2021-06-05 05:04:47,914 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) [2021-06-05 05:04:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 863 transitions. [2021-06-05 05:04:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:47,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:47,914 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:48,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14616 [2021-06-05 05:04:48,114 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:48,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:48,115 INFO L82 PathProgramCache]: Analyzing trace with hash -563975451, now seen corresponding path program 471 times [2021-06-05 05:04:48,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:48,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658433433] [2021-06-05 05:04:48,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:48,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:48,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658433433] [2021-06-05 05:04:48,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658433433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495545303] [2021-06-05 05:04:48,183 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 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 [2021-06-05 05:04:48,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:04:48,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:48,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:48,348 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:48,348 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 15 treesize of output 11 [2021-06-05 05:04:48,349 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:48,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:48,351 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 16 treesize of output 12 [2021-06-05 05:04:48,352 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:48,373 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:48,373 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:48,373 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:48,373 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:48,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:48,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495545303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:48,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:48,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376734821] [2021-06-05 05:04:48,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:48,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:48,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:48,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:48,394 INFO L87 Difference]: Start difference. First operand 321 states and 863 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) [2021-06-05 05:04:48,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:48,653 INFO L93 Difference]: Finished difference Result 416 states and 1055 transitions. [2021-06-05 05:04:48,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:04:48,653 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 [2021-06-05 05:04:48,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:48,654 INFO L225 Difference]: With dead ends: 416 [2021-06-05 05:04:48,654 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 05:04:48,654 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:04:48,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 05:04:48,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 324. [2021-06-05 05:04:48,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.6996904024767803) internal successors, (872), 323 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:48,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 872 transitions. [2021-06-05 05:04:48,657 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 872 transitions. Word has length 19 [2021-06-05 05:04:48,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:48,657 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 872 transitions. [2021-06-05 05:04:48,657 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) [2021-06-05 05:04:48,657 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 872 transitions. [2021-06-05 05:04:48,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:48,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:48,658 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:48,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14643,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:48,858 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:48,859 INFO L82 PathProgramCache]: Analyzing trace with hash -958797654, now seen corresponding path program 472 times [2021-06-05 05:04:48,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:48,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503738814] [2021-06-05 05:04:48,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:48,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:48,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503738814] [2021-06-05 05:04:48,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503738814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:48,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738573036] [2021-06-05 05:04:48,927 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 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 [2021-06-05 05:04:48,954 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:48,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:48,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:48,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:49,228 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:49,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:49,231 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:49,231 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 [2021-06-05 05:04:49,232 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:49,266 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:49,266 INFO L518 ElimStorePlain]: Eliminatee v_prenex_516 vanished before elimination [2021-06-05 05:04:49,268 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 [2021-06-05 05:04:49,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:49,282 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:49,282 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:49,283 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:49,283 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:49,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:49,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738573036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:49,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:49,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:49,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580573938] [2021-06-05 05:04:49,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:49,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:49,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:49,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:49,310 INFO L87 Difference]: Start difference. First operand 324 states and 872 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) [2021-06-05 05:04:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:49,643 INFO L93 Difference]: Finished difference Result 356 states and 927 transitions. [2021-06-05 05:04:49,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:04:49,644 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 [2021-06-05 05:04:49,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:49,644 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:04:49,644 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 05:04:49,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 380.7ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:04:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 05:04:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 324. [2021-06-05 05:04:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:49,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-06-05 05:04:49,648 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-06-05 05:04:49,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:49,648 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-06-05 05:04:49,648 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) [2021-06-05 05:04:49,648 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-06-05 05:04:49,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:49,648 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:49,648 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:49,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14647 [2021-06-05 05:04:49,849 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:49,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:49,849 INFO L82 PathProgramCache]: Analyzing trace with hash -216676277, now seen corresponding path program 473 times [2021-06-05 05:04:49,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:49,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115211123] [2021-06-05 05:04:49,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:49,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:49,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115211123] [2021-06-05 05:04:49,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115211123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:49,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214382234] [2021-06-05 05:04:49,918 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 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 [2021-06-05 05:04:49,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:04:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:49,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:50,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:50,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:50,096 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 15 treesize of output 11 [2021-06-05 05:04:50,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:50,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:50,099 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 16 treesize of output 12 [2021-06-05 05:04:50,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:50,121 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:50,121 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:50,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:50,122 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:50,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214382234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:50,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:50,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:50,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852838427] [2021-06-05 05:04:50,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:50,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:50,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:50,143 INFO L87 Difference]: Start difference. First operand 324 states and 870 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) [2021-06-05 05:04:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:50,626 INFO L93 Difference]: Finished difference Result 507 states and 1242 transitions. [2021-06-05 05:04:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:04:50,627 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 [2021-06-05 05:04:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:50,627 INFO L225 Difference]: With dead ends: 507 [2021-06-05 05:04:50,627 INFO L226 Difference]: Without dead ends: 507 [2021-06-05 05:04:50,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:04:50,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-06-05 05:04:50,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 324. [2021-06-05 05:04:50,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.693498452012384) internal successors, (870), 323 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:50,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 870 transitions. [2021-06-05 05:04:50,631 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 870 transitions. Word has length 19 [2021-06-05 05:04:50,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:50,631 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 870 transitions. [2021-06-05 05:04:50,631 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) [2021-06-05 05:04:50,631 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 870 transitions. [2021-06-05 05:04:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:50,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:50,631 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:50,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14673,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:50,832 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:50,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:50,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1199243802, now seen corresponding path program 474 times [2021-06-05 05:04:50,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:50,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405600304] [2021-06-05 05:04:50,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:50,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:50,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:50,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405600304] [2021-06-05 05:04:50,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405600304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:50,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733910698] [2021-06-05 05:04:50,899 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 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 [2021-06-05 05:04:50,927 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:50,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:50,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:51,082 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 [2021-06-05 05:04:51,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:51,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:51,086 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 [2021-06-05 05:04:51,087 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:51,127 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:04:51,127 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:51,129 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 [2021-06-05 05:04:51,130 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:51,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:51,143 INFO L518 ElimStorePlain]: Eliminatee v_prenex_519 vanished before elimination [2021-06-05 05:04:51,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:51,144 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:51,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:51,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733910698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:51,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:51,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:51,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231940373] [2021-06-05 05:04:51,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:51,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:51,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:51,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:51,208 INFO L87 Difference]: Start difference. First operand 324 states and 870 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) [2021-06-05 05:04:51,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:51,916 INFO L93 Difference]: Finished difference Result 406 states and 1019 transitions. [2021-06-05 05:04:51,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:04:51,916 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 [2021-06-05 05:04:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:51,917 INFO L225 Difference]: With dead ends: 406 [2021-06-05 05:04:51,917 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 05:04:51,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:04:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 05:04:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 327. [2021-06-05 05:04:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:51,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-06-05 05:04:51,920 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-06-05 05:04:51,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:51,920 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-06-05 05:04:51,920 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) [2021-06-05 05:04:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-06-05 05:04:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:51,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:51,921 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:52,121 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14677 [2021-06-05 05:04:52,121 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:52,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:52,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1452399067, now seen corresponding path program 475 times [2021-06-05 05:04:52,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:52,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655370805] [2021-06-05 05:04:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:52,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:52,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:52,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655370805] [2021-06-05 05:04:52,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655370805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:52,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572264784] [2021-06-05 05:04:52,190 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 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 [2021-06-05 05:04:52,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:52,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:52,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,346 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 [2021-06-05 05:04:52,347 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:52,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:04:52,349 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:52,374 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:52,375 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:52,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:52,375 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:52,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572264784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:52,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:52,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:52,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803085293] [2021-06-05 05:04:52,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:52,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:52,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:52,419 INFO L87 Difference]: Start difference. First operand 327 states and 880 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) [2021-06-05 05:04:53,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:53,259 INFO L93 Difference]: Finished difference Result 578 states and 1379 transitions. [2021-06-05 05:04:53,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:04:53,260 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 [2021-06-05 05:04:53,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:53,260 INFO L225 Difference]: With dead ends: 578 [2021-06-05 05:04:53,260 INFO L226 Difference]: Without dead ends: 572 [2021-06-05 05:04:53,260 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 741.4ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:04:53,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2021-06-05 05:04:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 327. [2021-06-05 05:04:53,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.6993865030674846) internal successors, (880), 326 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 880 transitions. [2021-06-05 05:04:53,264 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 880 transitions. Word has length 19 [2021-06-05 05:04:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:53,264 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 880 transitions. [2021-06-05 05:04:53,264 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) [2021-06-05 05:04:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 880 transitions. [2021-06-05 05:04:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:53,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:53,265 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:53,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14690,479 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:53,465 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1899736790, now seen corresponding path program 476 times [2021-06-05 05:04:53,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:53,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785397430] [2021-06-05 05:04:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:53,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:53,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:53,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:53,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785397430] [2021-06-05 05:04:53,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785397430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:53,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676251434] [2021-06-05 05:04:53,534 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 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 [2021-06-05 05:04:53,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:04:53,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:53,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:53,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:53,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:53,730 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 16 treesize of output 12 [2021-06-05 05:04:53,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,733 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 [2021-06-05 05:04:53,734 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,774 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:04:53,775 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:53,777 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 [2021-06-05 05:04:53,778 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:53,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:53,792 INFO L518 ElimStorePlain]: Eliminatee v_prenex_522 vanished before elimination [2021-06-05 05:04:53,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:53,793 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676251434] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:53,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:53,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:53,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161405384] [2021-06-05 05:04:53,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:53,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:53,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:53,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:53,850 INFO L87 Difference]: Start difference. First operand 327 states and 880 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) [2021-06-05 05:04:54,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:54,286 INFO L93 Difference]: Finished difference Result 376 states and 969 transitions. [2021-06-05 05:04:54,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:04:54,286 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 19 [2021-06-05 05:04:54,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:54,287 INFO L225 Difference]: With dead ends: 376 [2021-06-05 05:04:54,287 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 05:04:54,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:04:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 05:04:54,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 325. [2021-06-05 05:04:54,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.691358024691358) internal successors, (872), 324 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 872 transitions. [2021-06-05 05:04:54,290 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 872 transitions. Word has length 19 [2021-06-05 05:04:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:54,290 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 872 transitions. [2021-06-05 05:04:54,290 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) [2021-06-05 05:04:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 872 transitions. [2021-06-05 05:04:54,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:54,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:54,291 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:54,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14698 [2021-06-05 05:04:54,491 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:54,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:54,491 INFO L82 PathProgramCache]: Analyzing trace with hash 412433261, now seen corresponding path program 477 times [2021-06-05 05:04:54,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:54,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280831561] [2021-06-05 05:04:54,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:54,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:54,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280831561] [2021-06-05 05:04:54,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280831561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:54,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158189628] [2021-06-05 05:04:54,559 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 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 [2021-06-05 05:04:54,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:04:54,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:54,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:54,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:54,717 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:54,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:54,718 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 15 treesize of output 11 [2021-06-05 05:04:54,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:54,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:54,721 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 16 treesize of output 12 [2021-06-05 05:04:54,722 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:54,746 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:04:54,747 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:54,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:54,747 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:04:54,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:54,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158189628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:54,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:54,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:54,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116362196] [2021-06-05 05:04:54,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:54,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:54,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:54,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:54,812 INFO L87 Difference]: Start difference. First operand 325 states and 872 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) [2021-06-05 05:04:55,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:55,814 INFO L93 Difference]: Finished difference Result 494 states and 1225 transitions. [2021-06-05 05:04:55,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:04:55,814 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 19 [2021-06-05 05:04:55,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:55,815 INFO L225 Difference]: With dead ends: 494 [2021-06-05 05:04:55,815 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 05:04:55,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 929.6ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:04:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 05:04:55,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 321. [2021-06-05 05:04:55,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.69375) internal successors, (862), 320 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 862 transitions. [2021-06-05 05:04:55,818 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 862 transitions. Word has length 19 [2021-06-05 05:04:55,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:55,819 INFO L482 AbstractCegarLoop]: Abstraction has 321 states and 862 transitions. [2021-06-05 05:04:55,819 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) [2021-06-05 05:04:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 862 transitions. [2021-06-05 05:04:55,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:55,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:55,819 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:56,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14715,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:56,019 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:56,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:56,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2030990486, now seen corresponding path program 478 times [2021-06-05 05:04:56,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:56,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457349144] [2021-06-05 05:04:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:56,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:56,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457349144] [2021-06-05 05:04:56,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457349144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:56,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308484204] [2021-06-05 05:04:56,090 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 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 [2021-06-05 05:04:56,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:04:56,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:56,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:56,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:56,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:56,384 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:56,384 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 15 treesize of output 11 [2021-06-05 05:04:56,385 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:56,387 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:04:56,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:56,422 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:04:56,425 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 [2021-06-05 05:04:56,425 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:56,443 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:56,443 INFO L518 ElimStorePlain]: Eliminatee v_prenex_528 vanished before elimination [2021-06-05 05:04:56,443 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:56,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:04:56,445 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:04:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:56,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308484204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:56,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:56,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:56,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325165428] [2021-06-05 05:04:56,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:56,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:56,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:56,475 INFO L87 Difference]: Start difference. First operand 321 states and 862 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) [2021-06-05 05:04:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:57,001 INFO L93 Difference]: Finished difference Result 392 states and 990 transitions. [2021-06-05 05:04:57,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:04:57,002 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 [2021-06-05 05:04:57,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:57,002 INFO L225 Difference]: With dead ends: 392 [2021-06-05 05:04:57,002 INFO L226 Difference]: Without dead ends: 380 [2021-06-05 05:04:57,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 519.4ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:04:57,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-06-05 05:04:57,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 329. [2021-06-05 05:04:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.6951219512195124) internal successors, (884), 328 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 884 transitions. [2021-06-05 05:04:57,005 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 884 transitions. Word has length 19 [2021-06-05 05:04:57,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:57,006 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 884 transitions. [2021-06-05 05:04:57,006 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) [2021-06-05 05:04:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 884 transitions. [2021-06-05 05:04:57,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:57,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:57,006 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:57,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14726 [2021-06-05 05:04:57,206 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:57,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:57,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1288869109, now seen corresponding path program 479 times [2021-06-05 05:04:57,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:57,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681135934] [2021-06-05 05:04:57,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:57,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:57,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:57,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681135934] [2021-06-05 05:04:57,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681135934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:57,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066428891] [2021-06-05 05:04:57,278 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 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 [2021-06-05 05:04:57,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:04:57,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:57,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:57,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:57,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:57,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:57,444 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 16 treesize of output 12 [2021-06-05 05:04:57,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:57,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:57,447 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 15 treesize of output 11 [2021-06-05 05:04:57,447 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:57,468 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:04:57,468 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:57,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:04:57,469 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:04:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:57,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066428891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:57,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:57,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:57,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075118432] [2021-06-05 05:04:57,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:57,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:57,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:57,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:57,490 INFO L87 Difference]: Start difference. First operand 329 states and 884 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) [2021-06-05 05:04:57,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:57,867 INFO L93 Difference]: Finished difference Result 466 states and 1147 transitions. [2021-06-05 05:04:57,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:04:57,868 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 [2021-06-05 05:04:57,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:57,868 INFO L225 Difference]: With dead ends: 466 [2021-06-05 05:04:57,868 INFO L226 Difference]: Without dead ends: 466 [2021-06-05 05:04:57,868 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:04:57,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-06-05 05:04:57,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 330. [2021-06-05 05:04:57,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.6990881458966567) internal successors, (888), 329 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:57,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 888 transitions. [2021-06-05 05:04:57,872 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 888 transitions. Word has length 19 [2021-06-05 05:04:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:57,872 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 888 transitions. [2021-06-05 05:04:57,872 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) [2021-06-05 05:04:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 888 transitions. [2021-06-05 05:04:57,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:57,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:57,872 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:58,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14752,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:04:58,073 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:58,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2023530662, now seen corresponding path program 480 times [2021-06-05 05:04:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:58,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471204858] [2021-06-05 05:04:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:58,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471204858] [2021-06-05 05:04:58,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471204858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:58,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678639156] [2021-06-05 05:04:58,140 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 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 [2021-06-05 05:04:58,168 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:04:58,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:04:58,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:58,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:04:58,313 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 [2021-06-05 05:04:58,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:04:58,316 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 15 treesize of output 11 [2021-06-05 05:04:58,317 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,359 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:04:58,359 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:04:58,361 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 [2021-06-05 05:04:58,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:04:58,377 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:04:58,377 INFO L518 ElimStorePlain]: Eliminatee v_prenex_531 vanished before elimination [2021-06-05 05:04:58,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:04:58,380 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:04:58,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:58,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678639156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:58,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:04:58,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:04:58,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735482813] [2021-06-05 05:04:58,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:04:58,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:04:58,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:04:58,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:04:58,440 INFO L87 Difference]: Start difference. First operand 330 states and 888 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) [2021-06-05 05:04:59,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:04:59,585 INFO L93 Difference]: Finished difference Result 537 states and 1234 transitions. [2021-06-05 05:04:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:04:59,585 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 [2021-06-05 05:04:59,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:04:59,586 INFO L225 Difference]: With dead ends: 537 [2021-06-05 05:04:59,586 INFO L226 Difference]: Without dead ends: 531 [2021-06-05 05:04:59,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1017.5ms TimeCoverageRelationStatistics Valid=294, Invalid=2058, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:04:59,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-06-05 05:04:59,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 336. [2021-06-05 05:04:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:04:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-06-05 05:04:59,590 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-06-05 05:04:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:04:59,590 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-06-05 05:04:59,590 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) [2021-06-05 05:04:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-06-05 05:04:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:04:59,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:04:59,590 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:04:59,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14756 [2021-06-05 05:04:59,790 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:04:59,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:04:59,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1770375397, now seen corresponding path program 481 times [2021-06-05 05:04:59,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:04:59,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033949297] [2021-06-05 05:04:59,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:04:59,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:04:59,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:04:59,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033949297] [2021-06-05 05:04:59,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033949297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:04:59,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846707066] [2021-06-05 05:04:59,859 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 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 [2021-06-05 05:04:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:04:59,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:04:59,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:00,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:00,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:00,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:00,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:00,007 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 15 treesize of output 11 [2021-06-05 05:05:00,007 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:00,032 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:00,032 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:00,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:00,033 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:00,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846707066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:00,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:00,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:00,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578443268] [2021-06-05 05:05:00,075 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:00,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:00,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:00,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:00,075 INFO L87 Difference]: Start difference. First operand 336 states and 910 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) [2021-06-05 05:05:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:00,630 INFO L93 Difference]: Finished difference Result 569 states and 1330 transitions. [2021-06-05 05:05:00,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:00,630 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 [2021-06-05 05:05:00,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:00,631 INFO L225 Difference]: With dead ends: 569 [2021-06-05 05:05:00,631 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 05:05:00,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 504.7ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:05:00,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 05:05:00,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 336. [2021-06-05 05:05:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.716417910447761) internal successors, (910), 335 states have internal predecessors, (910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 910 transitions. [2021-06-05 05:05:00,635 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 910 transitions. Word has length 19 [2021-06-05 05:05:00,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:00,635 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 910 transitions. [2021-06-05 05:05:00,635 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) [2021-06-05 05:05:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 910 transitions. [2021-06-05 05:05:00,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:00,635 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:00,635 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:00,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14775,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:00,836 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:00,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:00,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1323037674, now seen corresponding path program 482 times [2021-06-05 05:05:00,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:00,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950635160] [2021-06-05 05:05:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:00,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:00,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:00,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950635160] [2021-06-05 05:05:00,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950635160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:00,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878729304] [2021-06-05 05:05:00,904 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 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 [2021-06-05 05:05:00,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:00,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:00,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:00,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:01,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:01,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:01,082 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 15 treesize of output 11 [2021-06-05 05:05:01,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:01,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:01,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:01,120 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:05:01,120 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:01,122 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 [2021-06-05 05:05:01,123 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:01,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:01,137 INFO L518 ElimStorePlain]: Eliminatee v_prenex_533 vanished before elimination [2021-06-05 05:05:01,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:01,138 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:05:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:01,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878729304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:01,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:01,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:01,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935736386] [2021-06-05 05:05:01,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:01,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:01,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:01,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:01,188 INFO L87 Difference]: Start difference. First operand 336 states and 910 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) [2021-06-05 05:05:01,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:01,734 INFO L93 Difference]: Finished difference Result 428 states and 1071 transitions. [2021-06-05 05:05:01,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:05:01,734 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 19 [2021-06-05 05:05:01,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:01,735 INFO L225 Difference]: With dead ends: 428 [2021-06-05 05:05:01,735 INFO L226 Difference]: Without dead ends: 428 [2021-06-05 05:05:01,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:05:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-06-05 05:05:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 332. [2021-06-05 05:05:01,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.700906344410876) internal successors, (894), 331 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:01,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 894 transitions. [2021-06-05 05:05:01,738 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 894 transitions. Word has length 19 [2021-06-05 05:05:01,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:01,738 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 894 transitions. [2021-06-05 05:05:01,738 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) [2021-06-05 05:05:01,738 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 894 transitions. [2021-06-05 05:05:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:01,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:01,739 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:01,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14783,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:01,939 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:01,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:01,939 INFO L82 PathProgramCache]: Analyzing trace with hash -659759571, now seen corresponding path program 483 times [2021-06-05 05:05:01,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:01,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485727596] [2021-06-05 05:05:01,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:01,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:02,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:02,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:02,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485727596] [2021-06-05 05:05:02,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485727596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:02,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821204592] [2021-06-05 05:05:02,006 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 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 [2021-06-05 05:05:02,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:05:02,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:02,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:02,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:02,153 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:02,154 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:02,154 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 15 treesize of output 11 [2021-06-05 05:05:02,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:02,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:02,157 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 16 treesize of output 12 [2021-06-05 05:05:02,157 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:02,182 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:02,182 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:02,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:02,183 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:02,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:02,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821204592] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:02,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:02,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:02,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039564833] [2021-06-05 05:05:02,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:02,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:02,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:02,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:02,251 INFO L87 Difference]: Start difference. First operand 332 states and 894 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) [2021-06-05 05:05:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:03,112 INFO L93 Difference]: Finished difference Result 524 states and 1244 transitions. [2021-06-05 05:05:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:05:03,112 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 19 [2021-06-05 05:05:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:03,112 INFO L225 Difference]: With dead ends: 524 [2021-06-05 05:05:03,113 INFO L226 Difference]: Without dead ends: 520 [2021-06-05 05:05:03,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 757.3ms TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:05:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2021-06-05 05:05:03,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 329. [2021-06-05 05:05:03,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 2.701219512195122) internal successors, (886), 328 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:03,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 886 transitions. [2021-06-05 05:05:03,117 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 886 transitions. Word has length 19 [2021-06-05 05:05:03,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:03,117 INFO L482 AbstractCegarLoop]: Abstraction has 329 states and 886 transitions. [2021-06-05 05:05:03,117 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) [2021-06-05 05:05:03,117 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 886 transitions. [2021-06-05 05:05:03,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:03,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:03,118 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:03,318 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14800,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:03,318 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:03,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:03,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1683691312, now seen corresponding path program 484 times [2021-06-05 05:05:03,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:03,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253352761] [2021-06-05 05:05:03,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:03,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:03,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:03,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253352761] [2021-06-05 05:05:03,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253352761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:03,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826813778] [2021-06-05 05:05:03,396 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 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 [2021-06-05 05:05:03,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:03,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:03,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:03,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:03,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:03,526 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 16 treesize of output 12 [2021-06-05 05:05:03,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:03,530 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 15 treesize of output 11 [2021-06-05 05:05:03,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:03,532 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:03,533 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:03,535 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 [2021-06-05 05:05:03,536 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:03,571 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:05:03,571 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:03,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:03,572 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826813778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:03,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:03,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791446532] [2021-06-05 05:05:03,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:03,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:03,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:03,621 INFO L87 Difference]: Start difference. First operand 329 states and 886 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) [2021-06-05 05:05:05,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:05,127 INFO L93 Difference]: Finished difference Result 638 states and 1467 transitions. [2021-06-05 05:05:05,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:05:05,127 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 [2021-06-05 05:05:05,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:05,127 INFO L225 Difference]: With dead ends: 638 [2021-06-05 05:05:05,127 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 05:05:05,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1167 ImplicationChecksByTransitivity, 1363.5ms TimeCoverageRelationStatistics Valid=460, Invalid=3322, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:05:05,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 05:05:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 343. [2021-06-05 05:05:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.7339181286549707) internal successors, (935), 342 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 935 transitions. [2021-06-05 05:05:05,132 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 935 transitions. Word has length 19 [2021-06-05 05:05:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:05,132 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 935 transitions. [2021-06-05 05:05:05,132 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) [2021-06-05 05:05:05,132 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 935 transitions. [2021-06-05 05:05:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:05,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:05,132 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:05,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14811 [2021-06-05 05:05:05,333 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:05,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:05,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1936846577, now seen corresponding path program 485 times [2021-06-05 05:05:05,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:05,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664823871] [2021-06-05 05:05:05,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:05,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:05,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664823871] [2021-06-05 05:05:05,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664823871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:05,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371507524] [2021-06-05 05:05:05,402 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 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 [2021-06-05 05:05:05,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:05:05,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:05,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:05,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:05,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:05,562 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 16 treesize of output 12 [2021-06-05 05:05:05,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:05,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:05,565 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 15 treesize of output 11 [2021-06-05 05:05:05,565 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:05,594 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:05:05,594 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:05,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:05,595 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:05:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:05,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371507524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:05,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:05,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068037951] [2021-06-05 05:05:05,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:05,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:05,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:05,641 INFO L87 Difference]: Start difference. First operand 343 states and 935 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) [2021-06-05 05:05:06,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:06,226 INFO L93 Difference]: Finished difference Result 481 states and 1167 transitions. [2021-06-05 05:05:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:05:06,226 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 [2021-06-05 05:05:06,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:06,226 INFO L225 Difference]: With dead ends: 481 [2021-06-05 05:05:06,226 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 05:05:06,227 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 535.8ms TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:05:06,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 05:05:06,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 340. [2021-06-05 05:05:06,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.7227138643067845) internal successors, (923), 339 states have internal predecessors, (923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 923 transitions. [2021-06-05 05:05:06,230 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 923 transitions. Word has length 19 [2021-06-05 05:05:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:06,230 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 923 transitions. [2021-06-05 05:05:06,230 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) [2021-06-05 05:05:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 923 transitions. [2021-06-05 05:05:06,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:06,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:06,230 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:06,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14823,489 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:06,431 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:06,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:06,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1910782996, now seen corresponding path program 486 times [2021-06-05 05:05:06,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:06,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855384977] [2021-06-05 05:05:06,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:06,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855384977] [2021-06-05 05:05:06,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855384977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:06,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641514558] [2021-06-05 05:05:06,503 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 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 [2021-06-05 05:05:06,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:05:06,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:06,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,657 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,658 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 15 treesize of output 11 [2021-06-05 05:05:06,658 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:06,661 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 16 treesize of output 12 [2021-06-05 05:05:06,662 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,664 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 [2021-06-05 05:05:06,665 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,667 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:06,667 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:06,700 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:05:06,700 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:06,701 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:06,701 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:06,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641514558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:06,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:06,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:06,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380623944] [2021-06-05 05:05:06,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:06,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:06,743 INFO L87 Difference]: Start difference. First operand 340 states and 923 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) [2021-06-05 05:05:07,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:07,583 INFO L93 Difference]: Finished difference Result 546 states and 1309 transitions. [2021-06-05 05:05:07,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:05:07,583 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 19 [2021-06-05 05:05:07,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:07,584 INFO L225 Difference]: With dead ends: 546 [2021-06-05 05:05:07,584 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 05:05:07,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 800.9ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:05:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 05:05:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 331. [2021-06-05 05:05:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.687878787878788) internal successors, (887), 330 states have internal predecessors, (887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 887 transitions. [2021-06-05 05:05:07,588 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 887 transitions. Word has length 19 [2021-06-05 05:05:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:07,588 INFO L482 AbstractCegarLoop]: Abstraction has 331 states and 887 transitions. [2021-06-05 05:05:07,588 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) [2021-06-05 05:05:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 887 transitions. [2021-06-05 05:05:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:07,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:07,588 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:07,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14833 [2021-06-05 05:05:07,789 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:07,789 INFO L82 PathProgramCache]: Analyzing trace with hash -72014249, now seen corresponding path program 487 times [2021-06-05 05:05:07,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:07,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128516517] [2021-06-05 05:05:07,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:07,860 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:07,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128516517] [2021-06-05 05:05:07,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128516517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:07,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630347397] [2021-06-05 05:05:07,861 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 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 [2021-06-05 05:05:07,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:08,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:08,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:08,034 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 15 treesize of output 11 [2021-06-05 05:05:08,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:08,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:08,037 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 16 treesize of output 12 [2021-06-05 05:05:08,038 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:08,067 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:05:08,068 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:08,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:08,068 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:05:08,132 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:08,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630347397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:08,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:08,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:08,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74019868] [2021-06-05 05:05:08,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:08,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:08,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:08,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:08,133 INFO L87 Difference]: Start difference. First operand 331 states and 887 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) [2021-06-05 05:05:08,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:08,895 INFO L93 Difference]: Finished difference Result 437 states and 1068 transitions. [2021-06-05 05:05:08,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:08,895 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 19 [2021-06-05 05:05:08,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:08,896 INFO L225 Difference]: With dead ends: 437 [2021-06-05 05:05:08,896 INFO L226 Difference]: Without dead ends: 433 [2021-06-05 05:05:08,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 746.8ms TimeCoverageRelationStatistics Valid=183, Invalid=1149, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:05:08,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-06-05 05:05:08,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 328. [2021-06-05 05:05:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.685015290519878) internal successors, (878), 327 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:08,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 878 transitions. [2021-06-05 05:05:08,899 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 878 transitions. Word has length 19 [2021-06-05 05:05:08,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:08,899 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 878 transitions. [2021-06-05 05:05:08,899 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) [2021-06-05 05:05:08,899 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 878 transitions. [2021-06-05 05:05:08,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:08,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:08,899 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:09,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14842,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:09,100 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:09,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:09,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1375553194, now seen corresponding path program 488 times [2021-06-05 05:05:09,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:09,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934790957] [2021-06-05 05:05:09,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:09,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:09,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:09,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934790957] [2021-06-05 05:05:09,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934790957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:09,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904354593] [2021-06-05 05:05:09,169 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 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 [2021-06-05 05:05:09,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:09,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:09,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:09,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:09,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:09,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:09,300 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 15 treesize of output 11 [2021-06-05 05:05:09,301 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:09,304 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 [2021-06-05 05:05:09,304 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,324 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:05:09,325 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:09,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:09,325 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:05:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:09,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904354593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:09,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:09,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:09,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663176837] [2021-06-05 05:05:09,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:09,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:09,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:09,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:09,347 INFO L87 Difference]: Start difference. First operand 328 states and 878 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) [2021-06-05 05:05:09,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:09,711 INFO L93 Difference]: Finished difference Result 446 states and 1101 transitions. [2021-06-05 05:05:09,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:05:09,712 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 19 [2021-06-05 05:05:09,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:09,712 INFO L225 Difference]: With dead ends: 446 [2021-06-05 05:05:09,712 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 05:05:09,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 343.4ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:05:09,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 05:05:09,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 320. [2021-06-05 05:05:09,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.664576802507837) internal successors, (850), 319 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:09,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 850 transitions. [2021-06-05 05:05:09,715 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 850 transitions. Word has length 19 [2021-06-05 05:05:09,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:09,716 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 850 transitions. [2021-06-05 05:05:09,716 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) [2021-06-05 05:05:09,716 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 850 transitions. [2021-06-05 05:05:09,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:09,716 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:09,716 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:09,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14861,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:09,916 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:09,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:09,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1003696907, now seen corresponding path program 489 times [2021-06-05 05:05:09,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:09,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330213570] [2021-06-05 05:05:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:09,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:09,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:09,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330213570] [2021-06-05 05:05:09,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330213570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:09,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629111859] [2021-06-05 05:05:09,988 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 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 [2021-06-05 05:05:10,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:05:10,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:10,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:10,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:10,166 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 [2021-06-05 05:05:10,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,169 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 [2021-06-05 05:05:10,170 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:10,172 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 [2021-06-05 05:05:10,173 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:10,207 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:05:10,207 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:10,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:10,208 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:05:10,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:10,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629111859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:10,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:10,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:05:10,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502872943] [2021-06-05 05:05:10,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:10,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:10,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:10,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:10,236 INFO L87 Difference]: Start difference. First operand 320 states and 850 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) [2021-06-05 05:05:10,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:10,584 INFO L93 Difference]: Finished difference Result 350 states and 905 transitions. [2021-06-05 05:05:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:05:10,585 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 19 [2021-06-05 05:05:10,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:10,585 INFO L225 Difference]: With dead ends: 350 [2021-06-05 05:05:10,585 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 05:05:10,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:05:10,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 05:05:10,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 316. [2021-06-05 05:05:10,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6634920634920634) internal successors, (839), 315 states have internal predecessors, (839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 839 transitions. [2021-06-05 05:05:10,588 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 839 transitions. Word has length 19 [2021-06-05 05:05:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:10,588 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 839 transitions. [2021-06-05 05:05:10,588 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) [2021-06-05 05:05:10,588 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 839 transitions. [2021-06-05 05:05:10,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:10,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:10,589 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:10,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 493 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14865 [2021-06-05 05:05:10,789 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:10,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:10,789 INFO L82 PathProgramCache]: Analyzing trace with hash -643455514, now seen corresponding path program 490 times [2021-06-05 05:05:10,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:10,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719703794] [2021-06-05 05:05:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:10,868 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:10,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:10,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719703794] [2021-06-05 05:05:10,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719703794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:10,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991854011] [2021-06-05 05:05:10,869 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 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 [2021-06-05 05:05:10,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:10,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:10,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:11,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:11,006 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:11,006 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 15 treesize of output 11 [2021-06-05 05:05:11,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,009 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:11,009 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:11,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:11,012 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 16 treesize of output 12 [2021-06-05 05:05:11,013 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,015 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 [2021-06-05 05:05:11,015 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:11,047 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:05:11,047 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:11,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:11,048 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:11,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991854011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:11,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:11,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:11,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538923258] [2021-06-05 05:05:11,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:11,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:11,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:11,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:11,099 INFO L87 Difference]: Start difference. First operand 316 states and 839 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) [2021-06-05 05:05:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:12,282 INFO L93 Difference]: Finished difference Result 496 states and 1216 transitions. [2021-06-05 05:05:12,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:05:12,282 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 [2021-06-05 05:05:12,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:12,283 INFO L225 Difference]: With dead ends: 496 [2021-06-05 05:05:12,283 INFO L226 Difference]: Without dead ends: 490 [2021-06-05 05:05:12,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1094.2ms TimeCoverageRelationStatistics Valid=293, Invalid=2059, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:05:12,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-06-05 05:05:12,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 334. [2021-06-05 05:05:12,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-06-05 05:05:12,286 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-06-05 05:05:12,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:12,286 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-06-05 05:05:12,286 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) [2021-06-05 05:05:12,286 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-06-05 05:05:12,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:12,287 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:12,287 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:12,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14878 [2021-06-05 05:05:12,487 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash -896610779, now seen corresponding path program 491 times [2021-06-05 05:05:12,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:12,494 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666496340] [2021-06-05 05:05:12,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:12,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:12,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:12,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666496340] [2021-06-05 05:05:12,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666496340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:12,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710724660] [2021-06-05 05:05:12,579 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 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 [2021-06-05 05:05:12,607 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:05:12,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:12,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:12,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:12,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:12,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:12,757 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 15 treesize of output 11 [2021-06-05 05:05:12,758 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:12,760 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:12,760 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 16 treesize of output 12 [2021-06-05 05:05:12,761 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:12,792 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:05:12,793 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:12,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:12,793 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:05:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:12,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710724660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:12,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:12,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803176235] [2021-06-05 05:05:12,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:12,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:12,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:12,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:12,839 INFO L87 Difference]: Start difference. First operand 334 states and 899 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) [2021-06-05 05:05:13,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:13,360 INFO L93 Difference]: Finished difference Result 430 states and 1080 transitions. [2021-06-05 05:05:13,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:05:13,360 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 [2021-06-05 05:05:13,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:13,360 INFO L225 Difference]: With dead ends: 430 [2021-06-05 05:05:13,360 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 05:05:13,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 512.5ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:05:13,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 05:05:13,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 334. [2021-06-05 05:05:13,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 333 states have (on average 2.6996996996997) internal successors, (899), 333 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:13,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 899 transitions. [2021-06-05 05:05:13,364 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 899 transitions. Word has length 19 [2021-06-05 05:05:13,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:13,364 INFO L482 AbstractCegarLoop]: Abstraction has 334 states and 899 transitions. [2021-06-05 05:05:13,364 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) [2021-06-05 05:05:13,364 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 899 transitions. [2021-06-05 05:05:13,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:13,365 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:13,365 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:13,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14890 [2021-06-05 05:05:13,565 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:13,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1343948502, now seen corresponding path program 492 times [2021-06-05 05:05:13,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:13,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149256199] [2021-06-05 05:05:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:13,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:13,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149256199] [2021-06-05 05:05:13,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149256199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:13,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279918042] [2021-06-05 05:05:13,643 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 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 [2021-06-05 05:05:13,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:05:13,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:13,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:13,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:13,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:13,777 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 15 treesize of output 11 [2021-06-05 05:05:13,778 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:13,780 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:13,781 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:13,783 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 [2021-06-05 05:05:13,783 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:13,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:13,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:13,786 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:13,818 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:05:13,818 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:13,819 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:13,819 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:13,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279918042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:13,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:13,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:13,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990858589] [2021-06-05 05:05:13,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:13,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:13,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:13,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:13,863 INFO L87 Difference]: Start difference. First operand 334 states and 899 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) [2021-06-05 05:05:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:14,884 INFO L93 Difference]: Finished difference Result 529 states and 1272 transitions. [2021-06-05 05:05:14,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:05:14,884 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 [2021-06-05 05:05:14,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:14,885 INFO L225 Difference]: With dead ends: 529 [2021-06-05 05:05:14,885 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 05:05:14,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 899.4ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:05:14,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 05:05:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 332. [2021-06-05 05:05:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 2.691842900302115) internal successors, (891), 331 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 891 transitions. [2021-06-05 05:05:14,889 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 891 transitions. Word has length 19 [2021-06-05 05:05:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:14,889 INFO L482 AbstractCegarLoop]: Abstraction has 332 states and 891 transitions. [2021-06-05 05:05:14,889 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) [2021-06-05 05:05:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 891 transitions. [2021-06-05 05:05:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:14,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:14,889 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:15,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14906,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:15,090 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:15,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:15,090 INFO L82 PathProgramCache]: Analyzing trace with hash 968221549, now seen corresponding path program 493 times [2021-06-05 05:05:15,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:15,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859834724] [2021-06-05 05:05:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:15,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:15,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859834724] [2021-06-05 05:05:15,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859834724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:15,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955828068] [2021-06-05 05:05:15,172 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 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 [2021-06-05 05:05:15,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:15,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:15,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:15,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:15,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:15,338 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 15 treesize of output 11 [2021-06-05 05:05:15,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:15,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:15,341 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 16 treesize of output 12 [2021-06-05 05:05:15,341 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:15,369 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:05:15,370 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:15,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:15,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:05:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:15,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955828068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:15,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:15,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:15,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573948231] [2021-06-05 05:05:15,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:15,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:15,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:15,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:15,443 INFO L87 Difference]: Start difference. First operand 332 states and 891 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) [2021-06-05 05:05:16,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:16,105 INFO L93 Difference]: Finished difference Result 424 states and 1058 transitions. [2021-06-05 05:05:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:05:16,105 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 [2021-06-05 05:05:16,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:16,105 INFO L225 Difference]: With dead ends: 424 [2021-06-05 05:05:16,105 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 05:05:16,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:05:16,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 05:05:16,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 330. [2021-06-05 05:05:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.689969604863222) internal successors, (885), 329 states have internal predecessors, (885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:16,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 885 transitions. [2021-06-05 05:05:16,109 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 885 transitions. Word has length 19 [2021-06-05 05:05:16,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:16,109 INFO L482 AbstractCegarLoop]: Abstraction has 330 states and 885 transitions. [2021-06-05 05:05:16,109 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) [2021-06-05 05:05:16,109 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 885 transitions. [2021-06-05 05:05:16,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:16,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:16,109 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:16,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14916 [2021-06-05 05:05:16,310 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:16,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:16,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1879178304, now seen corresponding path program 494 times [2021-06-05 05:05:16,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:16,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538545757] [2021-06-05 05:05:16,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:16,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:16,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:16,394 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:16,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538545757] [2021-06-05 05:05:16,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538545757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:16,394 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737483489] [2021-06-05 05:05:16,394 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 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 [2021-06-05 05:05:16,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:16,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:16,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:16,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:16,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,552 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 15 treesize of output 11 [2021-06-05 05:05:16,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,554 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:16,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:16,555 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,575 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:05:16,575 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:16,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:16,576 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:05:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:16,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737483489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:16,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:16,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:16,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151723807] [2021-06-05 05:05:16,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:16,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:16,600 INFO L87 Difference]: Start difference. First operand 330 states and 885 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) [2021-06-05 05:05:17,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:17,184 INFO L93 Difference]: Finished difference Result 447 states and 1108 transitions. [2021-06-05 05:05:17,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:05:17,184 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 [2021-06-05 05:05:17,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:17,184 INFO L225 Difference]: With dead ends: 447 [2021-06-05 05:05:17,184 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 05:05:17,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 518.5ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:05:17,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 05:05:17,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 326. [2021-06-05 05:05:17,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.68) internal successors, (871), 325 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:17,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 871 transitions. [2021-06-05 05:05:17,188 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 871 transitions. Word has length 19 [2021-06-05 05:05:17,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:17,188 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 871 transitions. [2021-06-05 05:05:17,188 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) [2021-06-05 05:05:17,188 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 871 transitions. [2021-06-05 05:05:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:17,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:17,188 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:17,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14929,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:17,401 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:17,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:17,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2043932705, now seen corresponding path program 495 times [2021-06-05 05:05:17,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:17,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251021789] [2021-06-05 05:05:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:17,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:17,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:17,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:17,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251021789] [2021-06-05 05:05:17,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251021789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:17,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189368123] [2021-06-05 05:05:17,481 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 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 [2021-06-05 05:05:17,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:05:17,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:17,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:17,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:17,673 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 [2021-06-05 05:05:17,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,676 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:17,677 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 16 treesize of output 12 [2021-06-05 05:05:17,677 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,680 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 [2021-06-05 05:05:17,680 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:17,715 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:05:17,716 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:17,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:17,716 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:05:17,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:17,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189368123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:17,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:17,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:17,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117954700] [2021-06-05 05:05:17,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:17,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:17,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:17,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:17,746 INFO L87 Difference]: Start difference. First operand 326 states and 871 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) [2021-06-05 05:05:18,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:18,142 INFO L93 Difference]: Finished difference Result 366 states and 944 transitions. [2021-06-05 05:05:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:05:18,142 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 [2021-06-05 05:05:18,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:18,142 INFO L225 Difference]: With dead ends: 366 [2021-06-05 05:05:18,142 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 05:05:18,143 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 419.5ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:05:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 05:05:18,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 324. [2021-06-05 05:05:18,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.678018575851393) internal successors, (865), 323 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 865 transitions. [2021-06-05 05:05:18,146 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 865 transitions. Word has length 19 [2021-06-05 05:05:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:18,146 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 865 transitions. [2021-06-05 05:05:18,146 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) [2021-06-05 05:05:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 865 transitions. [2021-06-05 05:05:18,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:18,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:18,146 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:18,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 499 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14933 [2021-06-05 05:05:18,347 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:18,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:18,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1291432982, now seen corresponding path program 496 times [2021-06-05 05:05:18,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:18,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186215903] [2021-06-05 05:05:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:18,447 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:18,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186215903] [2021-06-05 05:05:18,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186215903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:18,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779494218] [2021-06-05 05:05:18,447 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 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 [2021-06-05 05:05:18,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:18,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:18,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:18,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:18,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:18,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:18,623 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 15 treesize of output 11 [2021-06-05 05:05:18,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:18,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:18,626 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 16 treesize of output 12 [2021-06-05 05:05:18,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:18,648 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:05:18,648 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:18,648 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:18,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:05:18,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:18,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779494218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:18,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:18,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:18,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543685699] [2021-06-05 05:05:18,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:18,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:18,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:18,672 INFO L87 Difference]: Start difference. First operand 324 states and 865 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) [2021-06-05 05:05:18,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:18,998 INFO L93 Difference]: Finished difference Result 405 states and 1018 transitions. [2021-06-05 05:05:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:05:18,998 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 [2021-06-05 05:05:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:18,998 INFO L225 Difference]: With dead ends: 405 [2021-06-05 05:05:18,998 INFO L226 Difference]: Without dead ends: 405 [2021-06-05 05:05:18,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 308.2ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:05:18,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-06-05 05:05:19,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 320. [2021-06-05 05:05:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6677115987460813) internal successors, (851), 319 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 851 transitions. [2021-06-05 05:05:19,002 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 851 transitions. Word has length 19 [2021-06-05 05:05:19,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:19,002 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 851 transitions. [2021-06-05 05:05:19,002 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) [2021-06-05 05:05:19,002 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 851 transitions. [2021-06-05 05:05:19,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:19,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:19,002 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:19,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14946 [2021-06-05 05:05:19,203 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:19,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1031240173, now seen corresponding path program 497 times [2021-06-05 05:05:19,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:19,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500294297] [2021-06-05 05:05:19,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:19,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:19,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:19,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500294297] [2021-06-05 05:05:19,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500294297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:19,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963248737] [2021-06-05 05:05:19,291 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 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 [2021-06-05 05:05:19,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:05:19,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:19,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:19,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:19,480 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 [2021-06-05 05:05:19,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:19,487 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 [2021-06-05 05:05:19,488 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:19,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:19,490 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 16 treesize of output 12 [2021-06-05 05:05:19,491 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:19,528 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:05:19,528 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:19,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:19,529 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:05:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:19,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963248737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:19,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:19,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:05:19,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725086825] [2021-06-05 05:05:19,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:19,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:19,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:19,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:19,558 INFO L87 Difference]: Start difference. First operand 320 states and 851 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) [2021-06-05 05:05:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:19,832 INFO L93 Difference]: Finished difference Result 359 states and 921 transitions. [2021-06-05 05:05:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:05:19,832 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 [2021-06-05 05:05:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:19,833 INFO L225 Difference]: With dead ends: 359 [2021-06-05 05:05:19,833 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 05:05:19,833 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:05:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 05:05:19,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 320. [2021-06-05 05:05:19,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.6614420062695925) internal successors, (849), 319 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:19,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 849 transitions. [2021-06-05 05:05:19,836 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 849 transitions. Word has length 19 [2021-06-05 05:05:19,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:19,836 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 849 transitions. [2021-06-05 05:05:19,836 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) [2021-06-05 05:05:19,836 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 849 transitions. [2021-06-05 05:05:19,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:19,836 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:19,836 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:20,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14950 [2021-06-05 05:05:20,037 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash -81901800, now seen corresponding path program 498 times [2021-06-05 05:05:20,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:20,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285958546] [2021-06-05 05:05:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:20,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:20,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285958546] [2021-06-05 05:05:20,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285958546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:20,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567782924] [2021-06-05 05:05:20,122 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 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 [2021-06-05 05:05:20,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:05:20,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:20,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:20,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:20,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:20,494 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:20,494 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 15 treesize of output 11 [2021-06-05 05:05:20,495 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:20,497 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:20,498 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:20,535 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:05:20,537 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 [2021-06-05 05:05:20,538 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:20,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:20,551 INFO L518 ElimStorePlain]: Eliminatee v_prenex_539 vanished before elimination [2021-06-05 05:05:20,551 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:20,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:20,552 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:05:20,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:20,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567782924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:20,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:20,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:20,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528337809] [2021-06-05 05:05:20,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:20,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:20,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:20,585 INFO L87 Difference]: Start difference. First operand 320 states and 849 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) [2021-06-05 05:05:21,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:21,099 INFO L93 Difference]: Finished difference Result 460 states and 1081 transitions. [2021-06-05 05:05:21,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:05:21,099 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 [2021-06-05 05:05:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:21,100 INFO L225 Difference]: With dead ends: 460 [2021-06-05 05:05:21,100 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 05:05:21,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=90, Invalid=722, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:05:21,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 05:05:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 342. [2021-06-05 05:05:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.6422287390029324) internal successors, (901), 341 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 901 transitions. [2021-06-05 05:05:21,103 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 901 transitions. Word has length 19 [2021-06-05 05:05:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:21,103 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 901 transitions. [2021-06-05 05:05:21,103 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) [2021-06-05 05:05:21,103 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 901 transitions. [2021-06-05 05:05:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:21,104 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:21,104 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:21,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14963 [2021-06-05 05:05:21,304 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:21,304 INFO L82 PathProgramCache]: Analyzing trace with hash 132170361, now seen corresponding path program 499 times [2021-06-05 05:05:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:21,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065496571] [2021-06-05 05:05:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:21,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065496571] [2021-06-05 05:05:21,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065496571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:21,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473485251] [2021-06-05 05:05:21,390 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 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 [2021-06-05 05:05:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:21,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:21,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:21,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:21,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:21,597 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 16 treesize of output 12 [2021-06-05 05:05:21,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:21,600 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 15 treesize of output 11 [2021-06-05 05:05:21,601 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,622 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:05:21,622 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:21,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:21,623 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:05:21,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:21,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473485251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:21,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:21,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:21,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880504527] [2021-06-05 05:05:21,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:21,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:21,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:21,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:21,646 INFO L87 Difference]: Start difference. First operand 342 states and 901 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) [2021-06-05 05:05:21,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:21,916 INFO L93 Difference]: Finished difference Result 508 states and 1198 transitions. [2021-06-05 05:05:21,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:05:21,916 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 19 [2021-06-05 05:05:21,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:21,917 INFO L225 Difference]: With dead ends: 508 [2021-06-05 05:05:21,917 INFO L226 Difference]: Without dead ends: 508 [2021-06-05 05:05:21,917 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:21,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-06-05 05:05:21,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 351. [2021-06-05 05:05:21,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 2.657142857142857) internal successors, (930), 350 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:21,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 930 transitions. [2021-06-05 05:05:21,921 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 930 transitions. Word has length 19 [2021-06-05 05:05:21,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:21,921 INFO L482 AbstractCegarLoop]: Abstraction has 351 states and 930 transitions. [2021-06-05 05:05:21,921 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) [2021-06-05 05:05:21,921 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 930 transitions. [2021-06-05 05:05:21,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:21,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:21,921 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:22,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14990,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:22,122 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:22,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:22,122 INFO L82 PathProgramCache]: Analyzing trace with hash 777583956, now seen corresponding path program 500 times [2021-06-05 05:05:22,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:22,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920270862] [2021-06-05 05:05:22,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:22,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:22,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920270862] [2021-06-05 05:05:22,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920270862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:22,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928061610] [2021-06-05 05:05:22,210 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 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 [2021-06-05 05:05:22,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:22,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:22,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:22,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:22,600 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:22,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:22,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:22,603 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 15 treesize of output 11 [2021-06-05 05:05:22,604 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:22,639 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:05:22,640 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:22,642 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 [2021-06-05 05:05:22,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:22,655 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:22,655 INFO L518 ElimStorePlain]: Eliminatee v_prenex_545 vanished before elimination [2021-06-05 05:05:22,656 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:22,656 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:05:22,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:22,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928061610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:22,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:22,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:22,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885087135] [2021-06-05 05:05:22,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:22,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:22,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:22,686 INFO L87 Difference]: Start difference. First operand 351 states and 930 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) [2021-06-05 05:05:23,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:23,366 INFO L93 Difference]: Finished difference Result 503 states and 1168 transitions. [2021-06-05 05:05:23,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:05:23,366 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 [2021-06-05 05:05:23,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:23,367 INFO L225 Difference]: With dead ends: 503 [2021-06-05 05:05:23,367 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 05:05:23,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:05:23,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 05:05:23,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 353. [2021-06-05 05:05:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 2.65625) internal successors, (935), 352 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:23,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 935 transitions. [2021-06-05 05:05:23,370 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 935 transitions. Word has length 19 [2021-06-05 05:05:23,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:23,371 INFO L482 AbstractCegarLoop]: Abstraction has 353 states and 935 transitions. [2021-06-05 05:05:23,371 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) [2021-06-05 05:05:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 935 transitions. [2021-06-05 05:05:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:23,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:23,371 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:23,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 504 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14994 [2021-06-05 05:05:23,572 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:23,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:23,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1986457133, now seen corresponding path program 501 times [2021-06-05 05:05:23,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:23,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495694593] [2021-06-05 05:05:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:23,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:23,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495694593] [2021-06-05 05:05:23,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495694593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997324059] [2021-06-05 05:05:23,660 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 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 [2021-06-05 05:05:23,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:05:23,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:23,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:23,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:23,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:23,875 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 15 treesize of output 11 [2021-06-05 05:05:23,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:23,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:23,879 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 16 treesize of output 12 [2021-06-05 05:05:23,879 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:23,900 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:05:23,900 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:23,901 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:23,901 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:05:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:23,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997324059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:23,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:23,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:23,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537422179] [2021-06-05 05:05:23,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:23,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:23,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:23,924 INFO L87 Difference]: Start difference. First operand 353 states and 935 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) [2021-06-05 05:05:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:24,447 INFO L93 Difference]: Finished difference Result 565 states and 1323 transitions. [2021-06-05 05:05:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:05:24,447 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 19 [2021-06-05 05:05:24,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:24,448 INFO L225 Difference]: With dead ends: 565 [2021-06-05 05:05:24,448 INFO L226 Difference]: Without dead ends: 556 [2021-06-05 05:05:24,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 482.2ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:05:24,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2021-06-05 05:05:24,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 344. [2021-06-05 05:05:24,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6588921282798834) internal successors, (912), 343 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 912 transitions. [2021-06-05 05:05:24,452 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 912 transitions. Word has length 19 [2021-06-05 05:05:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:24,452 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 912 transitions. [2021-06-05 05:05:24,452 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) [2021-06-05 05:05:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 912 transitions. [2021-06-05 05:05:24,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:24,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:24,452 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:24,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15020 [2021-06-05 05:05:24,653 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:24,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:24,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1913687960, now seen corresponding path program 502 times [2021-06-05 05:05:24,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:24,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397723788] [2021-06-05 05:05:24,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:24,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:24,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397723788] [2021-06-05 05:05:24,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397723788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:24,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391570404] [2021-06-05 05:05:24,761 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 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 [2021-06-05 05:05:24,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:24,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:24,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:24,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:25,106 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:25,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:25,110 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 15 treesize of output 11 [2021-06-05 05:05:25,110 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,144 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:05:25,144 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:25,146 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 [2021-06-05 05:05:25,147 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:25,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:25,160 INFO L518 ElimStorePlain]: Eliminatee v_prenex_551 vanished before elimination [2021-06-05 05:05:25,161 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:25,161 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:05:25,189 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:25,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391570404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:25,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:25,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:25,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274571162] [2021-06-05 05:05:25,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:25,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:25,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:25,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:25,190 INFO L87 Difference]: Start difference. First operand 344 states and 912 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) [2021-06-05 05:05:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:25,937 INFO L93 Difference]: Finished difference Result 465 states and 1094 transitions. [2021-06-05 05:05:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:05:25,938 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 [2021-06-05 05:05:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:25,938 INFO L225 Difference]: With dead ends: 465 [2021-06-05 05:05:25,938 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 05:05:25,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:05:25,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 05:05:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 344. [2021-06-05 05:05:25,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 2.6501457725947524) internal successors, (909), 343 states have internal predecessors, (909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 909 transitions. [2021-06-05 05:05:25,942 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 909 transitions. Word has length 19 [2021-06-05 05:05:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:25,942 INFO L482 AbstractCegarLoop]: Abstraction has 344 states and 909 transitions. [2021-06-05 05:05:25,942 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) [2021-06-05 05:05:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 909 transitions. [2021-06-05 05:05:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:25,942 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:25,942 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:26,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15024,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:26,143 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:26,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:26,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1639157959, now seen corresponding path program 503 times [2021-06-05 05:05:26,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:26,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285517855] [2021-06-05 05:05:26,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:26,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:26,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:26,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285517855] [2021-06-05 05:05:26,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285517855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:26,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972500819] [2021-06-05 05:05:26,229 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 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 [2021-06-05 05:05:26,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:05:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:26,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:26,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,456 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 15 treesize of output 11 [2021-06-05 05:05:26,457 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:26,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:26,460 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,480 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:05:26,481 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:26,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:26,481 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:05:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:26,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972500819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:26,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:26,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:26,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112723857] [2021-06-05 05:05:26,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:26,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:26,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:26,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:26,504 INFO L87 Difference]: Start difference. First operand 344 states and 909 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) [2021-06-05 05:05:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:27,556 INFO L93 Difference]: Finished difference Result 515 states and 1189 transitions. [2021-06-05 05:05:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:27,556 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 19 [2021-06-05 05:05:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:27,557 INFO L225 Difference]: With dead ends: 515 [2021-06-05 05:05:27,557 INFO L226 Difference]: Without dead ends: 497 [2021-06-05 05:05:27,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 957.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:05:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2021-06-05 05:05:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 315. [2021-06-05 05:05:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.6178343949044587) internal successors, (822), 314 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:27,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 822 transitions. [2021-06-05 05:05:27,560 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 822 transitions. Word has length 19 [2021-06-05 05:05:27,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:27,560 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 822 transitions. [2021-06-05 05:05:27,560 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) [2021-06-05 05:05:27,560 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 822 transitions. [2021-06-05 05:05:27,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:27,561 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:27,561 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:27,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15040 [2021-06-05 05:05:27,761 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:27,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:27,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1673241812, now seen corresponding path program 504 times [2021-06-05 05:05:27,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:27,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386158967] [2021-06-05 05:05:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:27,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:27,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:27,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386158967] [2021-06-05 05:05:27,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386158967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:27,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212881684] [2021-06-05 05:05:27,879 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 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 [2021-06-05 05:05:27,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:05:27,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:27,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:27,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:28,130 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 [2021-06-05 05:05:28,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:28,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:28,134 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 15 treesize of output 11 [2021-06-05 05:05:28,135 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:28,175 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:05:28,175 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:28,177 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 [2021-06-05 05:05:28,178 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:28,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:28,192 INFO L518 ElimStorePlain]: Eliminatee v_prenex_554 vanished before elimination [2021-06-05 05:05:28,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:28,193 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:05:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:28,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212881684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:28,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:28,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:28,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092933571] [2021-06-05 05:05:28,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:28,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:28,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:28,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:28,256 INFO L87 Difference]: Start difference. First operand 315 states and 822 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) [2021-06-05 05:05:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:29,225 INFO L93 Difference]: Finished difference Result 485 states and 1081 transitions. [2021-06-05 05:05:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:05:29,225 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 [2021-06-05 05:05:29,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:29,226 INFO L225 Difference]: With dead ends: 485 [2021-06-05 05:05:29,226 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 05:05:29,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 947.6ms TimeCoverageRelationStatistics Valid=196, Invalid=1364, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:05:29,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 05:05:29,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 320. [2021-06-05 05:05:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 2.633228840125392) internal successors, (840), 319 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:29,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 840 transitions. [2021-06-05 05:05:29,229 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 840 transitions. Word has length 19 [2021-06-05 05:05:29,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:29,229 INFO L482 AbstractCegarLoop]: Abstraction has 320 states and 840 transitions. [2021-06-05 05:05:29,229 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) [2021-06-05 05:05:29,229 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 840 transitions. [2021-06-05 05:05:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:29,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:29,230 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:29,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15044,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:29,437 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:29,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:29,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1420086547, now seen corresponding path program 505 times [2021-06-05 05:05:29,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:29,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186696531] [2021-06-05 05:05:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:29,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186696531] [2021-06-05 05:05:29,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186696531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:29,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790070436] [2021-06-05 05:05:29,570 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 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 [2021-06-05 05:05:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:29,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:29,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:29,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:29,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:29,766 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 16 treesize of output 12 [2021-06-05 05:05:29,767 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:29,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:29,769 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 15 treesize of output 11 [2021-06-05 05:05:29,770 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:29,795 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:29,795 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:29,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:29,796 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:29,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:29,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790070436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:29,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:29,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:29,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342146323] [2021-06-05 05:05:29,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:29,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:29,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:29,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:29,846 INFO L87 Difference]: Start difference. First operand 320 states and 840 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) [2021-06-05 05:05:30,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:30,878 INFO L93 Difference]: Finished difference Result 488 states and 1101 transitions. [2021-06-05 05:05:30,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:05:30,878 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 19 [2021-06-05 05:05:30,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:30,879 INFO L225 Difference]: With dead ends: 488 [2021-06-05 05:05:30,879 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 05:05:30,879 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1070.2ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:05:30,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 05:05:30,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 313. [2021-06-05 05:05:30,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.6153846153846154) internal successors, (816), 312 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:30,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 816 transitions. [2021-06-05 05:05:30,882 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 816 transitions. Word has length 19 [2021-06-05 05:05:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:30,882 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 816 transitions. [2021-06-05 05:05:30,882 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) [2021-06-05 05:05:30,882 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 816 transitions. [2021-06-05 05:05:30,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:30,882 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:30,883 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:31,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15057,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:31,083 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:31,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash 972748824, now seen corresponding path program 506 times [2021-06-05 05:05:31,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:31,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360184769] [2021-06-05 05:05:31,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:31,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:31,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360184769] [2021-06-05 05:05:31,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360184769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:31,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993257668] [2021-06-05 05:05:31,165 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 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 [2021-06-05 05:05:31,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:31,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:31,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:31,399 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 [2021-06-05 05:05:31,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:31,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:31,403 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 [2021-06-05 05:05:31,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:31,443 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:05:31,443 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:31,445 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 [2021-06-05 05:05:31,446 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:31,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:31,460 INFO L518 ElimStorePlain]: Eliminatee v_prenex_557 vanished before elimination [2021-06-05 05:05:31,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:31,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:05:31,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:31,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993257668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:31,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:31,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:31,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670485222] [2021-06-05 05:05:31,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:31,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:31,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:31,521 INFO L87 Difference]: Start difference. First operand 313 states and 816 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) [2021-06-05 05:05:31,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:31,917 INFO L93 Difference]: Finished difference Result 403 states and 946 transitions. [2021-06-05 05:05:31,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:05:31,917 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 [2021-06-05 05:05:31,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:31,918 INFO L225 Difference]: With dead ends: 403 [2021-06-05 05:05:31,918 INFO L226 Difference]: Without dead ends: 401 [2021-06-05 05:05:31,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 411.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:05:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-06-05 05:05:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 310. [2021-06-05 05:05:31,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.6019417475728157) internal successors, (804), 309 states have internal predecessors, (804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 804 transitions. [2021-06-05 05:05:31,921 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 804 transitions. Word has length 19 [2021-06-05 05:05:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:31,921 INFO L482 AbstractCegarLoop]: Abstraction has 310 states and 804 transitions. [2021-06-05 05:05:31,921 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) [2021-06-05 05:05:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 804 transitions. [2021-06-05 05:05:31,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:31,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:31,922 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:32,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15065 [2021-06-05 05:05:32,122 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:32,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:32,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1010048421, now seen corresponding path program 507 times [2021-06-05 05:05:32,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:32,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072770246] [2021-06-05 05:05:32,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:32,204 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:32,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:32,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072770246] [2021-06-05 05:05:32,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072770246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:32,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883967713] [2021-06-05 05:05:32,204 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 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 [2021-06-05 05:05:32,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:05:32,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:32,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:32,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:32,399 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 16 treesize of output 12 [2021-06-05 05:05:32,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:32,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:32,402 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 15 treesize of output 11 [2021-06-05 05:05:32,403 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:32,430 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:32,430 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:32,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:32,431 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:32,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:32,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883967713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:32,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:32,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:05:32,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617071764] [2021-06-05 05:05:32,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:05:32,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:32,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:05:32,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:32,513 INFO L87 Difference]: Start difference. First operand 310 states and 804 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) [2021-06-05 05:05:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:33,676 INFO L93 Difference]: Finished difference Result 381 states and 919 transitions. [2021-06-05 05:05:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:33,676 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 [2021-06-05 05:05:33,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:33,676 INFO L225 Difference]: With dead ends: 381 [2021-06-05 05:05:33,677 INFO L226 Difference]: Without dead ends: 375 [2021-06-05 05:05:33,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1162.4ms TimeCoverageRelationStatistics Valid=232, Invalid=1408, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:05:33,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-06-05 05:05:33,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 303. [2021-06-05 05:05:33,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:33,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-06-05 05:05:33,680 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-06-05 05:05:33,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:33,680 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-06-05 05:05:33,680 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) [2021-06-05 05:05:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-06-05 05:05:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:33,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:33,680 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:33,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15076,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:33,881 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:33,881 INFO L82 PathProgramCache]: Analyzing trace with hash -920005186, now seen corresponding path program 508 times [2021-06-05 05:05:33,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:33,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682974129] [2021-06-05 05:05:33,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:33,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:33,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:33,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682974129] [2021-06-05 05:05:33,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682974129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:33,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568026399] [2021-06-05 05:05:33,957 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 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 [2021-06-05 05:05:33,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:33,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:33,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:33,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:34,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:34,252 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:34,253 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 [2021-06-05 05:05:34,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:34,256 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:34,256 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:34,293 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:05:34,293 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:34,297 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 [2021-06-05 05:05:34,297 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:34,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:34,311 INFO L518 ElimStorePlain]: Eliminatee v_prenex_562 vanished before elimination [2021-06-05 05:05:34,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:34,312 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:05:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:34,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568026399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:34,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:34,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:34,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496816812] [2021-06-05 05:05:34,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:34,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:34,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:34,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:34,341 INFO L87 Difference]: Start difference. First operand 303 states and 786 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) [2021-06-05 05:05:34,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:34,572 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-06-05 05:05:34,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:05:34,572 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 [2021-06-05 05:05:34,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:34,572 INFO L225 Difference]: With dead ends: 331 [2021-06-05 05:05:34,572 INFO L226 Difference]: Without dead ends: 313 [2021-06-05 05:05:34,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 330.2ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:34,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-05 05:05:34,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 304. [2021-06-05 05:05:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 05:05:34,575 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 05:05:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:34,575 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 05:05:34,575 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) [2021-06-05 05:05:34,575 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 05:05:34,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:34,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:34,576 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:34,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15087 [2021-06-05 05:05:34,776 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:34,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:34,776 INFO L82 PathProgramCache]: Analyzing trace with hash 610921021, now seen corresponding path program 509 times [2021-06-05 05:05:34,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:34,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359875072] [2021-06-05 05:05:34,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:34,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:34,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359875072] [2021-06-05 05:05:34,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359875072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:34,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344797737] [2021-06-05 05:05:34,847 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 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 [2021-06-05 05:05:34,875 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:05:34,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:34,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:34,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:35,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,033 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 15 treesize of output 11 [2021-06-05 05:05:35,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,036 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 16 treesize of output 12 [2021-06-05 05:05:35,036 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,057 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:05:35,057 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:35,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,063 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:05:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:35,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344797737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:35,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:35,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:35,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930788396] [2021-06-05 05:05:35,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:35,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:35,084 INFO L87 Difference]: Start difference. First operand 304 states and 788 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) [2021-06-05 05:05:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:35,340 INFO L93 Difference]: Finished difference Result 355 states and 889 transitions. [2021-06-05 05:05:35,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:05:35,340 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 [2021-06-05 05:05:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:35,341 INFO L225 Difference]: With dead ends: 355 [2021-06-05 05:05:35,341 INFO L226 Difference]: Without dead ends: 355 [2021-06-05 05:05:35,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 221.2ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:05:35,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2021-06-05 05:05:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 304. [2021-06-05 05:05:35,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 05:05:35,344 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 05:05:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:35,344 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 05:05:35,344 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) [2021-06-05 05:05:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 05:05:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:35,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:35,344 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:35,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 513 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15104 [2021-06-05 05:05:35,545 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:35,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:35,545 INFO L82 PathProgramCache]: Analyzing trace with hash 216098818, now seen corresponding path program 510 times [2021-06-05 05:05:35,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:35,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000975294] [2021-06-05 05:05:35,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:35,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:35,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000975294] [2021-06-05 05:05:35,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000975294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:35,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359305741] [2021-06-05 05:05:35,620 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 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 [2021-06-05 05:05:35,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:05:35,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:35,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:35,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:35,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,920 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:35,920 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 15 treesize of output 11 [2021-06-05 05:05:35,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,923 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:35,930 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,965 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:05:35,965 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:35,967 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 [2021-06-05 05:05:35,968 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:35,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:35,980 INFO L518 ElimStorePlain]: Eliminatee v_prenex_566 vanished before elimination [2021-06-05 05:05:35,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:35,981 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:05:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:36,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359305741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:36,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:36,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:36,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256806348] [2021-06-05 05:05:36,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:36,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:36,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:36,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:36,009 INFO L87 Difference]: Start difference. First operand 304 states and 788 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) [2021-06-05 05:05:36,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:36,344 INFO L93 Difference]: Finished difference Result 329 states and 829 transitions. [2021-06-05 05:05:36,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:05:36,345 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 [2021-06-05 05:05:36,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:36,345 INFO L225 Difference]: With dead ends: 329 [2021-06-05 05:05:36,345 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 05:05:36,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:05:36,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 05:05:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 304. [2021-06-05 05:05:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 05:05:36,348 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 05:05:36,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:36,348 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 05:05:36,348 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) [2021-06-05 05:05:36,348 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 05:05:36,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:36,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:36,348 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:36,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15108,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:36,549 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash 958220195, now seen corresponding path program 511 times [2021-06-05 05:05:36,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:36,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448934613] [2021-06-05 05:05:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:36,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:36,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:36,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448934613] [2021-06-05 05:05:36,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448934613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:36,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728459488] [2021-06-05 05:05:36,622 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 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 [2021-06-05 05:05:36,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:36,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:36,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:36,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:36,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:36,820 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 15 treesize of output 11 [2021-06-05 05:05:36,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:36,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:36,822 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 16 treesize of output 12 [2021-06-05 05:05:36,823 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:36,856 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:05:36,857 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:36,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:36,857 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:05:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:36,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728459488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:36,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:36,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:36,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949787881] [2021-06-05 05:05:36,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:36,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:36,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:36,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:36,879 INFO L87 Difference]: Start difference. First operand 304 states and 788 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) [2021-06-05 05:05:37,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:37,321 INFO L93 Difference]: Finished difference Result 409 states and 997 transitions. [2021-06-05 05:05:37,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:05:37,322 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 [2021-06-05 05:05:37,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:37,322 INFO L225 Difference]: With dead ends: 409 [2021-06-05 05:05:37,322 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 05:05:37,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:05:37,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 05:05:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 305. [2021-06-05 05:05:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:37,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 05:05:37,325 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 05:05:37,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:37,325 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 05:05:37,325 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) [2021-06-05 05:05:37,325 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 05:05:37,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:37,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:37,326 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:37,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15125,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:37,526 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash -24347330, now seen corresponding path program 512 times [2021-06-05 05:05:37,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:37,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581305758] [2021-06-05 05:05:37,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:37,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:37,599 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:37,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581305758] [2021-06-05 05:05:37,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581305758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:37,599 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674333817] [2021-06-05 05:05:37,599 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 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 [2021-06-05 05:05:37,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:37,824 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 [2021-06-05 05:05:37,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:37,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:37,828 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:37,868 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:05:37,870 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 [2021-06-05 05:05:37,871 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:37,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:37,885 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:37,885 INFO L518 ElimStorePlain]: Eliminatee v_prenex_570 vanished before elimination [2021-06-05 05:05:37,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:37,886 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:05:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:37,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674333817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:37,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:37,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:37,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018514656] [2021-06-05 05:05:37,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:37,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:37,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:37,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:37,956 INFO L87 Difference]: Start difference. First operand 305 states and 790 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) [2021-06-05 05:05:38,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:38,537 INFO L93 Difference]: Finished difference Result 370 states and 901 transitions. [2021-06-05 05:05:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:38,537 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 [2021-06-05 05:05:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:38,538 INFO L225 Difference]: With dead ends: 370 [2021-06-05 05:05:38,538 INFO L226 Difference]: Without dead ends: 364 [2021-06-05 05:05:38,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 610.1ms TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:05:38,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2021-06-05 05:05:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 307. [2021-06-05 05:05:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-06-05 05:05:38,541 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-06-05 05:05:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:38,541 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-06-05 05:05:38,541 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) [2021-06-05 05:05:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-06-05 05:05:38,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:38,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:38,541 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:38,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15129,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:38,742 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:38,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:38,742 INFO L82 PathProgramCache]: Analyzing trace with hash -277502595, now seen corresponding path program 513 times [2021-06-05 05:05:38,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:38,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424069821] [2021-06-05 05:05:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:38,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:38,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424069821] [2021-06-05 05:05:38,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424069821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:38,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867710439] [2021-06-05 05:05:38,810 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 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 [2021-06-05 05:05:38,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:05:38,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:38,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:38,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:38,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:38,980 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 16 treesize of output 12 [2021-06-05 05:05:38,981 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:38,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:38,983 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 [2021-06-05 05:05:38,984 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:39,009 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:39,009 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:39,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:39,010 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:39,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867710439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:39,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:39,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:39,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934260522] [2021-06-05 05:05:39,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:39,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:39,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:39,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:39,060 INFO L87 Difference]: Start difference. First operand 307 states and 797 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) [2021-06-05 05:05:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:39,651 INFO L93 Difference]: Finished difference Result 457 states and 1081 transitions. [2021-06-05 05:05:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:05:39,651 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 [2021-06-05 05:05:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:39,652 INFO L225 Difference]: With dead ends: 457 [2021-06-05 05:05:39,652 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 05:05:39,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 587.0ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:05:39,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 05:05:39,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 307. [2021-06-05 05:05:39,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.604575163398693) internal successors, (797), 306 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:39,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 797 transitions. [2021-06-05 05:05:39,655 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 797 transitions. Word has length 19 [2021-06-05 05:05:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:39,655 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 797 transitions. [2021-06-05 05:05:39,655 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) [2021-06-05 05:05:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 797 transitions. [2021-06-05 05:05:39,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:39,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:39,656 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:39,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15148 [2021-06-05 05:05:39,856 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:39,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:39,856 INFO L82 PathProgramCache]: Analyzing trace with hash -724840318, now seen corresponding path program 514 times [2021-06-05 05:05:39,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:39,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864806319] [2021-06-05 05:05:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:39,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:39,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864806319] [2021-06-05 05:05:39,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864806319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:39,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690278307] [2021-06-05 05:05:39,937 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 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 [2021-06-05 05:05:39,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:39,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:39,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:39,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:40,146 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 [2021-06-05 05:05:40,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:40,150 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 16 treesize of output 12 [2021-06-05 05:05:40,150 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,191 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:05:40,191 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:40,193 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 [2021-06-05 05:05:40,194 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:40,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:40,208 INFO L518 ElimStorePlain]: Eliminatee v_prenex_573 vanished before elimination [2021-06-05 05:05:40,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:40,209 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:05:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:40,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690278307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:40,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:40,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:40,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310829495] [2021-06-05 05:05:40,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:40,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:40,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:40,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:40,261 INFO L87 Difference]: Start difference. First operand 307 states and 797 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) [2021-06-05 05:05:40,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:40,609 INFO L93 Difference]: Finished difference Result 340 states and 859 transitions. [2021-06-05 05:05:40,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:05:40,610 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 [2021-06-05 05:05:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:40,610 INFO L225 Difference]: With dead ends: 340 [2021-06-05 05:05:40,610 INFO L226 Difference]: Without dead ends: 340 [2021-06-05 05:05:40,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:05:40,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-06-05 05:05:40,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 306. [2021-06-05 05:05:40,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6) internal successors, (793), 305 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:40,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 793 transitions. [2021-06-05 05:05:40,613 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 793 transitions. Word has length 19 [2021-06-05 05:05:40,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:40,613 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 793 transitions. [2021-06-05 05:05:40,613 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) [2021-06-05 05:05:40,613 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 793 transitions. [2021-06-05 05:05:40,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:40,613 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:40,614 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:40,814 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15156,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:40,814 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:40,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:40,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1587329733, now seen corresponding path program 515 times [2021-06-05 05:05:40,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:40,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171057929] [2021-06-05 05:05:40,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:40,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:40,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:40,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:40,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171057929] [2021-06-05 05:05:40,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171057929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:40,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000392909] [2021-06-05 05:05:40,947 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 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 [2021-06-05 05:05:40,977 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:05:40,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:40,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:40,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:41,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:41,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:41,121 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 16 treesize of output 12 [2021-06-05 05:05:41,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:41,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:41,124 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 15 treesize of output 11 [2021-06-05 05:05:41,125 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:41,149 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:41,149 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:41,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:41,150 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:41,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000392909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:41,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:41,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:41,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828939007] [2021-06-05 05:05:41,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:41,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:41,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:41,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:41,214 INFO L87 Difference]: Start difference. First operand 306 states and 793 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) [2021-06-05 05:05:41,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:41,975 INFO L93 Difference]: Finished difference Result 398 states and 971 transitions. [2021-06-05 05:05:41,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:41,976 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 [2021-06-05 05:05:41,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:41,976 INFO L225 Difference]: With dead ends: 398 [2021-06-05 05:05:41,976 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 05:05:41,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 800.4ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:05:41,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 05:05:41,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 303. [2021-06-05 05:05:41,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.6026490066225167) internal successors, (786), 302 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 786 transitions. [2021-06-05 05:05:41,979 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 786 transitions. Word has length 19 [2021-06-05 05:05:41,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:41,979 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 786 transitions. [2021-06-05 05:05:41,979 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) [2021-06-05 05:05:41,979 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 786 transitions. [2021-06-05 05:05:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:41,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:41,979 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:42,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15173 [2021-06-05 05:05:42,180 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:42,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:42,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1916872104, now seen corresponding path program 516 times [2021-06-05 05:05:42,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:42,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443625441] [2021-06-05 05:05:42,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:42,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:42,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:42,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:42,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443625441] [2021-06-05 05:05:42,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443625441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:42,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266192243] [2021-06-05 05:05:42,240 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 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 [2021-06-05 05:05:42,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:42,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:42,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:42,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:42,520 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:42,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:42,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:42,524 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 15 treesize of output 11 [2021-06-05 05:05:42,524 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:42,560 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:05:42,560 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:42,562 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 [2021-06-05 05:05:42,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:42,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:42,576 INFO L518 ElimStorePlain]: Eliminatee v_prenex_578 vanished before elimination [2021-06-05 05:05:42,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:42,577 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:05:42,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:42,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266192243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:42,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:42,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:42,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139976675] [2021-06-05 05:05:42,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:42,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:42,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:42,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:42,604 INFO L87 Difference]: Start difference. First operand 303 states and 786 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) [2021-06-05 05:05:42,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:42,968 INFO L93 Difference]: Finished difference Result 379 states and 911 transitions. [2021-06-05 05:05:42,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:05:42,968 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 [2021-06-05 05:05:42,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:42,969 INFO L225 Difference]: With dead ends: 379 [2021-06-05 05:05:42,969 INFO L226 Difference]: Without dead ends: 367 [2021-06-05 05:05:42,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 350.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:05:42,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-06-05 05:05:42,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 294. [2021-06-05 05:05:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.590443686006826) internal successors, (759), 293 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 759 transitions. [2021-06-05 05:05:42,972 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 759 transitions. Word has length 19 [2021-06-05 05:05:42,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:42,972 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 759 transitions. [2021-06-05 05:05:42,972 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) [2021-06-05 05:05:42,972 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 759 transitions. [2021-06-05 05:05:42,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:42,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:42,972 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:43,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15184,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:43,173 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:43,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:43,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1174750727, now seen corresponding path program 517 times [2021-06-05 05:05:43,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:43,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86772091] [2021-06-05 05:05:43,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:43,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:43,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86772091] [2021-06-05 05:05:43,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86772091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330886514] [2021-06-05 05:05:43,243 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 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 [2021-06-05 05:05:43,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:43,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:43,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:43,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:43,414 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 15 treesize of output 11 [2021-06-05 05:05:43,415 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:43,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:43,417 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 16 treesize of output 12 [2021-06-05 05:05:43,418 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:43,440 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:05:43,441 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:43,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:43,443 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:05:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:43,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330886514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:43,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:43,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:43,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499629427] [2021-06-05 05:05:43,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:43,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:43,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:43,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:43,499 INFO L87 Difference]: Start difference. First operand 294 states and 759 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:05:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:43,761 INFO L93 Difference]: Finished difference Result 426 states and 1007 transitions. [2021-06-05 05:05:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:05:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:05:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:43,761 INFO L225 Difference]: With dead ends: 426 [2021-06-05 05:05:43,762 INFO L226 Difference]: Without dead ends: 426 [2021-06-05 05:05:43,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-06-05 05:05:43,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 305. [2021-06-05 05:05:43,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6052631578947367) internal successors, (792), 304 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:43,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 792 transitions. [2021-06-05 05:05:43,765 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 792 transitions. Word has length 19 [2021-06-05 05:05:43,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:43,765 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 792 transitions. [2021-06-05 05:05:43,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:05:43,765 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 792 transitions. [2021-06-05 05:05:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:43,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:43,765 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:43,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15201,521 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:43,966 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:43,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:43,966 INFO L82 PathProgramCache]: Analyzing trace with hash 2137649044, now seen corresponding path program 518 times [2021-06-05 05:05:43,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:43,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690764064] [2021-06-05 05:05:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:44,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:44,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690764064] [2021-06-05 05:05:44,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690764064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:44,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537562345] [2021-06-05 05:05:44,030 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 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 [2021-06-05 05:05:44,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:44,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:44,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:44,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:44,214 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 [2021-06-05 05:05:44,215 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:44,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:44,225 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 15 treesize of output 11 [2021-06-05 05:05:44,226 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:44,266 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:05:44,266 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:44,268 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 [2021-06-05 05:05:44,269 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:44,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:44,283 INFO L518 ElimStorePlain]: Eliminatee v_prenex_579 vanished before elimination [2021-06-05 05:05:44,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:44,284 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:05:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:44,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537562345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:44,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:44,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:44,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326195649] [2021-06-05 05:05:44,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:44,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:44,342 INFO L87 Difference]: Start difference. First operand 305 states and 792 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) [2021-06-05 05:05:44,765 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-06-05 05:05:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:45,112 INFO L93 Difference]: Finished difference Result 416 states and 972 transitions. [2021-06-05 05:05:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:05:45,113 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 [2021-06-05 05:05:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:45,113 INFO L225 Difference]: With dead ends: 416 [2021-06-05 05:05:45,113 INFO L226 Difference]: Without dead ends: 410 [2021-06-05 05:05:45,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 690.0ms TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:05:45,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-06-05 05:05:45,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 307. [2021-06-05 05:05:45,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-06-05 05:05:45,116 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-06-05 05:05:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:45,117 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-06-05 05:05:45,117 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) [2021-06-05 05:05:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-06-05 05:05:45,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:45,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:45,117 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:45,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 522 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15205 [2021-06-05 05:05:45,318 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:45,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1884493779, now seen corresponding path program 519 times [2021-06-05 05:05:45,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:45,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981548745] [2021-06-05 05:05:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:45,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981548745] [2021-06-05 05:05:45,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981548745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:45,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653556674] [2021-06-05 05:05:45,376 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 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 [2021-06-05 05:05:45,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:05:45,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:45,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:45,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:45,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:45,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:45,530 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 15 treesize of output 11 [2021-06-05 05:05:45,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:45,533 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 16 treesize of output 12 [2021-06-05 05:05:45,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:45,561 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:45,561 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:45,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:45,562 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:45,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653556674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:45,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:45,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942514338] [2021-06-05 05:05:45,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:45,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:45,605 INFO L87 Difference]: Start difference. First operand 307 states and 799 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:05:45,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:45,889 INFO L93 Difference]: Finished difference Result 475 states and 1100 transitions. [2021-06-05 05:05:45,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:05:45,889 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:05:45,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:45,890 INFO L225 Difference]: With dead ends: 475 [2021-06-05 05:05:45,890 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 05:05:45,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 229.5ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:05:45,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 05:05:45,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 307. [2021-06-05 05:05:45,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.611111111111111) internal successors, (799), 306 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 799 transitions. [2021-06-05 05:05:45,893 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 799 transitions. Word has length 19 [2021-06-05 05:05:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:45,893 INFO L482 AbstractCegarLoop]: Abstraction has 307 states and 799 transitions. [2021-06-05 05:05:45,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:05:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 799 transitions. [2021-06-05 05:05:45,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:45,894 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:45,894 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:46,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15224,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:46,094 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:46,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:46,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1437156056, now seen corresponding path program 520 times [2021-06-05 05:05:46,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:46,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405040057] [2021-06-05 05:05:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:46,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:46,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:46,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:46,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405040057] [2021-06-05 05:05:46,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405040057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:46,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970895609] [2021-06-05 05:05:46,153 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 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 [2021-06-05 05:05:46,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:46,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:46,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:46,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:46,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:46,340 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:46,340 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 15 treesize of output 11 [2021-06-05 05:05:46,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:46,343 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:46,344 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:46,379 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:05:46,379 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:46,381 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 [2021-06-05 05:05:46,382 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:46,396 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:05:46,397 INFO L518 ElimStorePlain]: Eliminatee v_prenex_583 vanished before elimination [2021-06-05 05:05:46,397 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:46,397 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:05:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:46,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970895609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:46,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:46,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:46,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141089686] [2021-06-05 05:05:46,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:46,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:46,448 INFO L87 Difference]: Start difference. First operand 307 states and 799 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) [2021-06-05 05:05:46,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:46,692 INFO L93 Difference]: Finished difference Result 386 states and 930 transitions. [2021-06-05 05:05:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:05:46,693 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 [2021-06-05 05:05:46,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:46,693 INFO L225 Difference]: With dead ends: 386 [2021-06-05 05:05:46,693 INFO L226 Difference]: Without dead ends: 386 [2021-06-05 05:05:46,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:05:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-06-05 05:05:46,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 306. [2021-06-05 05:05:46,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.6065573770491803) internal successors, (795), 305 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:46,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 795 transitions. [2021-06-05 05:05:46,696 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 795 transitions. Word has length 19 [2021-06-05 05:05:46,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:46,696 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 795 transitions. [2021-06-05 05:05:46,696 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) [2021-06-05 05:05:46,696 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 795 transitions. [2021-06-05 05:05:46,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:46,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:46,697 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:46,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15232,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:46,897 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:46,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:46,897 INFO L82 PathProgramCache]: Analyzing trace with hash -545641189, now seen corresponding path program 521 times [2021-06-05 05:05:46,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:46,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931030696] [2021-06-05 05:05:46,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:46,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:46,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931030696] [2021-06-05 05:05:46,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931030696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:46,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550155781] [2021-06-05 05:05:46,956 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 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 [2021-06-05 05:05:46,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:05:46,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:46,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:46,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:47,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:47,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:47,110 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 15 treesize of output 11 [2021-06-05 05:05:47,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:47,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:47,113 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 16 treesize of output 12 [2021-06-05 05:05:47,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:47,138 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:05:47,139 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:47,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:47,139 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:05:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:47,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550155781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:47,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:47,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:47,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604679528] [2021-06-05 05:05:47,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:47,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:47,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:47,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:47,204 INFO L87 Difference]: Start difference. First operand 306 states and 795 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) [2021-06-05 05:05:47,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:47,679 INFO L93 Difference]: Finished difference Result 475 states and 1084 transitions. [2021-06-05 05:05:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:05:47,679 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 [2021-06-05 05:05:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:47,680 INFO L225 Difference]: With dead ends: 475 [2021-06-05 05:05:47,680 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 05:05:47,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:05:47,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 05:05:47,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 304. [2021-06-05 05:05:47,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.607260726072607) internal successors, (790), 303 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:47,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 790 transitions. [2021-06-05 05:05:47,683 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 790 transitions. Word has length 19 [2021-06-05 05:05:47,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:47,683 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 790 transitions. [2021-06-05 05:05:47,683 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) [2021-06-05 05:05:47,683 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 790 transitions. [2021-06-05 05:05:47,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:47,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:47,683 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:47,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15249 [2021-06-05 05:05:47,884 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:47,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:47,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1569572930, now seen corresponding path program 522 times [2021-06-05 05:05:47,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:47,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263284039] [2021-06-05 05:05:47,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:47,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263284039] [2021-06-05 05:05:47,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263284039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:47,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036676746] [2021-06-05 05:05:47,950 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 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 [2021-06-05 05:05:47,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:47,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:47,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:47,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:48,086 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 [2021-06-05 05:05:48,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:48,089 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 [2021-06-05 05:05:48,090 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:48,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:48,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:48,093 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 16 treesize of output 12 [2021-06-05 05:05:48,094 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:48,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:48,096 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 15 treesize of output 11 [2021-06-05 05:05:48,097 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:48,130 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:05:48,130 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:48,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:48,131 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:48,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:48,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036676746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:48,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:48,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:48,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479496441] [2021-06-05 05:05:48,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:48,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:48,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:48,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:48,180 INFO L87 Difference]: Start difference. First operand 304 states and 790 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) [2021-06-05 05:05:49,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:49,905 INFO L93 Difference]: Finished difference Result 692 states and 1463 transitions. [2021-06-05 05:05:49,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:05:49,906 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 [2021-06-05 05:05:49,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:49,906 INFO L225 Difference]: With dead ends: 692 [2021-06-05 05:05:49,906 INFO L226 Difference]: Without dead ends: 686 [2021-06-05 05:05:49,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 1533.4ms TimeCoverageRelationStatistics Valid=553, Invalid=4277, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:05:49,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-06-05 05:05:49,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 322. [2021-06-05 05:05:49,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:49,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-06-05 05:05:49,911 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-06-05 05:05:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:49,911 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-06-05 05:05:49,911 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) [2021-06-05 05:05:49,911 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-06-05 05:05:49,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:49,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:49,911 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:50,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15260 [2021-06-05 05:05:50,112 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:50,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:50,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1822728195, now seen corresponding path program 523 times [2021-06-05 05:05:50,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:50,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342058916] [2021-06-05 05:05:50,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:50,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:50,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:50,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342058916] [2021-06-05 05:05:50,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342058916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:50,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780594702] [2021-06-05 05:05:50,173 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 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 [2021-06-05 05:05:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:50,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:50,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:50,337 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 16 treesize of output 12 [2021-06-05 05:05:50,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:50,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:50,340 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 15 treesize of output 11 [2021-06-05 05:05:50,340 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:50,369 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:05:50,370 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:50,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:50,370 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:05:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:50,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780594702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:50,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:50,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:50,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933148057] [2021-06-05 05:05:50,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:50,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:50,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:50,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:50,413 INFO L87 Difference]: Start difference. First operand 322 states and 857 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:05:50,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:50,781 INFO L93 Difference]: Finished difference Result 451 states and 1069 transitions. [2021-06-05 05:05:50,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:05:50,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:05:50,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:50,782 INFO L225 Difference]: With dead ends: 451 [2021-06-05 05:05:50,782 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 05:05:50,782 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 333.5ms TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:05:50,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 05:05:50,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 322. [2021-06-05 05:05:50,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.6697819314641746) internal successors, (857), 321 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:50,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 857 transitions. [2021-06-05 05:05:50,786 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 857 transitions. Word has length 19 [2021-06-05 05:05:50,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:50,786 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 857 transitions. [2021-06-05 05:05:50,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:05:50,786 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 857 transitions. [2021-06-05 05:05:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:50,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:50,786 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:50,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15271,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:50,987 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:50,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:50,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2024901378, now seen corresponding path program 524 times [2021-06-05 05:05:50,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:50,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776475163] [2021-06-05 05:05:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:51,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:51,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:51,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776475163] [2021-06-05 05:05:51,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776475163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:51,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515245521] [2021-06-05 05:05:51,046 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 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 [2021-06-05 05:05:51,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:51,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:51,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:51,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:51,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:51,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:51,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:51,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:51,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:51,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:51,192 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 16 treesize of output 12 [2021-06-05 05:05:51,192 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:51,194 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:51,195 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:51,197 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 [2021-06-05 05:05:51,198 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:51,230 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:05:51,230 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:51,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:51,231 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:51,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515245521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:51,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:51,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:51,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545851593] [2021-06-05 05:05:51,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:51,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:51,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:51,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:51,272 INFO L87 Difference]: Start difference. First operand 322 states and 857 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) [2021-06-05 05:05:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:52,082 INFO L93 Difference]: Finished difference Result 566 states and 1274 transitions. [2021-06-05 05:05:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:05:52,082 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 [2021-06-05 05:05:52,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:52,083 INFO L225 Difference]: With dead ends: 566 [2021-06-05 05:05:52,083 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 05:05:52,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1347, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:05:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 05:05:52,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 316. [2021-06-05 05:05:52,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.6444444444444444) internal successors, (833), 315 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:52,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 833 transitions. [2021-06-05 05:05:52,087 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 833 transitions. Word has length 19 [2021-06-05 05:05:52,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:52,087 INFO L482 AbstractCegarLoop]: Abstraction has 316 states and 833 transitions. [2021-06-05 05:05:52,087 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) [2021-06-05 05:05:52,087 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 833 transitions. [2021-06-05 05:05:52,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:52,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:52,087 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:52,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15287,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:52,287 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash 42104133, now seen corresponding path program 525 times [2021-06-05 05:05:52,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:52,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072601782] [2021-06-05 05:05:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:52,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:52,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072601782] [2021-06-05 05:05:52,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072601782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:52,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725463572] [2021-06-05 05:05:52,341 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 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 [2021-06-05 05:05:52,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:05:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:52,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:52,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:52,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:52,514 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 16 treesize of output 12 [2021-06-05 05:05:52,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:52,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:52,517 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 15 treesize of output 11 [2021-06-05 05:05:52,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:52,547 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:05:52,547 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:52,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:52,548 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:05:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:52,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725463572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:52,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:52,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:52,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248622594] [2021-06-05 05:05:52,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:52,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:52,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:52,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:52,611 INFO L87 Difference]: Start difference. First operand 316 states and 833 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) [2021-06-05 05:05:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:53,282 INFO L93 Difference]: Finished difference Result 473 states and 1085 transitions. [2021-06-05 05:05:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:05:53,282 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 [2021-06-05 05:05:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:53,282 INFO L225 Difference]: With dead ends: 473 [2021-06-05 05:05:53,282 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 05:05:53,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 592.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:05:53,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 05:05:53,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 315. [2021-06-05 05:05:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.643312101910828) internal successors, (830), 314 states have internal predecessors, (830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 830 transitions. [2021-06-05 05:05:53,286 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 830 transitions. Word has length 19 [2021-06-05 05:05:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:53,286 INFO L482 AbstractCegarLoop]: Abstraction has 315 states and 830 transitions. [2021-06-05 05:05:53,286 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) [2021-06-05 05:05:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 830 transitions. [2021-06-05 05:05:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:53,286 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:53,286 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:53,487 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15297,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:53,487 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:53,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:53,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1489671576, now seen corresponding path program 526 times [2021-06-05 05:05:53,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:53,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185055461] [2021-06-05 05:05:53,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:53,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:53,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:53,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185055461] [2021-06-05 05:05:53,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185055461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:53,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101620296] [2021-06-05 05:05:53,549 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 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 [2021-06-05 05:05:53,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:05:53,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:53,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:53,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:53,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,691 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:53,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:53,694 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:53,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:05:53,695 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:53,715 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:05:53,715 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:53,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:05:53,716 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:05:53,737 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:53,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101620296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:53,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:53,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:53,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322763984] [2021-06-05 05:05:53,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:53,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:53,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:53,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:53,738 INFO L87 Difference]: Start difference. First operand 315 states and 830 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) [2021-06-05 05:05:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:54,197 INFO L93 Difference]: Finished difference Result 476 states and 1112 transitions. [2021-06-05 05:05:54,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:05:54,198 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 [2021-06-05 05:05:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:54,198 INFO L225 Difference]: With dead ends: 476 [2021-06-05 05:05:54,198 INFO L226 Difference]: Without dead ends: 476 [2021-06-05 05:05:54,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:05:54,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-06-05 05:05:54,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 312. [2021-06-05 05:05:54,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:54,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-06-05 05:05:54,201 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-06-05 05:05:54,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:54,201 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-06-05 05:05:54,202 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) [2021-06-05 05:05:54,202 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-06-05 05:05:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:54,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:54,202 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:54,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15316,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:54,402 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:54,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:54,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1117815289, now seen corresponding path program 527 times [2021-06-05 05:05:54,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:54,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65215825] [2021-06-05 05:05:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:54,462 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:54,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:54,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65215825] [2021-06-05 05:05:54,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65215825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:54,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120437923] [2021-06-05 05:05:54,462 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 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 [2021-06-05 05:05:54,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:05:54,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:54,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:54,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:54,635 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 [2021-06-05 05:05:54,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,638 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 [2021-06-05 05:05:54,639 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,641 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 [2021-06-05 05:05:54,642 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:54,677 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:05:54,677 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:54,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:05:54,678 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:05:54,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:54,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120437923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:54,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:54,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:05:54,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696422401] [2021-06-05 05:05:54,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:05:54,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:05:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:05:54,705 INFO L87 Difference]: Start difference. First operand 312 states and 815 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) [2021-06-05 05:05:55,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:55,111 INFO L93 Difference]: Finished difference Result 381 states and 925 transitions. [2021-06-05 05:05:55,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:05:55,111 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 [2021-06-05 05:05:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:55,112 INFO L225 Difference]: With dead ends: 381 [2021-06-05 05:05:55,112 INFO L226 Difference]: Without dead ends: 373 [2021-06-05 05:05:55,112 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 429.6ms TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:05:55,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-06-05 05:05:55,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 311. [2021-06-05 05:05:55,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:55,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-06-05 05:05:55,115 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-06-05 05:05:55,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:55,115 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-06-05 05:05:55,115 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) [2021-06-05 05:05:55,115 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-06-05 05:05:55,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:55,115 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:55,115 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:55,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15320,531 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:55,316 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:55,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:55,316 INFO L82 PathProgramCache]: Analyzing trace with hash -529337132, now seen corresponding path program 528 times [2021-06-05 05:05:55,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:55,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803698784] [2021-06-05 05:05:55,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:55,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:55,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803698784] [2021-06-05 05:05:55,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803698784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:55,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54327218] [2021-06-05 05:05:55,383 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 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 [2021-06-05 05:05:55,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:05:55,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:55,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:55,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:55,532 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:55,532 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 16 treesize of output 12 [2021-06-05 05:05:55,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:55,535 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 [2021-06-05 05:05:55,536 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:55,538 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 [2021-06-05 05:05:55,539 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:55,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:55,541 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 15 treesize of output 11 [2021-06-05 05:05:55,542 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:55,575 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:05:55,575 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:55,576 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:55,576 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:55,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54327218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:55,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:55,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:55,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095657891] [2021-06-05 05:05:55,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:55,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:55,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:55,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:55,626 INFO L87 Difference]: Start difference. First operand 311 states and 812 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) [2021-06-05 05:05:57,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:57,848 INFO L93 Difference]: Finished difference Result 627 states and 1370 transitions. [2021-06-05 05:05:57,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:05:57,849 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 [2021-06-05 05:05:57,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:57,849 INFO L225 Difference]: With dead ends: 627 [2021-06-05 05:05:57,849 INFO L226 Difference]: Without dead ends: 621 [2021-06-05 05:05:57,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 2064.3ms TimeCoverageRelationStatistics Valid=634, Invalid=3656, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:05:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-06-05 05:05:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 324. [2021-06-05 05:05:57,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 2.653250773993808) internal successors, (857), 323 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 857 transitions. [2021-06-05 05:05:57,853 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 857 transitions. Word has length 19 [2021-06-05 05:05:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:57,853 INFO L482 AbstractCegarLoop]: Abstraction has 324 states and 857 transitions. [2021-06-05 05:05:57,853 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) [2021-06-05 05:05:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 857 transitions. [2021-06-05 05:05:57,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:57,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:57,854 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:58,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15333,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:58,054 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:58,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:58,054 INFO L82 PathProgramCache]: Analyzing trace with hash -782492397, now seen corresponding path program 529 times [2021-06-05 05:05:58,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:58,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343939660] [2021-06-05 05:05:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:58,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:58,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:58,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343939660] [2021-06-05 05:05:58,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343939660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:58,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031286423] [2021-06-05 05:05:58,121 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 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 [2021-06-05 05:05:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:58,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:58,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:58,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:58,311 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 16 treesize of output 12 [2021-06-05 05:05:58,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:58,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:58,314 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 15 treesize of output 11 [2021-06-05 05:05:58,314 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:58,343 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:05:58,343 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:58,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:58,344 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:05:58,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:58,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031286423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:58,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:58,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:58,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507503783] [2021-06-05 05:05:58,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:58,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:58,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:58,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:58,387 INFO L87 Difference]: Start difference. First operand 324 states and 857 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) [2021-06-05 05:05:58,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:05:58,865 INFO L93 Difference]: Finished difference Result 431 states and 1027 transitions. [2021-06-05 05:05:58,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:05:58,865 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 [2021-06-05 05:05:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:05:58,865 INFO L225 Difference]: With dead ends: 431 [2021-06-05 05:05:58,865 INFO L226 Difference]: Without dead ends: 425 [2021-06-05 05:05:58,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:05:58,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2021-06-05 05:05:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 323. [2021-06-05 05:05:58,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.6490683229813663) internal successors, (853), 322 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:05:58,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 853 transitions. [2021-06-05 05:05:58,868 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 853 transitions. Word has length 19 [2021-06-05 05:05:58,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:05:58,869 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 853 transitions. [2021-06-05 05:05:58,869 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) [2021-06-05 05:05:58,869 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 853 transitions. [2021-06-05 05:05:58,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:05:58,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:05:58,869 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:05:59,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15344,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:05:59,069 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:05:59,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:05:59,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1229830120, now seen corresponding path program 530 times [2021-06-05 05:05:59,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:05:59,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432987806] [2021-06-05 05:05:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:05:59,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:05:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:05:59,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:05:59,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432987806] [2021-06-05 05:05:59,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432987806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:59,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464334758] [2021-06-05 05:05:59,136 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 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 [2021-06-05 05:05:59,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:05:59,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:05:59,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:05:59,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:05:59,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:59,276 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:59,276 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 15 treesize of output 11 [2021-06-05 05:05:59,277 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:59,279 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:05:59,279 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:59,281 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 [2021-06-05 05:05:59,282 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:59,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:05:59,285 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 [2021-06-05 05:05:59,285 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:05:59,317 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:05:59,317 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:05:59,317 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:05:59,317 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:05:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:05:59,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464334758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:05:59,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:05:59,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:05:59,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077977807] [2021-06-05 05:05:59,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:05:59,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:05:59,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:05:59,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:05:59,363 INFO L87 Difference]: Start difference. First operand 323 states and 853 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) [2021-06-05 05:06:00,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:00,447 INFO L93 Difference]: Finished difference Result 553 states and 1248 transitions. [2021-06-05 05:06:00,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:06:00,448 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 [2021-06-05 05:06:00,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:00,448 INFO L225 Difference]: With dead ends: 553 [2021-06-05 05:06:00,448 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 05:06:00,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1047.6ms TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:06:00,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 05:06:00,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 312. [2021-06-05 05:06:00,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.620578778135048) internal successors, (815), 311 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 815 transitions. [2021-06-05 05:06:00,452 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 815 transitions. Word has length 19 [2021-06-05 05:06:00,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:00,452 INFO L482 AbstractCegarLoop]: Abstraction has 312 states and 815 transitions. [2021-06-05 05:06:00,452 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) [2021-06-05 05:06:00,452 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 815 transitions. [2021-06-05 05:06:00,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:00,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:00,452 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:00,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15360,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:00,653 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 1082339931, now seen corresponding path program 531 times [2021-06-05 05:06:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816247435] [2021-06-05 05:06:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:00,721 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:00,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:00,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816247435] [2021-06-05 05:06:00,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816247435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:00,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519528514] [2021-06-05 05:06:00,721 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 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 [2021-06-05 05:06:00,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:06:00,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:00,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:00,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:00,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:00,930 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 16 treesize of output 12 [2021-06-05 05:06:00,931 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:00,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:00,933 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 [2021-06-05 05:06:00,934 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:00,962 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:00,962 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:00,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:00,963 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:01,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:01,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519528514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:01,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:01,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:01,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133113999] [2021-06-05 05:06:01,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:01,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:01,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:01,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:01,026 INFO L87 Difference]: Start difference. First operand 312 states and 815 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) [2021-06-05 05:06:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:01,697 INFO L93 Difference]: Finished difference Result 397 states and 952 transitions. [2021-06-05 05:06:01,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:06:01,697 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 [2021-06-05 05:06:01,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:01,698 INFO L225 Difference]: With dead ends: 397 [2021-06-05 05:06:01,698 INFO L226 Difference]: Without dead ends: 393 [2021-06-05 05:06:01,698 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 680.4ms TimeCoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:06:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-06-05 05:06:01,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 311. [2021-06-05 05:06:01,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.6193548387096772) internal successors, (812), 310 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:01,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 812 transitions. [2021-06-05 05:06:01,701 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 812 transitions. Word has length 19 [2021-06-05 05:06:01,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:01,701 INFO L482 AbstractCegarLoop]: Abstraction has 311 states and 812 transitions. [2021-06-05 05:06:01,701 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) [2021-06-05 05:06:01,701 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 812 transitions. [2021-06-05 05:06:01,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:01,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:01,701 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:01,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15369 [2021-06-05 05:06:01,901 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:01,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:01,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1765059922, now seen corresponding path program 532 times [2021-06-05 05:06:01,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:01,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575071152] [2021-06-05 05:06:01,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:01,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:01,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:01,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575071152] [2021-06-05 05:06:01,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575071152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:01,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596788611] [2021-06-05 05:06:01,970 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 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 [2021-06-05 05:06:01,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:01,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:01,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:01,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:02,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:02,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:02,120 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 15 treesize of output 11 [2021-06-05 05:06:02,121 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:02,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:02,123 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 16 treesize of output 12 [2021-06-05 05:06:02,123 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:02,144 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:02,144 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:02,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:02,144 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:02,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:02,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596788611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:02,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:02,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:02,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16797102] [2021-06-05 05:06:02,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:02,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:02,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:02,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:02,166 INFO L87 Difference]: Start difference. First operand 311 states and 812 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) [2021-06-05 05:06:03,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:03,106 INFO L93 Difference]: Finished difference Result 437 states and 1047 transitions. [2021-06-05 05:06:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:06:03,106 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 [2021-06-05 05:06:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:03,107 INFO L225 Difference]: With dead ends: 437 [2021-06-05 05:06:03,107 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 05:06:03,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 928.2ms TimeCoverageRelationStatistics Valid=287, Invalid=1435, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:06:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 05:06:03,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 305. [2021-06-05 05:06:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.601973684210526) internal successors, (791), 304 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:03,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 791 transitions. [2021-06-05 05:06:03,110 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 791 transitions. Word has length 19 [2021-06-05 05:06:03,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:03,110 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 791 transitions. [2021-06-05 05:06:03,110 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) [2021-06-05 05:06:03,110 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 791 transitions. [2021-06-05 05:06:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:03,110 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:03,110 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:03,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15388,536 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:03,311 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:03,311 INFO L82 PathProgramCache]: Analyzing trace with hash -2136916209, now seen corresponding path program 533 times [2021-06-05 05:06:03,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:03,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911554839] [2021-06-05 05:06:03,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:03,384 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:03,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911554839] [2021-06-05 05:06:03,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911554839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:03,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690556529] [2021-06-05 05:06:03,385 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 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 [2021-06-05 05:06:03,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:03,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:03,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:03,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:03,569 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 [2021-06-05 05:06:03,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,573 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 [2021-06-05 05:06:03,573 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:03,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:03,576 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:03,609 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:03,609 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:03,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:03,610 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:03,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690556529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:03,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:03,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:03,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572492427] [2021-06-05 05:06:03,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:03,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:03,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:03,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:03,637 INFO L87 Difference]: Start difference. First operand 305 states and 791 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) [2021-06-05 05:06:04,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:04,068 INFO L93 Difference]: Finished difference Result 331 states and 831 transitions. [2021-06-05 05:06:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:04,068 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 [2021-06-05 05:06:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:04,069 INFO L225 Difference]: With dead ends: 331 [2021-06-05 05:06:04,069 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 05:06:04,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 474.6ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:06:04,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 05:06:04,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 304. [2021-06-05 05:06:04,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.6006600660066006) internal successors, (788), 303 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:04,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 788 transitions. [2021-06-05 05:06:04,072 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 788 transitions. Word has length 19 [2021-06-05 05:06:04,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:04,072 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 788 transitions. [2021-06-05 05:06:04,072 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) [2021-06-05 05:06:04,072 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 788 transitions. [2021-06-05 05:06:04,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:04,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:04,072 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:04,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15392,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:04,272 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:04,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:04,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1177314600, now seen corresponding path program 534 times [2021-06-05 05:06:04,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:04,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791381340] [2021-06-05 05:06:04,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:04,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:04,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:04,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791381340] [2021-06-05 05:06:04,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791381340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:04,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729836813] [2021-06-05 05:06:04,341 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 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 [2021-06-05 05:06:04,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:06:04,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:04,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:04,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:04,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:04,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:04,490 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 15 treesize of output 11 [2021-06-05 05:06:04,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:04,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:04,493 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 16 treesize of output 12 [2021-06-05 05:06:04,494 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:04,514 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:04,514 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:04,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:04,515 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:04,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:04,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729836813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:04,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:04,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:04,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784732456] [2021-06-05 05:06:04,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:04,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:04,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:04,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:04,538 INFO L87 Difference]: Start difference. First operand 304 states and 788 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) [2021-06-05 05:06:04,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:04,887 INFO L93 Difference]: Finished difference Result 376 states and 920 transitions. [2021-06-05 05:06:04,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:04,887 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 [2021-06-05 05:06:04,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:04,888 INFO L225 Difference]: With dead ends: 376 [2021-06-05 05:06:04,888 INFO L226 Difference]: Without dead ends: 376 [2021-06-05 05:06:04,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 293.8ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:06:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-06-05 05:06:04,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 298. [2021-06-05 05:06:04,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 2.585858585858586) internal successors, (768), 297 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:04,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 768 transitions. [2021-06-05 05:06:04,891 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 768 transitions. Word has length 19 [2021-06-05 05:06:04,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:04,891 INFO L482 AbstractCegarLoop]: Abstraction has 298 states and 768 transitions. [2021-06-05 05:06:04,891 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) [2021-06-05 05:06:04,891 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 768 transitions. [2021-06-05 05:06:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:04,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:04,891 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:05,091 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15405 [2021-06-05 05:06:05,092 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:05,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:05,092 INFO L82 PathProgramCache]: Analyzing trace with hash 1145358555, now seen corresponding path program 535 times [2021-06-05 05:06:05,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:05,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394108426] [2021-06-05 05:06:05,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:05,162 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:05,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394108426] [2021-06-05 05:06:05,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394108426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:05,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567271102] [2021-06-05 05:06:05,163 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 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 [2021-06-05 05:06:05,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:05,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:05,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:05,343 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 [2021-06-05 05:06:05,344 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:05,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:05,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:05,347 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 16 treesize of output 12 [2021-06-05 05:06:05,348 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:05,350 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 [2021-06-05 05:06:05,351 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:05,385 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:05,385 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:05,386 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:05,386 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:05,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567271102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:05,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:05,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:05,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050081436] [2021-06-05 05:06:05,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:05,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:05,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:05,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:05,414 INFO L87 Difference]: Start difference. First operand 298 states and 768 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) [2021-06-05 05:06:05,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:05,783 INFO L93 Difference]: Finished difference Result 317 states and 796 transitions. [2021-06-05 05:06:05,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:05,784 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 [2021-06-05 05:06:05,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:05,784 INFO L225 Difference]: With dead ends: 317 [2021-06-05 05:06:05,784 INFO L226 Difference]: Without dead ends: 305 [2021-06-05 05:06:05,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 391.6ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:06:05,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2021-06-05 05:06:05,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 297. [2021-06-05 05:06:05,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 296 states have (on average 2.5844594594594597) internal successors, (765), 296 states have internal predecessors, (765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:05,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 765 transitions. [2021-06-05 05:06:05,787 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 765 transitions. Word has length 19 [2021-06-05 05:06:05,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:05,787 INFO L482 AbstractCegarLoop]: Abstraction has 297 states and 765 transitions. [2021-06-05 05:06:05,787 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) [2021-06-05 05:06:05,787 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 765 transitions. [2021-06-05 05:06:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:05,787 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:05,787 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:05,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15409,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:05,988 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:05,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:05,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1653201534, now seen corresponding path program 536 times [2021-06-05 05:06:05,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:05,988 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642352435] [2021-06-05 05:06:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:05,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:06,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:06,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642352435] [2021-06-05 05:06:06,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642352435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:06,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452356336] [2021-06-05 05:06:06,070 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 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 [2021-06-05 05:06:06,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:06,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:06,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:06,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:06,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:06,227 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 [2021-06-05 05:06:06,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:06,230 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 [2021-06-05 05:06:06,231 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:06,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:06,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:06,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:06,234 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:06,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:06,236 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:06,269 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:06:06,269 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:06,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:06,270 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:06:06,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:06,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452356336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:06,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:06,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:06,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119909489] [2021-06-05 05:06:06,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:06,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:06,324 INFO L87 Difference]: Start difference. First operand 297 states and 765 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) [2021-06-05 05:06:07,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:07,253 INFO L93 Difference]: Finished difference Result 376 states and 903 transitions. [2021-06-05 05:06:07,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:07,254 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 [2021-06-05 05:06:07,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:07,254 INFO L225 Difference]: With dead ends: 376 [2021-06-05 05:06:07,254 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 05:06:07,254 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 905.7ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:06:07,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 05:06:07,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 305. [2021-06-05 05:06:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 05:06:07,260 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 05:06:07,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:07,260 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 05:06:07,261 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) [2021-06-05 05:06:07,261 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 05:06:07,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:07,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:07,261 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:07,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15422,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:07,461 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:07,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:07,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1400046269, now seen corresponding path program 537 times [2021-06-05 05:06:07,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:07,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783976872] [2021-06-05 05:06:07,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:07,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783976872] [2021-06-05 05:06:07,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783976872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:07,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523862937] [2021-06-05 05:06:07,544 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 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 [2021-06-05 05:06:07,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:06:07,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:07,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:07,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:07,739 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:07,739 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 15 treesize of output 11 [2021-06-05 05:06:07,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:07,742 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 16 treesize of output 12 [2021-06-05 05:06:07,743 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:07,772 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:07,772 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:07,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:07,773 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:07,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523862937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:07,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:07,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:07,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240516478] [2021-06-05 05:06:07,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:07,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:07,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:07,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:07,832 INFO L87 Difference]: Start difference. First operand 305 states and 790 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) [2021-06-05 05:06:08,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:08,264 INFO L93 Difference]: Finished difference Result 389 states and 930 transitions. [2021-06-05 05:06:08,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:08,264 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 19 [2021-06-05 05:06:08,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:08,265 INFO L225 Difference]: With dead ends: 389 [2021-06-05 05:06:08,265 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 05:06:08,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:06:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 05:06:08,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-06-05 05:06:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 05:06:08,268 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 05:06:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:08,268 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 05:06:08,268 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) [2021-06-05 05:06:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 05:06:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:08,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:08,269 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:08,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15433,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:08,469 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:08,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:08,469 INFO L82 PathProgramCache]: Analyzing trace with hash 952708546, now seen corresponding path program 538 times [2021-06-05 05:06:08,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:08,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337323918] [2021-06-05 05:06:08,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:08,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337323918] [2021-06-05 05:06:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337323918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019612484] [2021-06-05 05:06:08,551 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 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 [2021-06-05 05:06:08,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:08,706 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 [2021-06-05 05:06:08,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:08,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:08,715 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 [2021-06-05 05:06:08,716 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,718 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 [2021-06-05 05:06:08,719 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:08,721 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 15 treesize of output 11 [2021-06-05 05:06:08,722 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:08,756 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:06:08,756 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:08,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:08,757 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:06:08,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:08,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019612484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:08,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:08,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:08,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635809518] [2021-06-05 05:06:08,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:08,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:08,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:08,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:08,803 INFO L87 Difference]: Start difference. First operand 305 states and 790 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) [2021-06-05 05:06:09,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:09,606 INFO L93 Difference]: Finished difference Result 389 states and 935 transitions. [2021-06-05 05:06:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:09,606 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 [2021-06-05 05:06:09,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:09,606 INFO L225 Difference]: With dead ends: 389 [2021-06-05 05:06:09,606 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 05:06:09,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 761.4ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:06:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 05:06:09,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 305. [2021-06-05 05:06:09,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.598684210526316) internal successors, (790), 304 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 790 transitions. [2021-06-05 05:06:09,609 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 790 transitions. Word has length 19 [2021-06-05 05:06:09,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:09,609 INFO L482 AbstractCegarLoop]: Abstraction has 305 states and 790 transitions. [2021-06-05 05:06:09,610 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) [2021-06-05 05:06:09,610 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 790 transitions. [2021-06-05 05:06:09,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:09,610 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:09,610 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:09,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15449,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:09,810 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:09,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:09,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1030088699, now seen corresponding path program 539 times [2021-06-05 05:06:09,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:09,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052707009] [2021-06-05 05:06:09,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:09,891 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:09,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:09,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052707009] [2021-06-05 05:06:09,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052707009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:09,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284189436] [2021-06-05 05:06:09,891 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 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 [2021-06-05 05:06:09,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:09,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:09,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:10,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:10,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:10,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:10,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:10,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:10,081 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 16 treesize of output 12 [2021-06-05 05:06:10,081 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:10,109 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:10,109 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:10,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:10,110 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:10,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:10,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284189436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:10,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:10,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:10,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480205063] [2021-06-05 05:06:10,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:10,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:10,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:10,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:10,178 INFO L87 Difference]: Start difference. First operand 305 states and 790 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) [2021-06-05 05:06:10,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:10,734 INFO L93 Difference]: Finished difference Result 393 states and 932 transitions. [2021-06-05 05:06:10,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:10,735 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 [2021-06-05 05:06:10,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:10,735 INFO L225 Difference]: With dead ends: 393 [2021-06-05 05:06:10,735 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 05:06:10,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 595.4ms TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:06:10,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 05:06:10,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 304. [2021-06-05 05:06:10,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:10,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-06-05 05:06:10,738 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-06-05 05:06:10,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:10,738 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-06-05 05:06:10,738 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) [2021-06-05 05:06:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-06-05 05:06:10,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:10,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:10,739 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:10,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15458 [2021-06-05 05:06:10,939 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:10,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:10,939 INFO L82 PathProgramCache]: Analyzing trace with hash 417478744, now seen corresponding path program 540 times [2021-06-05 05:06:10,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:10,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759972324] [2021-06-05 05:06:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:11,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:11,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759972324] [2021-06-05 05:06:11,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759972324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:11,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530777768] [2021-06-05 05:06:11,023 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 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 [2021-06-05 05:06:11,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:11,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:11,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:11,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:11,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:11,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:11,185 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 15 treesize of output 11 [2021-06-05 05:06:11,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:11,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:11,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:11,189 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:11,210 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:11,210 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:11,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:11,211 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:11,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:11,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530777768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:11,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:11,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:11,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024850561] [2021-06-05 05:06:11,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:11,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:11,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:11,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:11,234 INFO L87 Difference]: Start difference. First operand 304 states and 787 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) [2021-06-05 05:06:12,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:12,088 INFO L93 Difference]: Finished difference Result 379 states and 929 transitions. [2021-06-05 05:06:12,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:12,088 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 [2021-06-05 05:06:12,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:12,088 INFO L225 Difference]: With dead ends: 379 [2021-06-05 05:06:12,088 INFO L226 Difference]: Without dead ends: 379 [2021-06-05 05:06:12,088 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 804.7ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:06:12,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-06-05 05:06:12,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 304. [2021-06-05 05:06:12,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.597359735973597) internal successors, (787), 303 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 787 transitions. [2021-06-05 05:06:12,091 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 787 transitions. Word has length 19 [2021-06-05 05:06:12,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:12,091 INFO L482 AbstractCegarLoop]: Abstraction has 304 states and 787 transitions. [2021-06-05 05:06:12,091 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) [2021-06-05 05:06:12,091 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 787 transitions. [2021-06-05 05:06:12,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:12,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:12,092 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:12,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15471,544 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:12,292 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:12,292 INFO L82 PathProgramCache]: Analyzing trace with hash 45622457, now seen corresponding path program 541 times [2021-06-05 05:06:12,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:12,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627586644] [2021-06-05 05:06:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:12,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:12,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627586644] [2021-06-05 05:06:12,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627586644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:12,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912022952] [2021-06-05 05:06:12,377 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 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 [2021-06-05 05:06:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:12,582 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 [2021-06-05 05:06:12,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:12,585 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 [2021-06-05 05:06:12,586 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:12,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:12,589 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 [2021-06-05 05:06:12,589 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:12,623 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:12,623 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:12,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:12,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:12,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:12,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912022952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:12,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:12,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:12,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874965145] [2021-06-05 05:06:12,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:12,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:12,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:12,656 INFO L87 Difference]: Start difference. First operand 304 states and 787 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) [2021-06-05 05:06:13,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:13,006 INFO L93 Difference]: Finished difference Result 334 states and 833 transitions. [2021-06-05 05:06:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:06:13,006 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 [2021-06-05 05:06:13,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:13,006 INFO L225 Difference]: With dead ends: 334 [2021-06-05 05:06:13,007 INFO L226 Difference]: Without dead ends: 326 [2021-06-05 05:06:13,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:06:13,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-06-05 05:06:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 303. [2021-06-05 05:06:13,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:13,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-06-05 05:06:13,009 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-06-05 05:06:13,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:13,010 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-06-05 05:06:13,010 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) [2021-06-05 05:06:13,010 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-06-05 05:06:13,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:13,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:13,010 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:13,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15475 [2021-06-05 05:06:13,210 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1005224066, now seen corresponding path program 542 times [2021-06-05 05:06:13,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:13,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739305011] [2021-06-05 05:06:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:13,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:13,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739305011] [2021-06-05 05:06:13,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739305011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:13,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999563701] [2021-06-05 05:06:13,294 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 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 [2021-06-05 05:06:13,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:13,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:13,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:13,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,470 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 16 treesize of output 12 [2021-06-05 05:06:13,470 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:13,472 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 15 treesize of output 11 [2021-06-05 05:06:13,473 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,494 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:13,494 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:13,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:13,495 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:13,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999563701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:13,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:13,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:13,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382545740] [2021-06-05 05:06:13,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:13,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:13,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:13,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:13,518 INFO L87 Difference]: Start difference. First operand 303 states and 784 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) [2021-06-05 05:06:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:13,913 INFO L93 Difference]: Finished difference Result 358 states and 888 transitions. [2021-06-05 05:06:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:13,913 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 [2021-06-05 05:06:13,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:13,914 INFO L225 Difference]: With dead ends: 358 [2021-06-05 05:06:13,914 INFO L226 Difference]: Without dead ends: 358 [2021-06-05 05:06:13,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 436.4ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:06:13,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-06-05 05:06:13,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 303. [2021-06-05 05:06:13,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.596026490066225) internal successors, (784), 302 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:13,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 784 transitions. [2021-06-05 05:06:13,917 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 784 transitions. Word has length 19 [2021-06-05 05:06:13,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:13,917 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 784 transitions. [2021-06-05 05:06:13,917 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) [2021-06-05 05:06:13,917 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 784 transitions. [2021-06-05 05:06:13,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:13,917 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:13,917 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:14,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15488,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:14,117 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash -967070075, now seen corresponding path program 543 times [2021-06-05 05:06:14,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:14,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131536743] [2021-06-05 05:06:14,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:14,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:14,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:14,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131536743] [2021-06-05 05:06:14,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131536743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:14,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283810891] [2021-06-05 05:06:14,209 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 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 [2021-06-05 05:06:14,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:06:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:14,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:14,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:14,406 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 7 treesize of output 5 [2021-06-05 05:06:14,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:14,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:14,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:14,409 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 16 treesize of output 12 [2021-06-05 05:06:14,410 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:14,412 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 [2021-06-05 05:06:14,413 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:14,446 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:14,446 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:14,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:14,447 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:14,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283810891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:14,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:14,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:14,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510053734] [2021-06-05 05:06:14,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:14,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:14,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:14,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:14,475 INFO L87 Difference]: Start difference. First operand 303 states and 784 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) [2021-06-05 05:06:14,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:14,718 INFO L93 Difference]: Finished difference Result 327 states and 821 transitions. [2021-06-05 05:06:14,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:14,718 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 [2021-06-05 05:06:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:14,719 INFO L225 Difference]: With dead ends: 327 [2021-06-05 05:06:14,719 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:06:14,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 327.1ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:06:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:06:14,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 306. [2021-06-05 05:06:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 2.580327868852459) internal successors, (787), 305 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:14,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 787 transitions. [2021-06-05 05:06:14,722 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 787 transitions. Word has length 19 [2021-06-05 05:06:14,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:14,722 INFO L482 AbstractCegarLoop]: Abstraction has 306 states and 787 transitions. [2021-06-05 05:06:14,722 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) [2021-06-05 05:06:14,722 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 787 transitions. [2021-06-05 05:06:14,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:14,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:14,722 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:14,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15492,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:14,923 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:14,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:14,923 INFO L82 PathProgramCache]: Analyzing trace with hash 2045459864, now seen corresponding path program 544 times [2021-06-05 05:06:14,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:14,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426447883] [2021-06-05 05:06:14,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:15,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:15,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:15,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426447883] [2021-06-05 05:06:15,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426447883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716482608] [2021-06-05 05:06:15,006 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 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 [2021-06-05 05:06:15,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:15,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:15,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:15,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:15,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:15,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:15,162 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 15 treesize of output 11 [2021-06-05 05:06:15,163 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:15,165 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 16 treesize of output 12 [2021-06-05 05:06:15,166 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,186 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:15,186 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:15,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,187 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:15,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716482608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:15,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:15,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254997410] [2021-06-05 05:06:15,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:15,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:15,209 INFO L87 Difference]: Start difference. First operand 306 states and 787 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) [2021-06-05 05:06:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:15,404 INFO L93 Difference]: Finished difference Result 351 states and 870 transitions. [2021-06-05 05:06:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:15,404 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 [2021-06-05 05:06:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:15,404 INFO L225 Difference]: With dead ends: 351 [2021-06-05 05:06:15,404 INFO L226 Difference]: Without dead ends: 351 [2021-06-05 05:06:15,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-06-05 05:06:15,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 303. [2021-06-05 05:06:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.5728476821192054) internal successors, (777), 302 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:15,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 777 transitions. [2021-06-05 05:06:15,407 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 777 transitions. Word has length 19 [2021-06-05 05:06:15,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:15,407 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 777 transitions. [2021-06-05 05:06:15,407 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) [2021-06-05 05:06:15,407 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 777 transitions. [2021-06-05 05:06:15,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:15,408 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:15,408 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:15,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 548 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15507 [2021-06-05 05:06:15,608 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:15,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:15,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1999199801, now seen corresponding path program 545 times [2021-06-05 05:06:15,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:15,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191489393] [2021-06-05 05:06:15,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:15,695 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:15,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:15,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191489393] [2021-06-05 05:06:15,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191489393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376377121] [2021-06-05 05:06:15,695 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 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 [2021-06-05 05:06:15,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:15,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:15,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:15,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:15,884 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 [2021-06-05 05:06:15,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,887 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 [2021-06-05 05:06:15,887 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:15,890 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 16 treesize of output 12 [2021-06-05 05:06:15,890 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:15,925 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:15,925 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:15,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:15,926 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:15,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:15,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376377121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:15,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:15,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:15,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285864602] [2021-06-05 05:06:15,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:15,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:15,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:15,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:15,955 INFO L87 Difference]: Start difference. First operand 303 states and 777 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) [2021-06-05 05:06:16,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:16,115 INFO L93 Difference]: Finished difference Result 325 states and 809 transitions. [2021-06-05 05:06:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:16,115 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 [2021-06-05 05:06:16,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:16,115 INFO L225 Difference]: With dead ends: 325 [2021-06-05 05:06:16,115 INFO L226 Difference]: Without dead ends: 309 [2021-06-05 05:06:16,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-06-05 05:06:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 303. [2021-06-05 05:06:16,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 2.566225165562914) internal successors, (775), 302 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 775 transitions. [2021-06-05 05:06:16,118 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 775 transitions. Word has length 19 [2021-06-05 05:06:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:16,118 INFO L482 AbstractCegarLoop]: Abstraction has 303 states and 775 transitions. [2021-06-05 05:06:16,118 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) [2021-06-05 05:06:16,118 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 775 transitions. [2021-06-05 05:06:16,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:16,119 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:16,119 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:16,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 549 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15511 [2021-06-05 05:06:16,319 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:16,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:16,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2021031274, now seen corresponding path program 546 times [2021-06-05 05:06:16,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:16,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282863169] [2021-06-05 05:06:16,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:16,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282863169] [2021-06-05 05:06:16,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282863169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:16,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673759001] [2021-06-05 05:06:16,402 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 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 [2021-06-05 05:06:16,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:06:16,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:16,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:16,596 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 [2021-06-05 05:06:16,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:16,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:16,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:16,600 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 16 treesize of output 12 [2021-06-05 05:06:16,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:16,602 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 [2021-06-05 05:06:16,603 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:16,637 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:16,638 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:16,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:16,638 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:16,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:16,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673759001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:16,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:16,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:16,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602045956] [2021-06-05 05:06:16,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:16,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:16,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:16,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:16,667 INFO L87 Difference]: Start difference. First operand 303 states and 775 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) [2021-06-05 05:06:17,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:17,061 INFO L93 Difference]: Finished difference Result 421 states and 959 transitions. [2021-06-05 05:06:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:06:17,062 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 [2021-06-05 05:06:17,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:17,062 INFO L225 Difference]: With dead ends: 421 [2021-06-05 05:06:17,062 INFO L226 Difference]: Without dead ends: 406 [2021-06-05 05:06:17,062 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:06:17,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-06-05 05:06:17,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 309. [2021-06-05 05:06:17,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 308 states have (on average 2.5551948051948052) internal successors, (787), 308 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:17,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 787 transitions. [2021-06-05 05:06:17,065 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 787 transitions. Word has length 19 [2021-06-05 05:06:17,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:17,065 INFO L482 AbstractCegarLoop]: Abstraction has 309 states and 787 transitions. [2021-06-05 05:06:17,065 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) [2021-06-05 05:06:17,066 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 787 transitions. [2021-06-05 05:06:17,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:17,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:17,066 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:17,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15524 [2021-06-05 05:06:17,266 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:17,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:17,267 INFO L82 PathProgramCache]: Analyzing trace with hash -2059863861, now seen corresponding path program 547 times [2021-06-05 05:06:17,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:17,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92584656] [2021-06-05 05:06:17,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:17,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:17,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:17,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92584656] [2021-06-05 05:06:17,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92584656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:17,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029566793] [2021-06-05 05:06:17,349 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 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 [2021-06-05 05:06:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:17,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:17,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:17,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:17,506 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 [2021-06-05 05:06:17,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:17,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:17,509 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 [2021-06-05 05:06:17,510 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:17,530 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:17,530 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:17,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:17,531 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:17,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:17,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029566793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:17,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:17,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:17,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443092799] [2021-06-05 05:06:17,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:17,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:17,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:17,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:17,552 INFO L87 Difference]: Start difference. First operand 309 states and 787 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) [2021-06-05 05:06:17,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:17,772 INFO L93 Difference]: Finished difference Result 458 states and 1048 transitions. [2021-06-05 05:06:17,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:17,772 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 19 [2021-06-05 05:06:17,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:17,773 INFO L225 Difference]: With dead ends: 458 [2021-06-05 05:06:17,773 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 05:06:17,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 225.8ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:17,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 05:06:17,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 323. [2021-06-05 05:06:17,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.5527950310559007) internal successors, (822), 322 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:17,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 822 transitions. [2021-06-05 05:06:17,776 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 822 transitions. Word has length 19 [2021-06-05 05:06:17,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:17,776 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 822 transitions. [2021-06-05 05:06:17,776 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) [2021-06-05 05:06:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 822 transitions. [2021-06-05 05:06:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:17,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:17,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:17,977 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15537 [2021-06-05 05:06:17,977 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:17,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1414450266, now seen corresponding path program 548 times [2021-06-05 05:06:17,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:17,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802457145] [2021-06-05 05:06:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:18,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:18,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:18,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802457145] [2021-06-05 05:06:18,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802457145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:18,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633051308] [2021-06-05 05:06:18,060 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 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 [2021-06-05 05:06:18,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:18,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:18,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:18,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:18,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:18,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:18,259 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 [2021-06-05 05:06:18,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:18,262 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 [2021-06-05 05:06:18,263 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:18,265 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 [2021-06-05 05:06:18,266 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:18,299 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:18,299 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:18,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:18,300 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:18,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:18,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633051308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:18,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:18,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:18,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773352802] [2021-06-05 05:06:18,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:18,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:18,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:18,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:18,328 INFO L87 Difference]: Start difference. First operand 323 states and 822 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) [2021-06-05 05:06:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:18,869 INFO L93 Difference]: Finished difference Result 466 states and 1043 transitions. [2021-06-05 05:06:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:06:18,869 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 [2021-06-05 05:06:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:18,870 INFO L225 Difference]: With dead ends: 466 [2021-06-05 05:06:18,870 INFO L226 Difference]: Without dead ends: 445 [2021-06-05 05:06:18,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 534.5ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:06:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2021-06-05 05:06:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 326. [2021-06-05 05:06:18,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 2.5507692307692307) internal successors, (829), 325 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:18,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 829 transitions. [2021-06-05 05:06:18,873 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 829 transitions. Word has length 19 [2021-06-05 05:06:18,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:18,873 INFO L482 AbstractCegarLoop]: Abstraction has 326 states and 829 transitions. [2021-06-05 05:06:18,874 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) [2021-06-05 05:06:18,874 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 829 transitions. [2021-06-05 05:06:18,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:18,874 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:18,874 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:19,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15541,552 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:19,074 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:19,074 INFO L82 PathProgramCache]: Analyzing trace with hash 116475941, now seen corresponding path program 549 times [2021-06-05 05:06:19,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:19,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515275474] [2021-06-05 05:06:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:19,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:19,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515275474] [2021-06-05 05:06:19,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515275474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:19,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940578757] [2021-06-05 05:06:19,158 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 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 [2021-06-05 05:06:19,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:06:19,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:19,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:19,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,318 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 15 treesize of output 11 [2021-06-05 05:06:19,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:19,321 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 16 treesize of output 12 [2021-06-05 05:06:19,321 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,342 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:19,342 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:19,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:19,343 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:19,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940578757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:19,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:19,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:19,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396876439] [2021-06-05 05:06:19,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:19,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:19,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:19,369 INFO L87 Difference]: Start difference. First operand 326 states and 829 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) [2021-06-05 05:06:19,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:19,814 INFO L93 Difference]: Finished difference Result 503 states and 1147 transitions. [2021-06-05 05:06:19,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:19,814 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 19 [2021-06-05 05:06:19,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:19,814 INFO L225 Difference]: With dead ends: 503 [2021-06-05 05:06:19,814 INFO L226 Difference]: Without dead ends: 494 [2021-06-05 05:06:19,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 431.1ms TimeCoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:06:19,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-06-05 05:06:19,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 313. [2021-06-05 05:06:19,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.5608974358974357) internal successors, (799), 312 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 799 transitions. [2021-06-05 05:06:19,818 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 799 transitions. Word has length 19 [2021-06-05 05:06:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:19,818 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 799 transitions. [2021-06-05 05:06:19,818 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) [2021-06-05 05:06:19,818 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 799 transitions. [2021-06-05 05:06:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:19,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:19,818 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:20,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15554,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:20,019 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:20,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:20,019 INFO L82 PathProgramCache]: Analyzing trace with hash -278346262, now seen corresponding path program 550 times [2021-06-05 05:06:20,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:20,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294199044] [2021-06-05 05:06:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:20,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294199044] [2021-06-05 05:06:20,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294199044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:20,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704868103] [2021-06-05 05:06:20,101 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 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 [2021-06-05 05:06:20,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:20,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:20,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:20,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:20,301 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 [2021-06-05 05:06:20,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:20,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:20,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:20,305 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 16 treesize of output 12 [2021-06-05 05:06:20,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:20,307 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 [2021-06-05 05:06:20,308 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:20,341 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:20,341 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:20,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:20,342 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:20,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704868103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:20,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:20,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:20,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725451651] [2021-06-05 05:06:20,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:20,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:20,370 INFO L87 Difference]: Start difference. First operand 313 states and 799 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) [2021-06-05 05:06:21,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:21,014 INFO L93 Difference]: Finished difference Result 427 states and 971 transitions. [2021-06-05 05:06:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:06:21,014 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 [2021-06-05 05:06:21,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:21,015 INFO L225 Difference]: With dead ends: 427 [2021-06-05 05:06:21,015 INFO L226 Difference]: Without dead ends: 409 [2021-06-05 05:06:21,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 562.4ms TimeCoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:06:21,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-06-05 05:06:21,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 313. [2021-06-05 05:06:21,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.548076923076923) internal successors, (795), 312 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:21,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 795 transitions. [2021-06-05 05:06:21,018 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 795 transitions. Word has length 19 [2021-06-05 05:06:21,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:21,018 INFO L482 AbstractCegarLoop]: Abstraction has 313 states and 795 transitions. [2021-06-05 05:06:21,018 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) [2021-06-05 05:06:21,018 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 795 transitions. [2021-06-05 05:06:21,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:21,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:21,019 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:21,219 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 554 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15558 [2021-06-05 05:06:21,219 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash 463775115, now seen corresponding path program 551 times [2021-06-05 05:06:21,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:21,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705227588] [2021-06-05 05:06:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:21,302 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:21,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705227588] [2021-06-05 05:06:21,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705227588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:21,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334001439] [2021-06-05 05:06:21,303 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 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 [2021-06-05 05:06:21,329 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:06:21,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:21,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:21,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:21,461 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:21,461 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 16 treesize of output 12 [2021-06-05 05:06:21,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:21,464 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 15 treesize of output 11 [2021-06-05 05:06:21,465 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,485 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:21,485 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:21,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:21,485 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:21,506 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:21,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334001439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:21,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:21,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:21,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626400135] [2021-06-05 05:06:21,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:21,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:21,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:21,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:21,507 INFO L87 Difference]: Start difference. First operand 313 states and 795 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) [2021-06-05 05:06:22,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:22,435 INFO L93 Difference]: Finished difference Result 503 states and 1129 transitions. [2021-06-05 05:06:22,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:22,435 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 19 [2021-06-05 05:06:22,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:22,436 INFO L225 Difference]: With dead ends: 503 [2021-06-05 05:06:22,436 INFO L226 Difference]: Without dead ends: 479 [2021-06-05 05:06:22,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 813.5ms TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:06:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-06-05 05:06:22,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 291. [2021-06-05 05:06:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 2.513793103448276) internal successors, (729), 290 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:22,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 729 transitions. [2021-06-05 05:06:22,439 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 729 transitions. Word has length 19 [2021-06-05 05:06:22,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:22,439 INFO L482 AbstractCegarLoop]: Abstraction has 291 states and 729 transitions. [2021-06-05 05:06:22,439 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) [2021-06-05 05:06:22,439 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 729 transitions. [2021-06-05 05:06:22,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:22,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:22,439 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:22,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15571,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:22,640 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:22,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:22,640 INFO L82 PathProgramCache]: Analyzing trace with hash -518792410, now seen corresponding path program 552 times [2021-06-05 05:06:22,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:22,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948137170] [2021-06-05 05:06:22,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:22,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:22,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:22,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948137170] [2021-06-05 05:06:22,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948137170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:22,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604969148] [2021-06-05 05:06:22,720 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 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 [2021-06-05 05:06:22,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:06:22,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:22,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:22,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:22,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:22,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:22,907 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 16 treesize of output 12 [2021-06-05 05:06:22,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:22,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:22,910 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 15 treesize of output 11 [2021-06-05 05:06:22,911 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:22,938 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:22,938 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:22,939 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:22,939 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:22,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:22,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604969148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:22,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:22,991 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:22,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388645780] [2021-06-05 05:06:22,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:22,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:22,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:22,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:22,991 INFO L87 Difference]: Start difference. First operand 291 states and 729 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) [2021-06-05 05:06:23,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:23,886 INFO L93 Difference]: Finished difference Result 472 states and 1016 transitions. [2021-06-05 05:06:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:06:23,886 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 [2021-06-05 05:06:23,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:23,886 INFO L225 Difference]: With dead ends: 472 [2021-06-05 05:06:23,886 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 05:06:23,887 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 840.9ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:06:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 05:06:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 296. [2021-06-05 05:06:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.528813559322034) internal successors, (746), 295 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 746 transitions. [2021-06-05 05:06:23,890 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 746 transitions. Word has length 19 [2021-06-05 05:06:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:23,890 INFO L482 AbstractCegarLoop]: Abstraction has 296 states and 746 transitions. [2021-06-05 05:06:23,890 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) [2021-06-05 05:06:23,890 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 746 transitions. [2021-06-05 05:06:23,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:23,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:23,890 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:24,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15575,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:24,090 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash -771947675, now seen corresponding path program 553 times [2021-06-05 05:06:24,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:24,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459099075] [2021-06-05 05:06:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:24,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:24,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:24,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459099075] [2021-06-05 05:06:24,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459099075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:24,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109446804] [2021-06-05 05:06:24,171 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 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 [2021-06-05 05:06:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:24,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:24,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:24,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:24,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:24,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:24,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:24,322 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 [2021-06-05 05:06:24,323 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:24,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:24,325 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:24,325 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 [2021-06-05 05:06:24,326 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:24,328 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:24,328 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:24,360 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:06:24,360 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:24,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:24,361 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:06:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:24,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109446804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:24,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:24,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:24,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235958817] [2021-06-05 05:06:24,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:24,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:24,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:24,405 INFO L87 Difference]: Start difference. First operand 296 states and 746 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) [2021-06-05 05:06:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:25,241 INFO L93 Difference]: Finished difference Result 466 states and 1010 transitions. [2021-06-05 05:06:25,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:25,241 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 19 [2021-06-05 05:06:25,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:25,242 INFO L225 Difference]: With dead ends: 466 [2021-06-05 05:06:25,242 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 05:06:25,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 763.5ms TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:06:25,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 05:06:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 287. [2021-06-05 05:06:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 2.4965034965034967) internal successors, (714), 286 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) [2021-06-05 05:06:25,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 714 transitions. [2021-06-05 05:06:25,245 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 714 transitions. Word has length 19 [2021-06-05 05:06:25,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:25,245 INFO L482 AbstractCegarLoop]: Abstraction has 287 states and 714 transitions. [2021-06-05 05:06:25,245 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) [2021-06-05 05:06:25,245 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 714 transitions. [2021-06-05 05:06:25,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:25,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:25,245 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:25,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15593,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:25,446 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:25,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1219285398, now seen corresponding path program 554 times [2021-06-05 05:06:25,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:25,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025839609] [2021-06-05 05:06:25,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:25,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:25,526 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:25,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:25,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025839609] [2021-06-05 05:06:25,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025839609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:25,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515644689] [2021-06-05 05:06:25,527 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 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 [2021-06-05 05:06:25,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:25,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:25,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:25,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:25,713 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:25,713 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 16 treesize of output 12 [2021-06-05 05:06:25,714 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:25,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:25,716 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 15 treesize of output 11 [2021-06-05 05:06:25,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:25,745 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:25,745 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:25,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:25,746 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:25,789 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:25,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515644689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:25,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:25,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:25,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855893541] [2021-06-05 05:06:25,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:25,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:25,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:25,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:25,790 INFO L87 Difference]: Start difference. First operand 287 states and 714 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) [2021-06-05 05:06:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:26,246 INFO L93 Difference]: Finished difference Result 388 states and 871 transitions. [2021-06-05 05:06:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:26,246 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 [2021-06-05 05:06:26,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:26,247 INFO L225 Difference]: With dead ends: 388 [2021-06-05 05:06:26,247 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 05:06:26,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:06:26,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 05:06:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 283. [2021-06-05 05:06:26,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.475177304964539) internal successors, (698), 282 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) [2021-06-05 05:06:26,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 698 transitions. [2021-06-05 05:06:26,249 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 698 transitions. Word has length 19 [2021-06-05 05:06:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:26,250 INFO L482 AbstractCegarLoop]: Abstraction has 283 states and 698 transitions. [2021-06-05 05:06:26,250 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) [2021-06-05 05:06:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 698 transitions. [2021-06-05 05:06:26,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:26,250 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:26,250 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:26,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 558 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15603 [2021-06-05 05:06:26,450 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:26,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash 1092884653, now seen corresponding path program 555 times [2021-06-05 05:06:26,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:26,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158040832] [2021-06-05 05:06:26,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:26,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:26,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:26,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158040832] [2021-06-05 05:06:26,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158040832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:26,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895666598] [2021-06-05 05:06:26,534 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 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 [2021-06-05 05:06:26,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:06:26,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:26,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:26,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:26,695 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 7 treesize of output 5 [2021-06-05 05:06:26,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:26,698 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 [2021-06-05 05:06:26,699 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:26,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:26,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:26,701 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 16 treesize of output 12 [2021-06-05 05:06:26,702 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:26,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:26,704 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 15 treesize of output 11 [2021-06-05 05:06:26,705 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:26,739 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:06:26,740 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:26,740 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:26,740 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:06:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:26,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895666598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:26,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:26,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:06:26,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268800933] [2021-06-05 05:06:26,808 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:06:26,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:06:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:26,809 INFO L87 Difference]: Start difference. First operand 283 states and 698 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) [2021-06-05 05:06:27,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:27,778 INFO L93 Difference]: Finished difference Result 356 states and 818 transitions. [2021-06-05 05:06:27,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:06:27,779 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 [2021-06-05 05:06:27,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:27,779 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:06:27,779 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 05:06:27,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 944.0ms TimeCoverageRelationStatistics Valid=215, Invalid=1425, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:06:27,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 05:06:27,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 270. [2021-06-05 05:06:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.475836431226766) internal successors, (666), 269 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 666 transitions. [2021-06-05 05:06:27,782 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 666 transitions. Word has length 19 [2021-06-05 05:06:27,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:27,782 INFO L482 AbstractCegarLoop]: Abstraction has 270 states and 666 transitions. [2021-06-05 05:06:27,782 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) [2021-06-05 05:06:27,782 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 666 transitions. [2021-06-05 05:06:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:27,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:27,782 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:27,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15619 [2021-06-05 05:06:27,983 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:27,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:27,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1003239920, now seen corresponding path program 556 times [2021-06-05 05:06:27,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:27,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045943397] [2021-06-05 05:06:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:27,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:28,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:28,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:28,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045943397] [2021-06-05 05:06:28,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045943397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:28,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923035377] [2021-06-05 05:06:28,040 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 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 [2021-06-05 05:06:28,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:28,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:28,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:28,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:28,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:28,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:28,192 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 15 treesize of output 11 [2021-06-05 05:06:28,193 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:28,217 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:06:28,218 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:28,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:28,218 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:06:28,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:28,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923035377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:28,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:28,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:28,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254902664] [2021-06-05 05:06:28,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:28,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:28,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:28,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:28,268 INFO L87 Difference]: Start difference. First operand 270 states and 666 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) [2021-06-05 05:06:28,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:28,634 INFO L93 Difference]: Finished difference Result 384 states and 882 transitions. [2021-06-05 05:06:28,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:28,634 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 [2021-06-05 05:06:28,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:28,635 INFO L225 Difference]: With dead ends: 384 [2021-06-05 05:06:28,635 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 05:06:28,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:06:28,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 05:06:28,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 280. [2021-06-05 05:06:28,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 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) [2021-06-05 05:06:28,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-06-05 05:06:28,637 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-06-05 05:06:28,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:28,638 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-06-05 05:06:28,638 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) [2021-06-05 05:06:28,638 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-06-05 05:06:28,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:28,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:28,638 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:28,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15632 [2021-06-05 05:06:28,838 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:28,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1256395185, now seen corresponding path program 557 times [2021-06-05 05:06:28,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:28,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24588948] [2021-06-05 05:06:28,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:28,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:28,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:28,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24588948] [2021-06-05 05:06:28,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24588948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:28,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970293912] [2021-06-05 05:06:28,896 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 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 [2021-06-05 05:06:28,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:06:28,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:28,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:28,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:29,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:29,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:29,081 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 15 treesize of output 11 [2021-06-05 05:06:29,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:29,084 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:29,084 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:29,119 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:06:29,119 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:29,121 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 8 treesize of output 6 [2021-06-05 05:06:29,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:29,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:29,136 INFO L518 ElimStorePlain]: Eliminatee v_prenex_586 vanished before elimination [2021-06-05 05:06:29,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:29,137 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:06:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:29,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970293912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:29,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:29,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:29,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807955799] [2021-06-05 05:06:29,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:29,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:29,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:29,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:29,189 INFO L87 Difference]: Start difference. First operand 280 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:29,398 INFO L93 Difference]: Finished difference Result 368 states and 852 transitions. [2021-06-05 05:06:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:29,398 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:06:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:29,398 INFO L225 Difference]: With dead ends: 368 [2021-06-05 05:06:29,399 INFO L226 Difference]: Without dead ends: 368 [2021-06-05 05:06:29,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-06-05 05:06:29,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 280. [2021-06-05 05:06:29,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.5089605734767026) internal successors, (700), 279 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) [2021-06-05 05:06:29,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 700 transitions. [2021-06-05 05:06:29,401 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 700 transitions. Word has length 19 [2021-06-05 05:06:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:29,401 INFO L482 AbstractCegarLoop]: Abstraction has 280 states and 700 transitions. [2021-06-05 05:06:29,401 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 700 transitions. [2021-06-05 05:06:29,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:29,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:29,402 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:29,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15642,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:29,602 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:29,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:29,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1703732908, now seen corresponding path program 558 times [2021-06-05 05:06:29,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:29,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624802575] [2021-06-05 05:06:29,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:29,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:29,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624802575] [2021-06-05 05:06:29,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624802575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:29,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586360599] [2021-06-05 05:06:29,661 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 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 [2021-06-05 05:06:29,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:29,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:29,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:29,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:29,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:29,812 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 15 treesize of output 11 [2021-06-05 05:06:29,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:29,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:29,815 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 16 treesize of output 12 [2021-06-05 05:06:29,816 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:29,840 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:06:29,841 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:29,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:29,841 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:06:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:29,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586360599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:29,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:29,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:29,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505024201] [2021-06-05 05:06:29,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:29,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:29,883 INFO L87 Difference]: Start difference. First operand 280 states and 700 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) [2021-06-05 05:06:30,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:30,135 INFO L93 Difference]: Finished difference Result 394 states and 901 transitions. [2021-06-05 05:06:30,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:30,136 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 [2021-06-05 05:06:30,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:30,136 INFO L225 Difference]: With dead ends: 394 [2021-06-05 05:06:30,136 INFO L226 Difference]: Without dead ends: 394 [2021-06-05 05:06:30,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 228.4ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:30,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-06-05 05:06:30,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 278. [2021-06-05 05:06:30,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4981949458483754) internal successors, (692), 277 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) [2021-06-05 05:06:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 692 transitions. [2021-06-05 05:06:30,139 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 692 transitions. Word has length 19 [2021-06-05 05:06:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:30,139 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 692 transitions. [2021-06-05 05:06:30,139 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) [2021-06-05 05:06:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 692 transitions. [2021-06-05 05:06:30,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:30,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:30,140 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:30,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15659 [2021-06-05 05:06:30,340 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:30,340 INFO L82 PathProgramCache]: Analyzing trace with hash 608437143, now seen corresponding path program 559 times [2021-06-05 05:06:30,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:30,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581030968] [2021-06-05 05:06:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:30,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:30,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581030968] [2021-06-05 05:06:30,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581030968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:30,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243878495] [2021-06-05 05:06:30,397 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 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 [2021-06-05 05:06:30,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:30,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:30,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:30,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:30,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:30,567 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 15 treesize of output 11 [2021-06-05 05:06:30,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:30,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:30,571 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:30,607 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:06:30,607 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:30,609 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 [2021-06-05 05:06:30,610 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:30,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:30,623 INFO L518 ElimStorePlain]: Eliminatee v_prenex_589 vanished before elimination [2021-06-05 05:06:30,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:30,624 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:06:30,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:30,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243878495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:30,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:30,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:30,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985166975] [2021-06-05 05:06:30,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:30,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:30,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:30,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:30,697 INFO L87 Difference]: Start difference. First operand 278 states and 692 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) [2021-06-05 05:06:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:31,123 INFO L93 Difference]: Finished difference Result 358 states and 822 transitions. [2021-06-05 05:06:31,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:31,124 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 [2021-06-05 05:06:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:31,124 INFO L225 Difference]: With dead ends: 358 [2021-06-05 05:06:31,124 INFO L226 Difference]: Without dead ends: 354 [2021-06-05 05:06:31,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 355.7ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:06:31,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-06-05 05:06:31,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 276. [2021-06-05 05:06:31,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.4945454545454546) internal successors, (686), 275 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 686 transitions. [2021-06-05 05:06:31,127 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 686 transitions. Word has length 19 [2021-06-05 05:06:31,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:31,127 INFO L482 AbstractCegarLoop]: Abstraction has 276 states and 686 transitions. [2021-06-05 05:06:31,127 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) [2021-06-05 05:06:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 686 transitions. [2021-06-05 05:06:31,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:31,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:31,127 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:31,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15667 [2021-06-05 05:06:31,328 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:31,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:31,328 INFO L82 PathProgramCache]: Analyzing trace with hash 2056004586, now seen corresponding path program 560 times [2021-06-05 05:06:31,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:31,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523374734] [2021-06-05 05:06:31,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:31,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:31,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523374734] [2021-06-05 05:06:31,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523374734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:31,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538047136] [2021-06-05 05:06:31,389 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 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 [2021-06-05 05:06:31,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:31,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:31,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:31,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:31,547 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:31,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:31,555 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 15 treesize of output 11 [2021-06-05 05:06:31,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:31,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:31,558 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 16 treesize of output 12 [2021-06-05 05:06:31,559 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:31,580 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:06:31,580 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:31,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:31,581 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:06:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:31,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538047136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:31,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:31,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:31,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073111813] [2021-06-05 05:06:31,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:31,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:31,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:31,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:31,603 INFO L87 Difference]: Start difference. First operand 276 states and 686 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) [2021-06-05 05:06:31,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:31,837 INFO L93 Difference]: Finished difference Result 344 states and 809 transitions. [2021-06-05 05:06:31,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:31,837 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 [2021-06-05 05:06:31,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:31,838 INFO L225 Difference]: With dead ends: 344 [2021-06-05 05:06:31,838 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 05:06:31,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 196.7ms TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:06:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 05:06:31,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 272. [2021-06-05 05:06:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 2.4797047970479706) internal successors, (672), 271 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 672 transitions. [2021-06-05 05:06:31,841 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 672 transitions. Word has length 19 [2021-06-05 05:06:31,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:31,841 INFO L482 AbstractCegarLoop]: Abstraction has 272 states and 672 transitions. [2021-06-05 05:06:31,841 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) [2021-06-05 05:06:31,841 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 672 transitions. [2021-06-05 05:06:31,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:31,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:31,841 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:32,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15681 [2021-06-05 05:06:32,057 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:32,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:32,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1684148299, now seen corresponding path program 561 times [2021-06-05 05:06:32,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:32,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815932568] [2021-06-05 05:06:32,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:32,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:32,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815932568] [2021-06-05 05:06:32,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815932568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:32,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384519385] [2021-06-05 05:06:32,117 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 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 [2021-06-05 05:06:32,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:06:32,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:32,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:32,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:32,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:32,367 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 15 treesize of output 11 [2021-06-05 05:06:32,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:32,370 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:32,371 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:32,405 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:06:32,405 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:32,407 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 [2021-06-05 05:06:32,408 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:32,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:32,420 INFO L518 ElimStorePlain]: Eliminatee v_prenex_593 vanished before elimination [2021-06-05 05:06:32,421 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:32,421 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:06:32,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:32,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384519385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:32,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:32,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:32,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563888502] [2021-06-05 05:06:32,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:32,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:32,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:32,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:32,448 INFO L87 Difference]: Start difference. First operand 272 states and 672 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) [2021-06-05 05:06:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:32,674 INFO L93 Difference]: Finished difference Result 303 states and 718 transitions. [2021-06-05 05:06:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:32,674 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 [2021-06-05 05:06:32,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:32,674 INFO L225 Difference]: With dead ends: 303 [2021-06-05 05:06:32,674 INFO L226 Difference]: Without dead ends: 295 [2021-06-05 05:06:32,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 279.6ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-06-05 05:06:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 261. [2021-06-05 05:06:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.4884615384615385) internal successors, (647), 260 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 647 transitions. [2021-06-05 05:06:32,677 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 647 transitions. Word has length 19 [2021-06-05 05:06:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:32,677 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 647 transitions. [2021-06-05 05:06:32,677 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) [2021-06-05 05:06:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 647 transitions. [2021-06-05 05:06:32,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:32,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:32,677 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:32,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15685,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:32,878 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:32,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:32,878 INFO L82 PathProgramCache]: Analyzing trace with hash -228778518, now seen corresponding path program 562 times [2021-06-05 05:06:32,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:32,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210365646] [2021-06-05 05:06:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:32,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:32,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:32,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:32,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210365646] [2021-06-05 05:06:32,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210365646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:32,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268112643] [2021-06-05 05:06:32,936 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 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 [2021-06-05 05:06:32,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:32,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:32,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:32,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:33,111 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 [2021-06-05 05:06:33,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:33,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:33,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:33,115 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 16 treesize of output 12 [2021-06-05 05:06:33,115 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:33,117 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 7 treesize of output 5 [2021-06-05 05:06:33,118 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:33,152 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:33,152 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:33,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:33,153 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:33,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:33,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268112643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:33,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:33,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:33,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183659601] [2021-06-05 05:06:33,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:33,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:33,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:33,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:33,179 INFO L87 Difference]: Start difference. First operand 261 states and 647 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) [2021-06-05 05:06:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:33,591 INFO L93 Difference]: Finished difference Result 322 states and 746 transitions. [2021-06-05 05:06:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:06:33,592 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 [2021-06-05 05:06:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:33,592 INFO L225 Difference]: With dead ends: 322 [2021-06-05 05:06:33,592 INFO L226 Difference]: Without dead ends: 310 [2021-06-05 05:06:33,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:06:33,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2021-06-05 05:06:33,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 259. [2021-06-05 05:06:33,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4806201550387597) internal successors, (640), 258 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) [2021-06-05 05:06:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 640 transitions. [2021-06-05 05:06:33,595 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 640 transitions. Word has length 19 [2021-06-05 05:06:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:33,595 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 640 transitions. [2021-06-05 05:06:33,595 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) [2021-06-05 05:06:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 640 transitions. [2021-06-05 05:06:33,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:33,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:33,595 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:33,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15712 [2021-06-05 05:06:33,802 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash 513342859, now seen corresponding path program 563 times [2021-06-05 05:06:33,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:33,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663096037] [2021-06-05 05:06:33,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:33,864 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:33,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:33,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663096037] [2021-06-05 05:06:33,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663096037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:33,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030119080] [2021-06-05 05:06:33,864 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 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 [2021-06-05 05:06:33,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:33,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:33,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:33,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:34,008 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:34,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:34,009 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 15 treesize of output 11 [2021-06-05 05:06:34,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:34,013 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 16 treesize of output 12 [2021-06-05 05:06:34,013 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,034 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:34,034 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:34,035 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,035 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:34,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030119080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:34,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:34,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:34,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757458727] [2021-06-05 05:06:34,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:34,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:34,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:34,055 INFO L87 Difference]: Start difference. First operand 259 states and 640 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:34,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:34,376 INFO L93 Difference]: Finished difference Result 400 states and 907 transitions. [2021-06-05 05:06:34,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:06:34,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:06:34,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:34,377 INFO L225 Difference]: With dead ends: 400 [2021-06-05 05:06:34,377 INFO L226 Difference]: Without dead ends: 400 [2021-06-05 05:06:34,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:06:34,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-06-05 05:06:34,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 263. [2021-06-05 05:06:34,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.4885496183206106) internal successors, (652), 262 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:34,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 652 transitions. [2021-06-05 05:06:34,380 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 652 transitions. Word has length 19 [2021-06-05 05:06:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:34,380 INFO L482 AbstractCegarLoop]: Abstraction has 263 states and 652 transitions. [2021-06-05 05:06:34,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 652 transitions. [2021-06-05 05:06:34,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:34,380 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:34,381 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:34,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15725,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:34,581 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:34,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:34,581 INFO L82 PathProgramCache]: Analyzing trace with hash -469224666, now seen corresponding path program 564 times [2021-06-05 05:06:34,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:34,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263950989] [2021-06-05 05:06:34,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:34,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:34,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263950989] [2021-06-05 05:06:34,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263950989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:34,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827882637] [2021-06-05 05:06:34,638 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 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 [2021-06-05 05:06:34,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:34,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:34,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:34,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:34,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:34,797 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 15 treesize of output 11 [2021-06-05 05:06:34,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,800 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:34,800 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 16 treesize of output 12 [2021-06-05 05:06:34,801 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:34,829 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:34,829 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:34,830 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:34,830 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:34,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827882637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:34,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:34,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:34,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330634383] [2021-06-05 05:06:34,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:34,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:34,878 INFO L87 Difference]: Start difference. First operand 263 states and 652 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) [2021-06-05 05:06:35,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:35,907 INFO L93 Difference]: Finished difference Result 468 states and 988 transitions. [2021-06-05 05:06:35,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:06:35,908 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 [2021-06-05 05:06:35,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:35,908 INFO L225 Difference]: With dead ends: 468 [2021-06-05 05:06:35,908 INFO L226 Difference]: Without dead ends: 462 [2021-06-05 05:06:35,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 900.5ms TimeCoverageRelationStatistics Valid=263, Invalid=1629, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:06:35,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-06-05 05:06:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 267. [2021-06-05 05:06:35,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-06-05 05:06:35,911 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-06-05 05:06:35,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:35,911 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-06-05 05:06:35,911 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) [2021-06-05 05:06:35,911 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-06-05 05:06:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:35,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:35,912 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:36,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15729 [2021-06-05 05:06:36,112 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:36,112 INFO L82 PathProgramCache]: Analyzing trace with hash -722379931, now seen corresponding path program 565 times [2021-06-05 05:06:36,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:36,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133479128] [2021-06-05 05:06:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:36,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:36,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133479128] [2021-06-05 05:06:36,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133479128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:36,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36365294] [2021-06-05 05:06:36,170 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 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 [2021-06-05 05:06:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:36,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:36,303 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 [2021-06-05 05:06:36,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:36,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:36,307 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:36,307 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 16 treesize of output 12 [2021-06-05 05:06:36,308 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:36,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:36,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:36,310 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 15 treesize of output 11 [2021-06-05 05:06:36,311 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:36,313 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 [2021-06-05 05:06:36,314 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:36,347 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:06:36,347 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:36,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:36,348 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:06:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:36,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36365294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:36,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:36,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:36,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479512989] [2021-06-05 05:06:36,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:36,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:36,390 INFO L87 Difference]: Start difference. First operand 267 states and 667 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:36,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:36,858 INFO L93 Difference]: Finished difference Result 486 states and 1050 transitions. [2021-06-05 05:06:36,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:06:36,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:06:36,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:36,859 INFO L225 Difference]: With dead ends: 486 [2021-06-05 05:06:36,859 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 05:06:36,859 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 434.1ms TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:06:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 05:06:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 267. [2021-06-05 05:06:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.507518796992481) internal successors, (667), 266 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 667 transitions. [2021-06-05 05:06:36,862 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 667 transitions. Word has length 19 [2021-06-05 05:06:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:36,862 INFO L482 AbstractCegarLoop]: Abstraction has 267 states and 667 transitions. [2021-06-05 05:06:36,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 667 transitions. [2021-06-05 05:06:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:36,863 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:36,863 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:37,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15747 [2021-06-05 05:06:37,063 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:37,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:37,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1169717654, now seen corresponding path program 566 times [2021-06-05 05:06:37,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:37,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322020276] [2021-06-05 05:06:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:37,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:37,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:37,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322020276] [2021-06-05 05:06:37,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322020276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:37,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206375430] [2021-06-05 05:06:37,125 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 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 [2021-06-05 05:06:37,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:37,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:37,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:37,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:37,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:37,315 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 16 treesize of output 12 [2021-06-05 05:06:37,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:37,318 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:37,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:37,319 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:37,348 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:37,348 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:37,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:37,349 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:37,390 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:37,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206375430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:37,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:37,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:37,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738604605] [2021-06-05 05:06:37,390 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:37,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:37,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:37,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:37,390 INFO L87 Difference]: Start difference. First operand 267 states and 667 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) [2021-06-05 05:06:37,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:37,850 INFO L93 Difference]: Finished difference Result 359 states and 829 transitions. [2021-06-05 05:06:37,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:37,850 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 [2021-06-05 05:06:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:37,851 INFO L225 Difference]: With dead ends: 359 [2021-06-05 05:06:37,851 INFO L226 Difference]: Without dead ends: 359 [2021-06-05 05:06:37,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:06:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-06-05 05:06:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 264. [2021-06-05 05:06:37,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-06-05 05:06:37,854 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-06-05 05:06:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:37,854 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-06-05 05:06:37,854 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) [2021-06-05 05:06:37,854 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-06-05 05:06:37,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:37,854 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:37,854 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:38,054 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15756 [2021-06-05 05:06:38,054 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:38,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:38,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1142452397, now seen corresponding path program 567 times [2021-06-05 05:06:38,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:38,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811314267] [2021-06-05 05:06:38,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:38,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:38,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:38,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811314267] [2021-06-05 05:06:38,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811314267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:38,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562297838] [2021-06-05 05:06:38,125 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 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 [2021-06-05 05:06:38,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:06:38,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:38,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:38,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:38,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:38,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:38,261 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 15 treesize of output 11 [2021-06-05 05:06:38,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:38,264 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:38,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:38,267 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 [2021-06-05 05:06:38,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:38,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:38,270 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 16 treesize of output 12 [2021-06-05 05:06:38,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:38,303 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:06:38,303 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:38,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:38,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:06:38,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:38,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562297838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:38,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:38,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:38,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053947137] [2021-06-05 05:06:38,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:38,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:38,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:38,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:38,366 INFO L87 Difference]: Start difference. First operand 264 states and 655 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) [2021-06-05 05:06:39,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:39,181 INFO L93 Difference]: Finished difference Result 445 states and 975 transitions. [2021-06-05 05:06:39,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:06:39,181 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 [2021-06-05 05:06:39,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:39,182 INFO L225 Difference]: With dead ends: 445 [2021-06-05 05:06:39,182 INFO L226 Difference]: Without dead ends: 441 [2021-06-05 05:06:39,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 673.1ms TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:06:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2021-06-05 05:06:39,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 262. [2021-06-05 05:06:39,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4904214559386975) internal successors, (650), 261 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:39,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 650 transitions. [2021-06-05 05:06:39,185 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 650 transitions. Word has length 19 [2021-06-05 05:06:39,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:39,185 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 650 transitions. [2021-06-05 05:06:39,185 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) [2021-06-05 05:06:39,185 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 650 transitions. [2021-06-05 05:06:39,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:39,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:39,185 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:39,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15772 [2021-06-05 05:06:39,386 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:39,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:39,386 INFO L82 PathProgramCache]: Analyzing trace with hash 118520656, now seen corresponding path program 568 times [2021-06-05 05:06:39,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:39,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363725624] [2021-06-05 05:06:39,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:39,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:39,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363725624] [2021-06-05 05:06:39,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363725624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:39,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736645482] [2021-06-05 05:06:39,443 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 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 [2021-06-05 05:06:39,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:39,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:39,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:39,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:39,591 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:39,591 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 16 treesize of output 12 [2021-06-05 05:06:39,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:39,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:39,595 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 15 treesize of output 11 [2021-06-05 05:06:39,595 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:39,620 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:06:39,620 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:39,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:39,621 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:06:39,671 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:39,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736645482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:39,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:39,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:39,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947335484] [2021-06-05 05:06:39,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:39,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:39,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:39,672 INFO L87 Difference]: Start difference. First operand 262 states and 650 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) [2021-06-05 05:06:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:40,887 INFO L93 Difference]: Finished difference Result 534 states and 1133 transitions. [2021-06-05 05:06:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:06:40,887 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 [2021-06-05 05:06:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:40,888 INFO L225 Difference]: With dead ends: 534 [2021-06-05 05:06:40,888 INFO L226 Difference]: Without dead ends: 528 [2021-06-05 05:06:40,888 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 641 ImplicationChecksByTransitivity, 1106.6ms TimeCoverageRelationStatistics Valid=359, Invalid=1993, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:06:40,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-06-05 05:06:40,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 274. [2021-06-05 05:06:40,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.5384615384615383) internal successors, (693), 273 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:40,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 693 transitions. [2021-06-05 05:06:40,891 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 693 transitions. Word has length 19 [2021-06-05 05:06:40,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:40,891 INFO L482 AbstractCegarLoop]: Abstraction has 274 states and 693 transitions. [2021-06-05 05:06:40,891 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) [2021-06-05 05:06:40,891 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 693 transitions. [2021-06-05 05:06:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:40,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:40,891 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:41,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15785,572 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:41,092 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:41,092 INFO L82 PathProgramCache]: Analyzing trace with hash -134634609, now seen corresponding path program 569 times [2021-06-05 05:06:41,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:41,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054263392] [2021-06-05 05:06:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:41,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:41,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:41,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:41,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054263392] [2021-06-05 05:06:41,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054263392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:41,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790900686] [2021-06-05 05:06:41,152 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 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 [2021-06-05 05:06:41,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:41,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:41,321 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 [2021-06-05 05:06:41,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:41,324 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:41,324 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:41,360 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:06:41,360 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:41,362 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 [2021-06-05 05:06:41,363 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:41,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:41,378 INFO L518 ElimStorePlain]: Eliminatee v_prenex_596 vanished before elimination [2021-06-05 05:06:41,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:41,379 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:06:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:41,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790900686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:41,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:41,431 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:41,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121500362] [2021-06-05 05:06:41,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:41,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:41,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:41,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:41,431 INFO L87 Difference]: Start difference. First operand 274 states and 693 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:41,876 INFO L93 Difference]: Finished difference Result 390 states and 875 transitions. [2021-06-05 05:06:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:06:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:41,877 INFO L225 Difference]: With dead ends: 390 [2021-06-05 05:06:41,877 INFO L226 Difference]: Without dead ends: 384 [2021-06-05 05:06:41,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 417.5ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:06:41,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-06-05 05:06:41,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 269. [2021-06-05 05:06:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.5261194029850746) internal successors, (677), 268 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:41,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 677 transitions. [2021-06-05 05:06:41,880 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 677 transitions. Word has length 19 [2021-06-05 05:06:41,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:41,880 INFO L482 AbstractCegarLoop]: Abstraction has 269 states and 677 transitions. [2021-06-05 05:06:41,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:06:41,880 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 677 transitions. [2021-06-05 05:06:41,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:41,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:41,880 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:42,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15795,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:42,081 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:42,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:42,081 INFO L82 PathProgramCache]: Analyzing trace with hash -581972332, now seen corresponding path program 570 times [2021-06-05 05:06:42,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:42,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264411757] [2021-06-05 05:06:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:42,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:42,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:42,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:42,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264411757] [2021-06-05 05:06:42,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264411757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:42,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403777031] [2021-06-05 05:06:42,138 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 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 [2021-06-05 05:06:42,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:42,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:42,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:42,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:42,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:42,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:42,284 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 15 treesize of output 11 [2021-06-05 05:06:42,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:42,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:42,287 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 16 treesize of output 12 [2021-06-05 05:06:42,288 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:42,313 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:06:42,313 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:42,314 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:42,314 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:06:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:42,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403777031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:42,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:42,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:42,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159125457] [2021-06-05 05:06:42,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:42,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:42,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:42,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:42,359 INFO L87 Difference]: Start difference. First operand 269 states and 677 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) [2021-06-05 05:06:42,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:42,929 INFO L93 Difference]: Finished difference Result 435 states and 976 transitions. [2021-06-05 05:06:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:06:42,930 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 [2021-06-05 05:06:42,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:42,930 INFO L225 Difference]: With dead ends: 435 [2021-06-05 05:06:42,930 INFO L226 Difference]: Without dead ends: 435 [2021-06-05 05:06:42,930 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:06:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-06-05 05:06:42,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 261. [2021-06-05 05:06:42,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.480769230769231) internal successors, (645), 260 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:42,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 645 transitions. [2021-06-05 05:06:42,933 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 645 transitions. Word has length 19 [2021-06-05 05:06:42,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:42,933 INFO L482 AbstractCegarLoop]: Abstraction has 261 states and 645 transitions. [2021-06-05 05:06:42,933 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) [2021-06-05 05:06:42,933 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 645 transitions. [2021-06-05 05:06:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:42,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:42,933 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:43,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15806 [2021-06-05 05:06:43,134 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:43,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:43,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1730197719, now seen corresponding path program 571 times [2021-06-05 05:06:43,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:43,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579884270] [2021-06-05 05:06:43,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:43,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:43,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579884270] [2021-06-05 05:06:43,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579884270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:43,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834726726] [2021-06-05 05:06:43,190 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 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 [2021-06-05 05:06:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:43,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:43,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:43,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:43,355 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:43,355 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 16 treesize of output 12 [2021-06-05 05:06:43,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:43,364 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 [2021-06-05 05:06:43,366 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:43,409 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:06:43,409 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:43,411 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 [2021-06-05 05:06:43,412 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:43,426 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:43,426 INFO L518 ElimStorePlain]: Eliminatee v_prenex_599 vanished before elimination [2021-06-05 05:06:43,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:43,433 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:06:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:43,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834726726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:43,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:43,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:43,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542107573] [2021-06-05 05:06:43,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:43,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:43,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:43,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:43,512 INFO L87 Difference]: Start difference. First operand 261 states and 645 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) [2021-06-05 05:06:44,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:44,206 INFO L93 Difference]: Finished difference Result 348 states and 783 transitions. [2021-06-05 05:06:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:06:44,206 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 [2021-06-05 05:06:44,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:44,206 INFO L225 Difference]: With dead ends: 348 [2021-06-05 05:06:44,206 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 05:06:44,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 638.8ms TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:06:44,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 05:06:44,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 259. [2021-06-05 05:06:44,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.4767441860465116) internal successors, (639), 258 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) [2021-06-05 05:06:44,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 639 transitions. [2021-06-05 05:06:44,209 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 639 transitions. Word has length 19 [2021-06-05 05:06:44,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:44,209 INFO L482 AbstractCegarLoop]: Abstraction has 259 states and 639 transitions. [2021-06-05 05:06:44,209 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) [2021-06-05 05:06:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 639 transitions. [2021-06-05 05:06:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:44,209 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:44,209 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:44,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15814,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:44,410 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:44,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:44,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1117202134, now seen corresponding path program 572 times [2021-06-05 05:06:44,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:44,410 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741794825] [2021-06-05 05:06:44,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:44,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:44,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741794825] [2021-06-05 05:06:44,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741794825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:44,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225376272] [2021-06-05 05:06:44,469 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 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 [2021-06-05 05:06:44,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:44,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:44,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:44,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:44,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:44,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:44,624 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 15 treesize of output 11 [2021-06-05 05:06:44,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:44,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:44,627 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 16 treesize of output 12 [2021-06-05 05:06:44,628 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:44,648 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:06:44,648 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:44,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:44,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:06:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:44,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225376272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:44,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:44,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:44,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981382196] [2021-06-05 05:06:44,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:44,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:44,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:44,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:44,670 INFO L87 Difference]: Start difference. First operand 259 states and 639 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) [2021-06-05 05:06:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:44,968 INFO L93 Difference]: Finished difference Result 349 states and 805 transitions. [2021-06-05 05:06:44,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:06:44,968 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 [2021-06-05 05:06:44,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:44,969 INFO L225 Difference]: With dead ends: 349 [2021-06-05 05:06:44,969 INFO L226 Difference]: Without dead ends: 349 [2021-06-05 05:06:44,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:06:44,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-06-05 05:06:44,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 251. [2021-06-05 05:06:44,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 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) [2021-06-05 05:06:44,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-06-05 05:06:44,971 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-06-05 05:06:44,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:44,971 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-06-05 05:06:44,971 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) [2021-06-05 05:06:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-06-05 05:06:44,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:44,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:44,972 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:45,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15828 [2021-06-05 05:06:45,172 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:45,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:45,172 INFO L82 PathProgramCache]: Analyzing trace with hash -1489058421, now seen corresponding path program 573 times [2021-06-05 05:06:45,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:45,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268317405] [2021-06-05 05:06:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:06:45,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268317405] [2021-06-05 05:06:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268317405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:45,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085142263] [2021-06-05 05:06:45,234 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 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 [2021-06-05 05:06:45,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:06:45,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:45,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:45,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:45,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:45,516 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 15 treesize of output 11 [2021-06-05 05:06:45,517 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,552 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:06:45,554 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 [2021-06-05 05:06:45,555 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:45,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:45,567 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:45,568 INFO L518 ElimStorePlain]: Eliminatee v_prenex_606 vanished before elimination [2021-06-05 05:06:45,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:45,568 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:06:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085142263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:45,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:06:45,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625661879] [2021-06-05 05:06:45,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:06:45,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:06:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:06:45,595 INFO L87 Difference]: Start difference. First operand 251 states and 611 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) [2021-06-05 05:06:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:45,908 INFO L93 Difference]: Finished difference Result 270 states and 642 transitions. [2021-06-05 05:06:45,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:45,908 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 [2021-06-05 05:06:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:45,909 INFO L225 Difference]: With dead ends: 270 [2021-06-05 05:06:45,909 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 05:06:45,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 399.5ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:06:45,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 05:06:45,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 248. [2021-06-05 05:06:45,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4412955465587043) internal successors, (603), 247 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) [2021-06-05 05:06:45,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 603 transitions. [2021-06-05 05:06:45,911 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 603 transitions. Word has length 19 [2021-06-05 05:06:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:45,911 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 603 transitions. [2021-06-05 05:06:45,911 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) [2021-06-05 05:06:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 603 transitions. [2021-06-05 05:06:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:45,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:45,912 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:46,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15832 [2021-06-05 05:06:46,112 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:46,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1158756454, now seen corresponding path program 574 times [2021-06-05 05:06:46,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:46,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12728302] [2021-06-05 05:06:46,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:46,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:46,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12728302] [2021-06-05 05:06:46,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12728302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:46,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064522418] [2021-06-05 05:06:46,179 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 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 [2021-06-05 05:06:46,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:46,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:46,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:46,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:46,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:46,351 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:46,351 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 15 treesize of output 11 [2021-06-05 05:06:46,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:46,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:46,354 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 16 treesize of output 12 [2021-06-05 05:06:46,355 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:46,379 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:06:46,379 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:46,380 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:46,380 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:06:46,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:46,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064522418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:46,431 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:46,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:46,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216414746] [2021-06-05 05:06:46,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:46,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:46,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:46,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:46,432 INFO L87 Difference]: Start difference. First operand 248 states and 603 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) [2021-06-05 05:06:47,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:47,182 INFO L93 Difference]: Finished difference Result 376 states and 862 transitions. [2021-06-05 05:06:47,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:06:47,182 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 [2021-06-05 05:06:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:47,183 INFO L225 Difference]: With dead ends: 376 [2021-06-05 05:06:47,183 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 05:06:47,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 731.7ms TimeCoverageRelationStatistics Valid=163, Invalid=1097, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:06:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 05:06:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 266. [2021-06-05 05:06:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:47,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-06-05 05:06:47,185 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-06-05 05:06:47,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:47,186 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-06-05 05:06:47,186 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) [2021-06-05 05:06:47,186 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-06-05 05:06:47,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:47,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:47,186 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:47,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15858 [2021-06-05 05:06:47,386 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:47,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash 905601189, now seen corresponding path program 575 times [2021-06-05 05:06:47,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:47,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973250348] [2021-06-05 05:06:47,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:47,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:47,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973250348] [2021-06-05 05:06:47,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973250348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:47,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394925405] [2021-06-05 05:06:47,464 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 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 [2021-06-05 05:06:47,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:06:47,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:47,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:47,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:47,662 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 [2021-06-05 05:06:47,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:47,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:47,666 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 15 treesize of output 11 [2021-06-05 05:06:47,667 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:47,708 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:06:47,708 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:47,710 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 [2021-06-05 05:06:47,711 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:47,725 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:47,725 INFO L518 ElimStorePlain]: Eliminatee v_prenex_609 vanished before elimination [2021-06-05 05:06:47,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:47,726 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:06:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:47,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394925405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:47,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:47,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:47,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570626469] [2021-06-05 05:06:47,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:47,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:47,779 INFO L87 Difference]: Start difference. First operand 266 states and 663 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) [2021-06-05 05:06:48,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:48,146 INFO L93 Difference]: Finished difference Result 339 states and 789 transitions. [2021-06-05 05:06:48,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:06:48,146 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 [2021-06-05 05:06:48,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:48,146 INFO L225 Difference]: With dead ends: 339 [2021-06-05 05:06:48,146 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 05:06:48,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 345.7ms TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:06:48,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 05:06:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 266. [2021-06-05 05:06:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5018867924528303) internal successors, (663), 265 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 663 transitions. [2021-06-05 05:06:48,149 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 663 transitions. Word has length 19 [2021-06-05 05:06:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:48,149 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 663 transitions. [2021-06-05 05:06:48,149 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) [2021-06-05 05:06:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 663 transitions. [2021-06-05 05:06:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:48,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:48,149 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:48,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15868,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:48,350 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:48,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:48,350 INFO L82 PathProgramCache]: Analyzing trace with hash 458263466, now seen corresponding path program 576 times [2021-06-05 05:06:48,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:48,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720143099] [2021-06-05 05:06:48,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:48,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:48,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:48,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720143099] [2021-06-05 05:06:48,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720143099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:48,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849260936] [2021-06-05 05:06:48,417 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 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 [2021-06-05 05:06:48,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:48,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:48,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:48,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:48,584 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:48,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:48,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:48,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:48,587 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 16 treesize of output 12 [2021-06-05 05:06:48,588 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:48,613 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:06:48,613 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:48,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:48,614 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:06:48,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:48,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849260936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:48,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:48,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:48,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890944401] [2021-06-05 05:06:48,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:48,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:48,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:48,656 INFO L87 Difference]: Start difference. First operand 266 states and 663 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) [2021-06-05 05:06:49,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:49,264 INFO L93 Difference]: Finished difference Result 402 states and 911 transitions. [2021-06-05 05:06:49,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:06:49,264 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 [2021-06-05 05:06:49,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:49,265 INFO L225 Difference]: With dead ends: 402 [2021-06-05 05:06:49,265 INFO L226 Difference]: Without dead ends: 402 [2021-06-05 05:06:49,265 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 554.2ms TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:06:49,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2021-06-05 05:06:49,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 264. [2021-06-05 05:06:49,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.4904942965779466) internal successors, (655), 263 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:49,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 655 transitions. [2021-06-05 05:06:49,267 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 655 transitions. Word has length 19 [2021-06-05 05:06:49,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:49,267 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 655 transitions. [2021-06-05 05:06:49,268 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) [2021-06-05 05:06:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 655 transitions. [2021-06-05 05:06:49,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:49,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:49,268 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:49,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15879 [2021-06-05 05:06:49,483 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1524533779, now seen corresponding path program 577 times [2021-06-05 05:06:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:49,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509306103] [2021-06-05 05:06:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:49,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:49,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509306103] [2021-06-05 05:06:49,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509306103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:49,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988332774] [2021-06-05 05:06:49,552 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 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 [2021-06-05 05:06:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:49,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:49,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:49,764 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:49,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:49,765 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 16 treesize of output 12 [2021-06-05 05:06:49,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:49,768 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 [2021-06-05 05:06:49,769 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:49,809 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:06:49,809 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:49,811 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 [2021-06-05 05:06:49,812 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:49,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:49,826 INFO L518 ElimStorePlain]: Eliminatee v_prenex_612 vanished before elimination [2021-06-05 05:06:49,827 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:49,827 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:06:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:49,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988332774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:49,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:49,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:49,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957022981] [2021-06-05 05:06:49,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:49,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:49,902 INFO L87 Difference]: Start difference. First operand 264 states and 655 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) [2021-06-05 05:06:50,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:50,464 INFO L93 Difference]: Finished difference Result 333 states and 770 transitions. [2021-06-05 05:06:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:06:50,464 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 [2021-06-05 05:06:50,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:50,464 INFO L225 Difference]: With dead ends: 333 [2021-06-05 05:06:50,464 INFO L226 Difference]: Without dead ends: 329 [2021-06-05 05:06:50,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 513.5ms TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:06:50,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2021-06-05 05:06:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 262. [2021-06-05 05:06:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.4865900383141764) internal successors, (649), 261 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:50,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 649 transitions. [2021-06-05 05:06:50,467 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 649 transitions. Word has length 19 [2021-06-05 05:06:50,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:50,467 INFO L482 AbstractCegarLoop]: Abstraction has 262 states and 649 transitions. [2021-06-05 05:06:50,467 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) [2021-06-05 05:06:50,467 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 649 transitions. [2021-06-05 05:06:50,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:50,467 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:50,467 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:50,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15887,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:50,685 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:50,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:50,685 INFO L82 PathProgramCache]: Analyzing trace with hash -76966336, now seen corresponding path program 578 times [2021-06-05 05:06:50,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:50,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160232029] [2021-06-05 05:06:50,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:50,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:50,754 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:50,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:50,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160232029] [2021-06-05 05:06:50,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160232029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:50,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188162738] [2021-06-05 05:06:50,754 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 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 [2021-06-05 05:06:50,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:50,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:50,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:50,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:50,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:50,929 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:50,929 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 15 treesize of output 11 [2021-06-05 05:06:50,930 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:50,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:50,932 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 16 treesize of output 12 [2021-06-05 05:06:50,933 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:50,953 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:06:50,954 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:50,954 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:50,954 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:06:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:50,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188162738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:50,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:50,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:50,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106224175] [2021-06-05 05:06:50,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:50,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:50,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:50,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:50,977 INFO L87 Difference]: Start difference. First operand 262 states and 649 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) [2021-06-05 05:06:51,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:51,380 INFO L93 Difference]: Finished difference Result 347 states and 809 transitions. [2021-06-05 05:06:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:51,381 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 [2021-06-05 05:06:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:51,381 INFO L225 Difference]: With dead ends: 347 [2021-06-05 05:06:51,381 INFO L226 Difference]: Without dead ends: 347 [2021-06-05 05:06:51,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 386.2ms TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:06:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-06-05 05:06:51,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 258. [2021-06-05 05:06:51,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.470817120622568) internal successors, (635), 257 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:51,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 635 transitions. [2021-06-05 05:06:51,384 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 635 transitions. Word has length 19 [2021-06-05 05:06:51,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:51,384 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 635 transitions. [2021-06-05 05:06:51,384 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) [2021-06-05 05:06:51,384 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 635 transitions. [2021-06-05 05:06:51,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:51,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:51,384 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:51,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15907,582 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:51,589 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:51,589 INFO L82 PathProgramCache]: Analyzing trace with hash -448822623, now seen corresponding path program 579 times [2021-06-05 05:06:51,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:51,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248754055] [2021-06-05 05:06:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:51,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:51,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248754055] [2021-06-05 05:06:51,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248754055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:51,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432975317] [2021-06-05 05:06:51,659 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 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 [2021-06-05 05:06:51,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:06:51,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:51,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:51,953 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:51,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:51,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:51,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:51,957 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,011 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:06:52,011 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:52,013 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 [2021-06-05 05:06:52,014 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:52,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_618 vanished before elimination [2021-06-05 05:06:52,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:52,027 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:06:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:52,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432975317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:52,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:52,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:52,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777002157] [2021-06-05 05:06:52,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:52,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:52,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:52,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:52,055 INFO L87 Difference]: Start difference. First operand 258 states and 635 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) [2021-06-05 05:06:52,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:52,330 INFO L93 Difference]: Finished difference Result 285 states and 679 transitions. [2021-06-05 05:06:52,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:52,331 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 [2021-06-05 05:06:52,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:52,331 INFO L225 Difference]: With dead ends: 285 [2021-06-05 05:06:52,331 INFO L226 Difference]: Without dead ends: 277 [2021-06-05 05:06:52,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 364.8ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:06:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-06-05 05:06:52,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 256. [2021-06-05 05:06:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.466666666666667) internal successors, (629), 255 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) [2021-06-05 05:06:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 629 transitions. [2021-06-05 05:06:52,333 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 629 transitions. Word has length 19 [2021-06-05 05:06:52,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:52,333 INFO L482 AbstractCegarLoop]: Abstraction has 256 states and 629 transitions. [2021-06-05 05:06:52,333 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) [2021-06-05 05:06:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 629 transitions. [2021-06-05 05:06:52,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:52,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:52,334 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:52,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15911 [2021-06-05 05:06:52,534 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:52,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:52,534 INFO L82 PathProgramCache]: Analyzing trace with hash 510778986, now seen corresponding path program 580 times [2021-06-05 05:06:52,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:52,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103906057] [2021-06-05 05:06:52,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:52,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:52,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103906057] [2021-06-05 05:06:52,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103906057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:52,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427807164] [2021-06-05 05:06:52,605 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 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 [2021-06-05 05:06:52,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:52,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:52,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:52,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,780 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 15 treesize of output 11 [2021-06-05 05:06:52,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,783 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:52,783 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 16 treesize of output 12 [2021-06-05 05:06:52,783 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,805 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:06:52,805 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:52,806 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:52,806 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:06:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:52,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427807164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:52,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:52,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:52,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050034932] [2021-06-05 05:06:52,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:52,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:52,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:52,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:52,829 INFO L87 Difference]: Start difference. First operand 256 states and 629 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) [2021-06-05 05:06:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:53,140 INFO L93 Difference]: Finished difference Result 315 states and 738 transitions. [2021-06-05 05:06:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:06:53,141 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 [2021-06-05 05:06:53,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:53,141 INFO L225 Difference]: With dead ends: 315 [2021-06-05 05:06:53,141 INFO L226 Difference]: Without dead ends: 315 [2021-06-05 05:06:53,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:06:53,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-06-05 05:06:53,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 252. [2021-06-05 05:06:53,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.450199203187251) internal successors, (615), 251 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) [2021-06-05 05:06:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 615 transitions. [2021-06-05 05:06:53,143 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 615 transitions. Word has length 19 [2021-06-05 05:06:53,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:53,143 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 615 transitions. [2021-06-05 05:06:53,143 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) [2021-06-05 05:06:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 615 transitions. [2021-06-05 05:06:53,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:53,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:53,144 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:53,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15927,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:53,344 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:53,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:53,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1461515155, now seen corresponding path program 581 times [2021-06-05 05:06:53,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:53,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009056352] [2021-06-05 05:06:53,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:53,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:53,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009056352] [2021-06-05 05:06:53,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009056352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:53,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013120834] [2021-06-05 05:06:53,420 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 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 [2021-06-05 05:06:53,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:06:53,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:53,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:53,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:53,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:06:53,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:53,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:53,730 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 15 treesize of output 11 [2021-06-05 05:06:53,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:53,765 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:06:53,767 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 7 treesize of output 5 [2021-06-05 05:06:53,768 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:53,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:06:53,781 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:53,781 INFO L518 ElimStorePlain]: Eliminatee v_prenex_623 vanished before elimination [2021-06-05 05:06:53,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:53,782 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:06:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:53,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013120834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:53,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:53,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:53,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592408553] [2021-06-05 05:06:53,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:53,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:53,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:53,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:53,810 INFO L87 Difference]: Start difference. First operand 252 states and 615 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) [2021-06-05 05:06:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:54,068 INFO L93 Difference]: Finished difference Result 274 states and 650 transitions. [2021-06-05 05:06:54,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:06:54,068 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 [2021-06-05 05:06:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:54,069 INFO L225 Difference]: With dead ends: 274 [2021-06-05 05:06:54,069 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 05:06:54,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 337.8ms TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:06:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 05:06:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 251. [2021-06-05 05:06:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.444) internal successors, (611), 250 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) [2021-06-05 05:06:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 611 transitions. [2021-06-05 05:06:54,071 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 611 transitions. Word has length 19 [2021-06-05 05:06:54,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:54,071 INFO L482 AbstractCegarLoop]: Abstraction has 251 states and 611 transitions. [2021-06-05 05:06:54,071 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) [2021-06-05 05:06:54,071 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 611 transitions. [2021-06-05 05:06:54,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:54,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:54,072 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:54,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15931 [2021-06-05 05:06:54,272 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:54,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:54,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1182927888, now seen corresponding path program 582 times [2021-06-05 05:06:54,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:54,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020425356] [2021-06-05 05:06:54,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:54,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:54,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:54,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020425356] [2021-06-05 05:06:54,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020425356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:54,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042372067] [2021-06-05 05:06:54,341 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 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 [2021-06-05 05:06:54,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:06:54,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:54,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:54,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:54,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:54,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:54,528 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 16 treesize of output 12 [2021-06-05 05:06:54,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:54,531 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 [2021-06-05 05:06:54,532 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:54,534 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 [2021-06-05 05:06:54,535 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:54,569 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:54,569 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:54,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:54,570 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:54,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042372067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:54,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:54,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:54,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720677996] [2021-06-05 05:06:54,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:54,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:54,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:54,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:54,597 INFO L87 Difference]: Start difference. First operand 251 states and 611 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) [2021-06-05 05:06:54,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:54,796 INFO L93 Difference]: Finished difference Result 285 states and 669 transitions. [2021-06-05 05:06:54,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:06:54,796 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 [2021-06-05 05:06:54,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:54,796 INFO L225 Difference]: With dead ends: 285 [2021-06-05 05:06:54,796 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 05:06:54,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 254.4ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:06:54,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 05:06:54,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 252. [2021-06-05 05:06:54,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 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) [2021-06-05 05:06:54,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 05:06:54,799 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 05:06:54,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:54,799 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 05:06:54,799 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) [2021-06-05 05:06:54,799 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 05:06:54,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:54,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:54,799 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:54,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15947,586 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:55,000 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:55,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:55,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1581113201, now seen corresponding path program 583 times [2021-06-05 05:06:55,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:55,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889443473] [2021-06-05 05:06:55,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:55,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:55,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:55,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889443473] [2021-06-05 05:06:55,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889443473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:55,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120935120] [2021-06-05 05:06:55,073 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 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 [2021-06-05 05:06:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:55,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:55,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:55,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:55,223 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 16 treesize of output 12 [2021-06-05 05:06:55,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:55,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:55,226 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 15 treesize of output 11 [2021-06-05 05:06:55,227 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:55,247 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:55,247 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:55,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:55,248 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:55,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:55,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120935120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:55,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:55,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:55,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857352039] [2021-06-05 05:06:55,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:55,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:55,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:55,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:55,268 INFO L87 Difference]: Start difference. First operand 252 states and 613 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) [2021-06-05 05:06:55,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:55,607 INFO L93 Difference]: Finished difference Result 328 states and 765 transitions. [2021-06-05 05:06:55,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:06:55,607 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 [2021-06-05 05:06:55,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:55,608 INFO L225 Difference]: With dead ends: 328 [2021-06-05 05:06:55,608 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 05:06:55,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 257.0ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:06:55,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 05:06:55,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 252. [2021-06-05 05:06:55,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 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) [2021-06-05 05:06:55,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 05:06:55,610 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 05:06:55,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:55,610 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 05:06:55,610 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) [2021-06-05 05:06:55,610 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 05:06:55,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:55,611 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:55,611 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:55,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15960,587 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:06:55,811 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:55,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:55,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1975935404, now seen corresponding path program 584 times [2021-06-05 05:06:55,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:55,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322887640] [2021-06-05 05:06:55,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:55,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:55,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322887640] [2021-06-05 05:06:55,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322887640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:55,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399646135] [2021-06-05 05:06:55,880 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 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 [2021-06-05 05:06:55,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:06:55,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:55,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:55,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:56,069 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 [2021-06-05 05:06:56,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:56,074 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 [2021-06-05 05:06:56,075 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:56,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:56,079 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 [2021-06-05 05:06:56,080 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:56,114 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:06:56,114 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:56,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:06:56,115 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:06:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:56,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399646135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:56,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:56,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:56,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161589191] [2021-06-05 05:06:56,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:56,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:56,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:56,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:56,142 INFO L87 Difference]: Start difference. First operand 252 states and 613 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) [2021-06-05 05:06:56,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:56,415 INFO L93 Difference]: Finished difference Result 284 states and 669 transitions. [2021-06-05 05:06:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:06:56,415 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 [2021-06-05 05:06:56,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:56,416 INFO L225 Difference]: With dead ends: 284 [2021-06-05 05:06:56,416 INFO L226 Difference]: Without dead ends: 272 [2021-06-05 05:06:56,416 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 344.3ms TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:06:56,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-06-05 05:06:56,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 252. [2021-06-05 05:06:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.442231075697211) internal successors, (613), 251 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) [2021-06-05 05:06:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 613 transitions. [2021-06-05 05:06:56,418 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 613 transitions. Word has length 19 [2021-06-05 05:06:56,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:56,418 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 613 transitions. [2021-06-05 05:06:56,418 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) [2021-06-05 05:06:56,418 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 613 transitions. [2021-06-05 05:06:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:56,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:56,419 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:56,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 588 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15964 [2021-06-05 05:06:56,619 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:56,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:56,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1233814027, now seen corresponding path program 585 times [2021-06-05 05:06:56,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:56,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35880563] [2021-06-05 05:06:56,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:56,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:56,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:56,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35880563] [2021-06-05 05:06:56,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35880563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:56,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990052153] [2021-06-05 05:06:56,688 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 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 [2021-06-05 05:06:56,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:06:56,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:56,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:56,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:56,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:56,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:56,839 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 16 treesize of output 12 [2021-06-05 05:06:56,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:56,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:56,842 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 15 treesize of output 11 [2021-06-05 05:06:56,842 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:56,862 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:06:56,862 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:56,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:06:56,863 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:06:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:56,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990052153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:56,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:56,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:56,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057774714] [2021-06-05 05:06:56,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:56,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:56,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:56,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:56,886 INFO L87 Difference]: Start difference. First operand 252 states and 613 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) [2021-06-05 05:06:57,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:57,331 INFO L93 Difference]: Finished difference Result 404 states and 917 transitions. [2021-06-05 05:06:57,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:06:57,331 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 [2021-06-05 05:06:57,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:57,331 INFO L225 Difference]: With dead ends: 404 [2021-06-05 05:06:57,331 INFO L226 Difference]: Without dead ends: 404 [2021-06-05 05:06:57,331 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 408.0ms TimeCoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:06:57,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2021-06-05 05:06:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 253. [2021-06-05 05:06:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4404761904761907) internal successors, (615), 252 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) [2021-06-05 05:06:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 615 transitions. [2021-06-05 05:06:57,334 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 615 transitions. Word has length 19 [2021-06-05 05:06:57,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:57,334 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 615 transitions. [2021-06-05 05:06:57,334 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) [2021-06-05 05:06:57,334 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 615 transitions. [2021-06-05 05:06:57,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:57,334 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:57,334 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:57,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 589 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15977 [2021-06-05 05:06:57,535 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:57,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:57,535 INFO L82 PathProgramCache]: Analyzing trace with hash 2078585744, now seen corresponding path program 586 times [2021-06-05 05:06:57,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:57,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280061196] [2021-06-05 05:06:57,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:57,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:57,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280061196] [2021-06-05 05:06:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280061196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:57,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985495132] [2021-06-05 05:06:57,603 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 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 [2021-06-05 05:06:57,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:06:57,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:57,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:57,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:57,782 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 16 treesize of output 12 [2021-06-05 05:06:57,782 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:57,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:57,785 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 15 treesize of output 11 [2021-06-05 05:06:57,785 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:57,813 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:06:57,813 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:57,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:57,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:06:57,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:57,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985495132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:57,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:57,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:57,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046837058] [2021-06-05 05:06:57,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:57,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:57,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:57,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:57,864 INFO L87 Difference]: Start difference. First operand 253 states and 615 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) [2021-06-05 05:06:58,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:58,602 INFO L93 Difference]: Finished difference Result 333 states and 757 transitions. [2021-06-05 05:06:58,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:06:58,602 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 [2021-06-05 05:06:58,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:58,602 INFO L225 Difference]: With dead ends: 333 [2021-06-05 05:06:58,602 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 05:06:58,602 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 678.0ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:06:58,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 05:06:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 255. [2021-06-05 05:06:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:58,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-06-05 05:06:58,605 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-06-05 05:06:58,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:58,605 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-06-05 05:06:58,605 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) [2021-06-05 05:06:58,605 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-06-05 05:06:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:58,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:58,605 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:06:58,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15981 [2021-06-05 05:06:58,806 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:06:58,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:06:58,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1825430479, now seen corresponding path program 587 times [2021-06-05 05:06:58,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:06:58,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13447136] [2021-06-05 05:06:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:06:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:06:58,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:58,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:06:58,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13447136] [2021-06-05 05:06:58,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13447136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:58,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868174051] [2021-06-05 05:06:58,873 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 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 [2021-06-05 05:06:58,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:06:58,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:06:58,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:06:58,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:06:59,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:06:59,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,021 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 [2021-06-05 05:06:59,021 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,024 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 [2021-06-05 05:06:59,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:06:59,027 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 15 treesize of output 11 [2021-06-05 05:06:59,027 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:06:59,062 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:06:59,062 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:06:59,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:06:59,063 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:06:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:06:59,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868174051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:06:59,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:06:59,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:06:59,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361878908] [2021-06-05 05:06:59,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:06:59,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:06:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:06:59,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:06:59,107 INFO L87 Difference]: Start difference. First operand 255 states and 622 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) [2021-06-05 05:06:59,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:06:59,850 INFO L93 Difference]: Finished difference Result 463 states and 1023 transitions. [2021-06-05 05:06:59,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:06:59,851 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 [2021-06-05 05:06:59,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:06:59,851 INFO L225 Difference]: With dead ends: 463 [2021-06-05 05:06:59,851 INFO L226 Difference]: Without dead ends: 463 [2021-06-05 05:06:59,851 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 693.9ms TimeCoverageRelationStatistics Valid=190, Invalid=1142, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:06:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-06-05 05:06:59,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 255. [2021-06-05 05:06:59,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.4488188976377954) internal successors, (622), 254 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:06:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 622 transitions. [2021-06-05 05:06:59,854 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 622 transitions. Word has length 19 [2021-06-05 05:06:59,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:06:59,854 INFO L482 AbstractCegarLoop]: Abstraction has 255 states and 622 transitions. [2021-06-05 05:06:59,854 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) [2021-06-05 05:06:59,854 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 622 transitions. [2021-06-05 05:06:59,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:06:59,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:06:59,855 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:00,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15999 [2021-06-05 05:07:00,055 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:00,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1378092756, now seen corresponding path program 588 times [2021-06-05 05:07:00,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:00,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706137017] [2021-06-05 05:07:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:00,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:00,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706137017] [2021-06-05 05:07:00,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706137017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:00,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099300078] [2021-06-05 05:07:00,126 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 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 [2021-06-05 05:07:00,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:07:00,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:00,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:00,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:00,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:00,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:00,301 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 16 treesize of output 12 [2021-06-05 05:07:00,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:00,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:00,304 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 15 treesize of output 11 [2021-06-05 05:07:00,305 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:00,332 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:07:00,333 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:00,333 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:00,333 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:07:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:00,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099300078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:00,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:00,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:00,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462049196] [2021-06-05 05:07:00,376 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:00,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:00,376 INFO L87 Difference]: Start difference. First operand 255 states and 622 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) [2021-06-05 05:07:00,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:00,786 INFO L93 Difference]: Finished difference Result 303 states and 715 transitions. [2021-06-05 05:07:00,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:07:00,787 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 [2021-06-05 05:07:00,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:00,787 INFO L225 Difference]: With dead ends: 303 [2021-06-05 05:07:00,787 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 05:07:00,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 427.5ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:07:00,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 05:07:00,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 254. [2021-06-05 05:07:00,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4426877470355732) internal successors, (618), 253 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:00,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 618 transitions. [2021-06-05 05:07:00,790 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 618 transitions. Word has length 19 [2021-06-05 05:07:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:00,790 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 618 transitions. [2021-06-05 05:07:00,790 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) [2021-06-05 05:07:00,790 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 618 transitions. [2021-06-05 05:07:00,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:00,790 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:00,790 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:00,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16009,592 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:00,990 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:00,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:00,991 INFO L82 PathProgramCache]: Analyzing trace with hash -604704489, now seen corresponding path program 589 times [2021-06-05 05:07:00,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:00,991 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390649090] [2021-06-05 05:07:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:01,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:01,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:01,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390649090] [2021-06-05 05:07:01,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390649090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:01,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814567326] [2021-06-05 05:07:01,058 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 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 [2021-06-05 05:07:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:01,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:01,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:01,201 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:01,202 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 16 treesize of output 12 [2021-06-05 05:07:01,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,204 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 [2021-06-05 05:07:01,205 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:01,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:01,208 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 15 treesize of output 11 [2021-06-05 05:07:01,209 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,211 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 [2021-06-05 05:07:01,212 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:01,245 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:07:01,246 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:01,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:01,247 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:07:01,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:01,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814567326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:01,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:01,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:01,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393276804] [2021-06-05 05:07:01,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:01,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:01,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:01,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:01,315 INFO L87 Difference]: Start difference. First operand 254 states and 618 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) [2021-06-05 05:07:02,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:02,317 INFO L93 Difference]: Finished difference Result 392 states and 889 transitions. [2021-06-05 05:07:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:07:02,317 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 [2021-06-05 05:07:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:02,318 INFO L225 Difference]: With dead ends: 392 [2021-06-05 05:07:02,318 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 05:07:02,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 947.9ms TimeCoverageRelationStatistics Valid=227, Invalid=1579, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:07:02,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 05:07:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 245. [2021-06-05 05:07:02,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4549180327868854) internal successors, (599), 244 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) [2021-06-05 05:07:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 599 transitions. [2021-06-05 05:07:02,320 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 599 transitions. Word has length 19 [2021-06-05 05:07:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:02,320 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 599 transitions. [2021-06-05 05:07:02,320 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) [2021-06-05 05:07:02,320 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 599 transitions. [2021-06-05 05:07:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:02,321 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:02,321 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:02,521 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 593 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16025 [2021-06-05 05:07:02,521 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:02,521 INFO L82 PathProgramCache]: Analyzing trace with hash 928182347, now seen corresponding path program 590 times [2021-06-05 05:07:02,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:02,522 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508471005] [2021-06-05 05:07:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:02,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:02,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:02,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508471005] [2021-06-05 05:07:02,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508471005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:02,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932861090] [2021-06-05 05:07:02,582 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 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 [2021-06-05 05:07:02,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:02,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:02,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:02,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:02,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:02,727 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 16 treesize of output 12 [2021-06-05 05:07:02,727 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:02,730 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 15 treesize of output 11 [2021-06-05 05:07:02,730 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,750 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:07:02,751 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:02,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:02,751 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:07:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:02,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932861090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:02,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:02,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:02,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693968632] [2021-06-05 05:07:02,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:02,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:02,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:02,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:02,772 INFO L87 Difference]: Start difference. First operand 245 states and 599 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:07:03,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:03,077 INFO L93 Difference]: Finished difference Result 371 states and 827 transitions. [2021-06-05 05:07:03,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:03,077 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:07:03,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:03,078 INFO L225 Difference]: With dead ends: 371 [2021-06-05 05:07:03,078 INFO L226 Difference]: Without dead ends: 371 [2021-06-05 05:07:03,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 227.4ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:03,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-06-05 05:07:03,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 247. [2021-06-05 05:07:03,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.459349593495935) internal successors, (605), 246 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) [2021-06-05 05:07:03,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 605 transitions. [2021-06-05 05:07:03,080 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 605 transitions. Word has length 19 [2021-06-05 05:07:03,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:03,080 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 605 transitions. [2021-06-05 05:07:03,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:07:03,080 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 605 transitions. [2021-06-05 05:07:03,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:03,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:03,081 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:03,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 594 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16038 [2021-06-05 05:07:03,281 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:03,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash -54385178, now seen corresponding path program 591 times [2021-06-05 05:07:03,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:03,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739706174] [2021-06-05 05:07:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:03,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:03,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739706174] [2021-06-05 05:07:03,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739706174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:03,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971406568] [2021-06-05 05:07:03,338 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 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 [2021-06-05 05:07:03,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:07:03,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:03,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:03,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:03,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:03,500 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 16 treesize of output 12 [2021-06-05 05:07:03,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:03,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:03,503 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 15 treesize of output 11 [2021-06-05 05:07:03,504 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:03,532 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:07:03,532 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:03,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:03,533 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:07:03,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:03,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971406568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:03,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:03,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:03,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000839508] [2021-06-05 05:07:03,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:03,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:03,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:03,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:03,581 INFO L87 Difference]: Start difference. First operand 247 states and 605 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) [2021-06-05 05:07:04,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:04,183 INFO L93 Difference]: Finished difference Result 367 states and 804 transitions. [2021-06-05 05:07:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:07:04,183 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 [2021-06-05 05:07:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:04,183 INFO L225 Difference]: With dead ends: 367 [2021-06-05 05:07:04,184 INFO L226 Difference]: Without dead ends: 361 [2021-06-05 05:07:04,184 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 531.5ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:07:04,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-06-05 05:07:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 249. [2021-06-05 05:07:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 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) [2021-06-05 05:07:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-06-05 05:07:04,186 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-06-05 05:07:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:04,186 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-06-05 05:07:04,186 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) [2021-06-05 05:07:04,186 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-06-05 05:07:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:04,187 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:04,187 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:04,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 595 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16042 [2021-06-05 05:07:04,401 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:04,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash -307540443, now seen corresponding path program 592 times [2021-06-05 05:07:04,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:04,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30716240] [2021-06-05 05:07:04,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:04,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:04,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30716240] [2021-06-05 05:07:04,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30716240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:04,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652657882] [2021-06-05 05:07:04,460 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 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 [2021-06-05 05:07:04,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:04,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:04,596 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 [2021-06-05 05:07:04,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:04,599 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 [2021-06-05 05:07:04,600 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:04,603 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:04,603 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 16 treesize of output 12 [2021-06-05 05:07:04,604 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:04,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:04,607 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 15 treesize of output 11 [2021-06-05 05:07:04,607 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:04,642 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:07:04,642 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:04,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:04,643 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:07:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:04,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652657882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:04,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:04,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:04,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703308167] [2021-06-05 05:07:04,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:04,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:04,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:04,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:04,686 INFO L87 Difference]: Start difference. First operand 249 states and 612 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:07:04,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:04,984 INFO L93 Difference]: Finished difference Result 420 states and 920 transitions. [2021-06-05 05:07:04,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:07:04,984 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:07:04,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:04,984 INFO L225 Difference]: With dead ends: 420 [2021-06-05 05:07:04,984 INFO L226 Difference]: Without dead ends: 420 [2021-06-05 05:07:04,985 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 194.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:07:04,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-06-05 05:07:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 249. [2021-06-05 05:07:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 2.467741935483871) internal successors, (612), 248 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) [2021-06-05 05:07:04,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 612 transitions. [2021-06-05 05:07:04,987 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 612 transitions. Word has length 19 [2021-06-05 05:07:04,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:04,987 INFO L482 AbstractCegarLoop]: Abstraction has 249 states and 612 transitions. [2021-06-05 05:07:04,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:07:04,987 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 612 transitions. [2021-06-05 05:07:04,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:04,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:04,988 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:05,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16060,596 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:05,196 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:05,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:05,196 INFO L82 PathProgramCache]: Analyzing trace with hash -754878166, now seen corresponding path program 593 times [2021-06-05 05:07:05,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:05,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099746721] [2021-06-05 05:07:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:05,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:05,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099746721] [2021-06-05 05:07:05,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099746721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:05,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399387870] [2021-06-05 05:07:05,254 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 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 [2021-06-05 05:07:05,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:07:05,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:05,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:05,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:05,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:05,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:05,449 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 15 treesize of output 11 [2021-06-05 05:07:05,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:05,452 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:05,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:07:05,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:05,483 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:07:05,483 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:05,483 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:05,483 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:07:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:05,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399387870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:05,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:05,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:05,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70449697] [2021-06-05 05:07:05,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:05,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:05,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:05,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:05,525 INFO L87 Difference]: Start difference. First operand 249 states and 612 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) [2021-06-05 05:07:05,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:05,893 INFO L93 Difference]: Finished difference Result 337 states and 762 transitions. [2021-06-05 05:07:05,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:05,893 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 [2021-06-05 05:07:05,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:05,894 INFO L225 Difference]: With dead ends: 337 [2021-06-05 05:07:05,894 INFO L226 Difference]: Without dead ends: 337 [2021-06-05 05:07:05,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 328.6ms TimeCoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:07:05,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-06-05 05:07:05,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 248. [2021-06-05 05:07:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.4615384615384617) internal successors, (608), 247 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:05,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 608 transitions. [2021-06-05 05:07:05,896 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 608 transitions. Word has length 19 [2021-06-05 05:07:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:05,896 INFO L482 AbstractCegarLoop]: Abstraction has 248 states and 608 transitions. [2021-06-05 05:07:05,896 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) [2021-06-05 05:07:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 608 transitions. [2021-06-05 05:07:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:05,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:05,897 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:06,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16069 [2021-06-05 05:07:06,097 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:06,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:06,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1557291885, now seen corresponding path program 594 times [2021-06-05 05:07:06,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:06,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241238726] [2021-06-05 05:07:06,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:06,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:06,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241238726] [2021-06-05 05:07:06,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241238726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:06,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065722449] [2021-06-05 05:07:06,161 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 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 [2021-06-05 05:07:06,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:07:06,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:06,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:06,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:06,305 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 [2021-06-05 05:07:06,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:06,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:06,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:06,309 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 15 treesize of output 11 [2021-06-05 05:07:06,310 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:06,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:06,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:07:06,329 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:06,332 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:06,332 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:06,391 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:07:06,391 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:06,392 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:06,392 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:07:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:06,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065722449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:06,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:06,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:06,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828742102] [2021-06-05 05:07:06,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:06,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:06,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:06,454 INFO L87 Difference]: Start difference. First operand 248 states and 608 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) [2021-06-05 05:07:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:06,940 INFO L93 Difference]: Finished difference Result 420 states and 904 transitions. [2021-06-05 05:07:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:07:06,940 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 [2021-06-05 05:07:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:06,941 INFO L225 Difference]: With dead ends: 420 [2021-06-05 05:07:06,941 INFO L226 Difference]: Without dead ends: 416 [2021-06-05 05:07:06,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 411.3ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:07:06,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2021-06-05 05:07:06,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 246. [2021-06-05 05:07:06,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4612244897959186) internal successors, (603), 245 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) [2021-06-05 05:07:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 603 transitions. [2021-06-05 05:07:06,943 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 603 transitions. Word has length 19 [2021-06-05 05:07:06,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:06,944 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 603 transitions. [2021-06-05 05:07:06,944 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) [2021-06-05 05:07:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 603 transitions. [2021-06-05 05:07:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:06,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:06,944 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:07,144 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16085,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:07,144 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:07,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash 533360144, now seen corresponding path program 595 times [2021-06-05 05:07:07,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:07,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708550939] [2021-06-05 05:07:07,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:07,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:07,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:07,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708550939] [2021-06-05 05:07:07,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708550939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:07,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115189302] [2021-06-05 05:07:07,203 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 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 [2021-06-05 05:07:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:07,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:07,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:07,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:07,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:07,360 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 15 treesize of output 11 [2021-06-05 05:07:07,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:07,363 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:07,363 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 16 treesize of output 12 [2021-06-05 05:07:07,364 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:07,389 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:07,389 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:07,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:07,390 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:07,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:07,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115189302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:07,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:07,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:07,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284247391] [2021-06-05 05:07:07,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:07,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:07,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:07,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:07,439 INFO L87 Difference]: Start difference. First operand 246 states and 603 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) [2021-06-05 05:07:09,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:09,248 INFO L93 Difference]: Finished difference Result 638 states and 1284 transitions. [2021-06-05 05:07:09,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:07:09,248 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 [2021-06-05 05:07:09,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:09,249 INFO L225 Difference]: With dead ends: 638 [2021-06-05 05:07:09,249 INFO L226 Difference]: Without dead ends: 632 [2021-06-05 05:07:09,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1476 ImplicationChecksByTransitivity, 1642.6ms TimeCoverageRelationStatistics Valid=546, Invalid=4010, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:07:09,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-06-05 05:07:09,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 264. [2021-06-05 05:07:09,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-06-05 05:07:09,253 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-06-05 05:07:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:09,253 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-06-05 05:07:09,253 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) [2021-06-05 05:07:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-06-05 05:07:09,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:09,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:09,253 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:09,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16098 [2021-06-05 05:07:09,453 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:09,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:09,454 INFO L82 PathProgramCache]: Analyzing trace with hash 280204879, now seen corresponding path program 596 times [2021-06-05 05:07:09,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:09,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611467503] [2021-06-05 05:07:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:09,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:09,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611467503] [2021-06-05 05:07:09,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611467503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:09,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331649025] [2021-06-05 05:07:09,512 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 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 [2021-06-05 05:07:09,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:09,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:09,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:09,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:09,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:09,687 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 16 treesize of output 12 [2021-06-05 05:07:09,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,691 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 [2021-06-05 05:07:09,692 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,733 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:07:09,733 INFO L518 ElimStorePlain]: Eliminatee v_prenex_626 vanished before elimination [2021-06-05 05:07:09,735 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 [2021-06-05 05:07:09,736 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:09,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:09,750 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:09,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:09,751 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:09,802 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:09,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331649025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:09,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:09,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:09,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667729501] [2021-06-05 05:07:09,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:09,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:09,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:09,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:09,803 INFO L87 Difference]: Start difference. First operand 264 states and 670 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:07:10,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:10,191 INFO L93 Difference]: Finished difference Result 389 states and 875 transitions. [2021-06-05 05:07:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 [2021-06-05 05:07:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:10,191 INFO L225 Difference]: With dead ends: 389 [2021-06-05 05:07:10,191 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 05:07:10,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 332.1ms TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:07:10,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 05:07:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 264. [2021-06-05 05:07:10,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.547528517110266) internal successors, (670), 263 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:10,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 670 transitions. [2021-06-05 05:07:10,194 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 670 transitions. Word has length 19 [2021-06-05 05:07:10,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:10,194 INFO L482 AbstractCegarLoop]: Abstraction has 264 states and 670 transitions. [2021-06-05 05:07:10,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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) [2021-06-05 05:07:10,194 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 670 transitions. [2021-06-05 05:07:10,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:10,195 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:10,195 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:10,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16108,600 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:10,395 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:10,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:10,395 INFO L82 PathProgramCache]: Analyzing trace with hash -167132844, now seen corresponding path program 597 times [2021-06-05 05:07:10,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:10,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388574809] [2021-06-05 05:07:10,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:10,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:10,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:10,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:10,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388574809] [2021-06-05 05:07:10,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388574809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:10,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545512444] [2021-06-05 05:07:10,454 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 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 [2021-06-05 05:07:10,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:07:10,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:10,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:10,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:10,608 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:10,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:10,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:07:10,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:10,612 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:10,612 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 15 treesize of output 11 [2021-06-05 05:07:10,613 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:10,638 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:10,638 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:10,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:10,639 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:10,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545512444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:10,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:10,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:10,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169733034] [2021-06-05 05:07:10,680 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:10,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:10,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:10,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:10,681 INFO L87 Difference]: Start difference. First operand 264 states and 670 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) [2021-06-05 05:07:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:11,537 INFO L93 Difference]: Finished difference Result 512 states and 1095 transitions. [2021-06-05 05:07:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:07:11,537 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 [2021-06-05 05:07:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:11,538 INFO L225 Difference]: With dead ends: 512 [2021-06-05 05:07:11,538 INFO L226 Difference]: Without dead ends: 512 [2021-06-05 05:07:11,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 774.5ms TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:07:11,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-06-05 05:07:11,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 258. [2021-06-05 05:07:11,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.5136186770428015) internal successors, (646), 257 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:11,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 646 transitions. [2021-06-05 05:07:11,541 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 646 transitions. Word has length 19 [2021-06-05 05:07:11,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:11,541 INFO L482 AbstractCegarLoop]: Abstraction has 258 states and 646 transitions. [2021-06-05 05:07:11,541 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) [2021-06-05 05:07:11,541 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 646 transitions. [2021-06-05 05:07:11,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:11,541 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:11,541 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:11,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16119,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:11,742 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:11,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:11,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2145037207, now seen corresponding path program 598 times [2021-06-05 05:07:11,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:11,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737935803] [2021-06-05 05:07:11,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:11,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:11,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737935803] [2021-06-05 05:07:11,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737935803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:11,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433480552] [2021-06-05 05:07:11,799 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 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:11,825 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:11,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:11,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:11,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:11,965 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:11,966 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:11,966 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 16 treesize of output 12 [2021-06-05 05:07:11,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:11,969 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 [2021-06-05 05:07:11,970 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:12,010 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:07:12,012 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 [2021-06-05 05:07:12,012 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:12,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:12,026 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:12,026 INFO L518 ElimStorePlain]: Eliminatee v_prenex_629 vanished before elimination [2021-06-05 05:07:12,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:12,027 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:12,098 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:12,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433480552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:12,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:12,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:12,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354211399] [2021-06-05 05:07:12,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:12,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:12,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:12,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:12,099 INFO L87 Difference]: Start difference. First operand 258 states and 646 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) [2021-06-05 05:07:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:12,741 INFO L93 Difference]: Finished difference Result 411 states and 891 transitions. [2021-06-05 05:07:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:07:12,742 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 [2021-06-05 05:07:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:12,742 INFO L225 Difference]: With dead ends: 411 [2021-06-05 05:07:12,742 INFO L226 Difference]: Without dead ends: 407 [2021-06-05 05:07:12,742 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 598.7ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:07:12,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-06-05 05:07:12,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 257. [2021-06-05 05:07:12,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.51171875) internal successors, (643), 256 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) [2021-06-05 05:07:12,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 643 transitions. [2021-06-05 05:07:12,745 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 643 transitions. Word has length 19 [2021-06-05 05:07:12,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:12,745 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 643 transitions. [2021-06-05 05:07:12,745 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) [2021-06-05 05:07:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 643 transitions. [2021-06-05 05:07:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:12,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:12,745 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:12,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16127,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:12,946 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:12,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:12,946 INFO L82 PathProgramCache]: Analyzing trace with hash -702362646, now seen corresponding path program 599 times [2021-06-05 05:07:12,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:12,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136899088] [2021-06-05 05:07:12,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:13,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:13,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136899088] [2021-06-05 05:07:13,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136899088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:13,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739190229] [2021-06-05 05:07:13,006 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 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 [2021-06-05 05:07:13,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:07:13,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:13,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:13,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:13,165 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:13,165 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 15 treesize of output 11 [2021-06-05 05:07:13,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:13,168 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:13,168 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 16 treesize of output 12 [2021-06-05 05:07:13,169 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:13,190 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:07:13,190 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:13,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:13,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:07:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:13,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739190229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:13,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:13,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:13,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009930013] [2021-06-05 05:07:13,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:13,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:13,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:13,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:13,214 INFO L87 Difference]: Start difference. First operand 257 states and 643 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) [2021-06-05 05:07:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:13,668 INFO L93 Difference]: Finished difference Result 417 states and 924 transitions. [2021-06-05 05:07:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:07:13,669 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 [2021-06-05 05:07:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:13,669 INFO L225 Difference]: With dead ends: 417 [2021-06-05 05:07:13,669 INFO L226 Difference]: Without dead ends: 417 [2021-06-05 05:07:13,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:07:13,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-06-05 05:07:13,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 254. [2021-06-05 05:07:13,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 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) [2021-06-05 05:07:13,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-06-05 05:07:13,672 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-06-05 05:07:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:13,672 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-06-05 05:07:13,672 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) [2021-06-05 05:07:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-06-05 05:07:13,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:13,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:13,672 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:13,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16141 [2021-06-05 05:07:13,873 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:13,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:13,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1074218933, now seen corresponding path program 600 times [2021-06-05 05:07:13,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:13,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509979107] [2021-06-05 05:07:13,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:13,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:13,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509979107] [2021-06-05 05:07:13,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509979107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:13,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643792780] [2021-06-05 05:07:13,934 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 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 [2021-06-05 05:07:13,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:07:13,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:13,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:13,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:14,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:14,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:14,164 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 15 treesize of output 11 [2021-06-05 05:07:14,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:14,166 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:14,167 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:14,201 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:07:14,201 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:14,203 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 [2021-06-05 05:07:14,204 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:14,216 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:14,217 INFO L518 ElimStorePlain]: Eliminatee v_prenex_634 vanished before elimination [2021-06-05 05:07:14,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:14,217 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:07:14,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:14,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643792780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:14,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:14,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 17 [2021-06-05 05:07:14,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300667951] [2021-06-05 05:07:14,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:14,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:14,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:14,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:14,245 INFO L87 Difference]: Start difference. First operand 254 states and 628 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) [2021-06-05 05:07:14,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:14,744 INFO L93 Difference]: Finished difference Result 325 states and 743 transitions. [2021-06-05 05:07:14,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:07:14,745 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 [2021-06-05 05:07:14,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:14,745 INFO L225 Difference]: With dead ends: 325 [2021-06-05 05:07:14,745 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 05:07:14,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 484.9ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:07:14,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 05:07:14,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 253. [2021-06-05 05:07:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-06-05 05:07:14,748 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-06-05 05:07:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:14,748 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-06-05 05:07:14,748 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) [2021-06-05 05:07:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-06-05 05:07:14,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:14,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:14,748 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:14,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16145,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:14,949 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:14,949 INFO L82 PathProgramCache]: Analyzing trace with hash 1573595942, now seen corresponding path program 601 times [2021-06-05 05:07:14,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:14,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259088726] [2021-06-05 05:07:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:15,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:15,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:15,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259088726] [2021-06-05 05:07:15,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259088726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:15,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229854773] [2021-06-05 05:07:15,026 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 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 [2021-06-05 05:07:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:15,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:15,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:15,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,204 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,204 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 15 treesize of output 11 [2021-06-05 05:07:15,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:15,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:15,207 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 16 treesize of output 12 [2021-06-05 05:07:15,208 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:15,234 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:15,235 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:15,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:15,235 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:15,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229854773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:15,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:15,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:15,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758064744] [2021-06-05 05:07:15,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:15,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:15,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:15,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:15,287 INFO L87 Difference]: Start difference. First operand 253 states and 625 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) [2021-06-05 05:07:17,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:17,625 INFO L93 Difference]: Finished difference Result 573 states and 1191 transitions. [2021-06-05 05:07:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:07:17,625 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 [2021-06-05 05:07:17,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:17,625 INFO L225 Difference]: With dead ends: 573 [2021-06-05 05:07:17,626 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 05:07:17,626 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2223.2ms TimeCoverageRelationStatistics Valid=626, Invalid=3406, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:07:17,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 05:07:17,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 266. [2021-06-05 05:07:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.5283018867924527) internal successors, (670), 265 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:17,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 670 transitions. [2021-06-05 05:07:17,629 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 670 transitions. Word has length 19 [2021-06-05 05:07:17,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:17,629 INFO L482 AbstractCegarLoop]: Abstraction has 266 states and 670 transitions. [2021-06-05 05:07:17,629 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) [2021-06-05 05:07:17,629 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 670 transitions. [2021-06-05 05:07:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:17,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:17,629 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:17,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16162,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:17,830 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:17,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:17,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1320440677, now seen corresponding path program 602 times [2021-06-05 05:07:17,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:17,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167590540] [2021-06-05 05:07:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:17,897 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:17,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:17,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167590540] [2021-06-05 05:07:17,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167590540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:17,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505704840] [2021-06-05 05:07:17,897 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 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 [2021-06-05 05:07:17,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:17,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:17,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:17,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:18,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:18,109 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:18,109 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 16 treesize of output 12 [2021-06-05 05:07:18,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,112 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 [2021-06-05 05:07:18,113 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,154 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:07:18,154 INFO L518 ElimStorePlain]: Eliminatee v_prenex_637 vanished before elimination [2021-06-05 05:07:18,156 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 [2021-06-05 05:07:18,157 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:18,171 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:18,171 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:18,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:18,172 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:18,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505704840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:18,227 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:18,227 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:18,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776247737] [2021-06-05 05:07:18,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:18,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:18,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:18,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:18,227 INFO L87 Difference]: Start difference. First operand 266 states and 670 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) [2021-06-05 05:07:18,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:18,714 INFO L93 Difference]: Finished difference Result 369 states and 833 transitions. [2021-06-05 05:07:18,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:07:18,715 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 [2021-06-05 05:07:18,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:18,715 INFO L225 Difference]: With dead ends: 369 [2021-06-05 05:07:18,715 INFO L226 Difference]: Without dead ends: 363 [2021-06-05 05:07:18,715 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 483.1ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:07:18,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-06-05 05:07:18,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 265. [2021-06-05 05:07:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.522727272727273) internal successors, (666), 264 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 666 transitions. [2021-06-05 05:07:18,718 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 666 transitions. Word has length 19 [2021-06-05 05:07:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:18,718 INFO L482 AbstractCegarLoop]: Abstraction has 265 states and 666 transitions. [2021-06-05 05:07:18,718 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) [2021-06-05 05:07:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 666 transitions. [2021-06-05 05:07:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:18,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:18,718 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:18,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16172,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:18,919 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash 873102954, now seen corresponding path program 603 times [2021-06-05 05:07:18,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:18,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288190641] [2021-06-05 05:07:18,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:18,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:18,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288190641] [2021-06-05 05:07:18,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288190641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:18,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444947126] [2021-06-05 05:07:18,990 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 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 [2021-06-05 05:07:19,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:07:19,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:19,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:19,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:19,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:19,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:07:19,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:19,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:19,187 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 16 treesize of output 12 [2021-06-05 05:07:19,188 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:19,213 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:19,213 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:19,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:19,214 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:19,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:19,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444947126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:19,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:19,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:19,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907500130] [2021-06-05 05:07:19,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:19,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:19,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:19,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:19,257 INFO L87 Difference]: Start difference. First operand 265 states and 666 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) [2021-06-05 05:07:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:20,578 INFO L93 Difference]: Finished difference Result 499 states and 1069 transitions. [2021-06-05 05:07:20,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:07:20,578 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 [2021-06-05 05:07:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:20,578 INFO L225 Difference]: With dead ends: 499 [2021-06-05 05:07:20,578 INFO L226 Difference]: Without dead ends: 495 [2021-06-05 05:07:20,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1260.4ms TimeCoverageRelationStatistics Valid=354, Invalid=1716, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:07:20,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-05 05:07:20,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 254. [2021-06-05 05:07:20,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.4822134387351777) internal successors, (628), 253 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) [2021-06-05 05:07:20,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 628 transitions. [2021-06-05 05:07:20,581 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 628 transitions. Word has length 19 [2021-06-05 05:07:20,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:20,582 INFO L482 AbstractCegarLoop]: Abstraction has 254 states and 628 transitions. [2021-06-05 05:07:20,582 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) [2021-06-05 05:07:20,582 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 628 transitions. [2021-06-05 05:07:20,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:20,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:20,582 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:20,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16189 [2021-06-05 05:07:20,782 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:20,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1109694291, now seen corresponding path program 604 times [2021-06-05 05:07:20,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:20,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449164934] [2021-06-05 05:07:20,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:20,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449164934] [2021-06-05 05:07:20,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449164934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:20,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466556987] [2021-06-05 05:07:20,849 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 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 [2021-06-05 05:07:20,875 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:20,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:20,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:20,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:21,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:21,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:21,045 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 16 treesize of output 12 [2021-06-05 05:07:21,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:21,048 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 [2021-06-05 05:07:21,049 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:21,088 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:07:21,088 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:21,090 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 [2021-06-05 05:07:21,091 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:21,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:21,105 INFO L518 ElimStorePlain]: Eliminatee v_prenex_640 vanished before elimination [2021-06-05 05:07:21,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:21,106 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:21,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466556987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:21,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:21,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:21,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645218841] [2021-06-05 05:07:21,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:21,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:21,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:21,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:21,179 INFO L87 Difference]: Start difference. First operand 254 states and 628 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) [2021-06-05 05:07:21,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:21,848 INFO L93 Difference]: Finished difference Result 335 states and 758 transitions. [2021-06-05 05:07:21,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:07:21,848 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 [2021-06-05 05:07:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:21,848 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:07:21,848 INFO L226 Difference]: Without dead ends: 331 [2021-06-05 05:07:21,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 668.2ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:07:21,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-06-05 05:07:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 253. [2021-06-05 05:07:21,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.4801587301587302) internal successors, (625), 252 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:21,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 625 transitions. [2021-06-05 05:07:21,851 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 625 transitions. Word has length 19 [2021-06-05 05:07:21,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:21,851 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 625 transitions. [2021-06-05 05:07:21,851 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) [2021-06-05 05:07:21,851 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 625 transitions. [2021-06-05 05:07:21,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:21,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:21,851 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:22,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16197,608 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:22,052 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:22,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:22,052 INFO L82 PathProgramCache]: Analyzing trace with hash 337873152, now seen corresponding path program 605 times [2021-06-05 05:07:22,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:22,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591295835] [2021-06-05 05:07:22,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:22,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591295835] [2021-06-05 05:07:22,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591295835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:22,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184942403] [2021-06-05 05:07:22,120 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 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 [2021-06-05 05:07:22,148 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:07:22,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:22,294 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:22,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:22,295 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 15 treesize of output 11 [2021-06-05 05:07:22,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:22,298 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:22,298 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 [2021-06-05 05:07:22,299 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:22,319 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:07:22,319 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:22,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:22,320 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:07:22,341 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:22,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184942403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:22,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:22,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:22,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491352668] [2021-06-05 05:07:22,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:22,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:22,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:22,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:22,342 INFO L87 Difference]: Start difference. First operand 253 states and 625 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) [2021-06-05 05:07:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:23,345 INFO L93 Difference]: Finished difference Result 378 states and 859 transitions. [2021-06-05 05:07:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:07:23,345 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 [2021-06-05 05:07:23,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:23,345 INFO L225 Difference]: With dead ends: 378 [2021-06-05 05:07:23,345 INFO L226 Difference]: Without dead ends: 378 [2021-06-05 05:07:23,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 985.0ms TimeCoverageRelationStatistics Valid=275, Invalid=1365, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:07:23,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-06-05 05:07:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 247. [2021-06-05 05:07:23,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.4552845528455283) internal successors, (604), 246 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) [2021-06-05 05:07:23,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 604 transitions. [2021-06-05 05:07:23,348 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 604 transitions. Word has length 19 [2021-06-05 05:07:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:23,348 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 604 transitions. [2021-06-05 05:07:23,348 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) [2021-06-05 05:07:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 604 transitions. [2021-06-05 05:07:23,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:23,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:23,348 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:23,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16211 [2021-06-05 05:07:23,549 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:23,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:23,549 INFO L82 PathProgramCache]: Analyzing trace with hash -33983135, now seen corresponding path program 606 times [2021-06-05 05:07:23,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:23,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131110672] [2021-06-05 05:07:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:23,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:23,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:23,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131110672] [2021-06-05 05:07:23,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131110672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:23,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415486512] [2021-06-05 05:07:23,618 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 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 [2021-06-05 05:07:23,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:23,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:23,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:23,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:23,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:23,906 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:23,906 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 15 treesize of output 11 [2021-06-05 05:07:23,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:23,909 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:23,909 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:23,944 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:07:23,946 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 [2021-06-05 05:07:23,947 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:23,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:23,960 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:23,960 INFO L518 ElimStorePlain]: Eliminatee v_prenex_645 vanished before elimination [2021-06-05 05:07:23,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:23,961 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:07:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:23,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415486512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:23,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:23,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:23,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054793783] [2021-06-05 05:07:23,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:23,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:23,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:23,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:23,990 INFO L87 Difference]: Start difference. First operand 247 states and 604 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) [2021-06-05 05:07:24,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:24,442 INFO L93 Difference]: Finished difference Result 275 states and 649 transitions. [2021-06-05 05:07:24,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:07:24,443 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 [2021-06-05 05:07:24,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:24,443 INFO L225 Difference]: With dead ends: 275 [2021-06-05 05:07:24,443 INFO L226 Difference]: Without dead ends: 267 [2021-06-05 05:07:24,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 540.5ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:07:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-06-05 05:07:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 246. [2021-06-05 05:07:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.453061224489796) internal successors, (601), 245 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) [2021-06-05 05:07:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 601 transitions. [2021-06-05 05:07:24,445 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 601 transitions. Word has length 19 [2021-06-05 05:07:24,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:24,445 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 601 transitions. [2021-06-05 05:07:24,445 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) [2021-06-05 05:07:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 601 transitions. [2021-06-05 05:07:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:24,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:24,446 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:24,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16215,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:24,646 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:24,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:24,646 INFO L82 PathProgramCache]: Analyzing trace with hash 925618474, now seen corresponding path program 607 times [2021-06-05 05:07:24,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:24,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506232135] [2021-06-05 05:07:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:24,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:24,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:24,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506232135] [2021-06-05 05:07:24,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506232135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:24,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083685173] [2021-06-05 05:07:24,716 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 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 [2021-06-05 05:07:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:24,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:24,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:24,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:24,894 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:24,895 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 16 treesize of output 12 [2021-06-05 05:07:24,895 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:24,897 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 15 treesize of output 11 [2021-06-05 05:07:24,898 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,918 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:07:24,918 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:24,919 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:24,919 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:07:24,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:24,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083685173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:24,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:24,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:24,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304468978] [2021-06-05 05:07:24,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:24,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:24,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:24,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:24,941 INFO L87 Difference]: Start difference. First operand 246 states and 601 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) [2021-06-05 05:07:25,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:25,311 INFO L93 Difference]: Finished difference Result 317 states and 732 transitions. [2021-06-05 05:07:25,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:07:25,311 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 [2021-06-05 05:07:25,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:25,311 INFO L225 Difference]: With dead ends: 317 [2021-06-05 05:07:25,311 INFO L226 Difference]: Without dead ends: 317 [2021-06-05 05:07:25,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:07:25,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-06-05 05:07:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 240. [2021-06-05 05:07:25,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.430962343096234) internal successors, (581), 239 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:25,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 581 transitions. [2021-06-05 05:07:25,314 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 581 transitions. Word has length 19 [2021-06-05 05:07:25,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:25,314 INFO L482 AbstractCegarLoop]: Abstraction has 240 states and 581 transitions. [2021-06-05 05:07:25,314 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) [2021-06-05 05:07:25,314 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 581 transitions. [2021-06-05 05:07:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:25,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:25,314 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:25,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 611 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16231 [2021-06-05 05:07:25,514 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1046675667, now seen corresponding path program 608 times [2021-06-05 05:07:25,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:25,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440810771] [2021-06-05 05:07:25,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:07:25,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440810771] [2021-06-05 05:07:25,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440810771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:25,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037916893] [2021-06-05 05:07:25,584 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 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 [2021-06-05 05:07:25,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:25,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:25,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:25,859 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:25,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:25,860 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 15 treesize of output 11 [2021-06-05 05:07:25,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:25,863 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:25,863 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:25,897 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:07:25,899 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 [2021-06-05 05:07:25,900 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:25,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:25,913 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:25,913 INFO L518 ElimStorePlain]: Eliminatee v_prenex_650 vanished before elimination [2021-06-05 05:07:25,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:25,914 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:07:25,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:25,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037916893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:25,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:25,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 18 [2021-06-05 05:07:25,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197178398] [2021-06-05 05:07:25,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:25,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:25,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:25,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:25,942 INFO L87 Difference]: Start difference. First operand 240 states and 581 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) [2021-06-05 05:07:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:26,335 INFO L93 Difference]: Finished difference Result 261 states and 614 transitions. [2021-06-05 05:07:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:26,336 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 [2021-06-05 05:07:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:26,336 INFO L225 Difference]: With dead ends: 261 [2021-06-05 05:07:26,336 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 05:07:26,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:07:26,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 05:07:26,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 239. [2021-06-05 05:07:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:26,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-06-05 05:07:26,338 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-06-05 05:07:26,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:26,338 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-06-05 05:07:26,338 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) [2021-06-05 05:07:26,338 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-06-05 05:07:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:26,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:26,339 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:26,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16235 [2021-06-05 05:07:26,539 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:26,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:26,539 INFO L82 PathProgramCache]: Analyzing trace with hash -538832688, now seen corresponding path program 609 times [2021-06-05 05:07:26,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:26,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23806346] [2021-06-05 05:07:26,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:26,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:26,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:26,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23806346] [2021-06-05 05:07:26,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23806346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:26,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444401358] [2021-06-05 05:07:26,622 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 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 [2021-06-05 05:07:26,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:07:26,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:26,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:26,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:26,808 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:26,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:26,809 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 15 treesize of output 11 [2021-06-05 05:07:26,810 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:26,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:26,812 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 16 treesize of output 12 [2021-06-05 05:07:26,813 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:26,838 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:26,838 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:26,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:26,839 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:26,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444401358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:26,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:26,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:26,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112820412] [2021-06-05 05:07:26,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:26,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:26,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:26,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:26,896 INFO L87 Difference]: Start difference. First operand 239 states and 578 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) [2021-06-05 05:07:27,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:27,945 INFO L93 Difference]: Finished difference Result 322 states and 724 transitions. [2021-06-05 05:07:27,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:07:27,946 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 [2021-06-05 05:07:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:27,946 INFO L225 Difference]: With dead ends: 322 [2021-06-05 05:07:27,946 INFO L226 Difference]: Without dead ends: 316 [2021-06-05 05:07:27,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 1074.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1335, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:07:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-06-05 05:07:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 247. [2021-06-05 05:07:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 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) [2021-06-05 05:07:27,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 05:07:27,949 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 05:07:27,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:27,949 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 05:07:27,949 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) [2021-06-05 05:07:27,949 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 05:07:27,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:27,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:27,949 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:28,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16252 [2021-06-05 05:07:28,149 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:28,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:28,150 INFO L82 PathProgramCache]: Analyzing trace with hash -791987953, now seen corresponding path program 610 times [2021-06-05 05:07:28,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:28,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666758331] [2021-06-05 05:07:28,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:28,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666758331] [2021-06-05 05:07:28,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666758331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:28,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591296513] [2021-06-05 05:07:28,230 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 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 [2021-06-05 05:07:28,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:28,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:28,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:28,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:28,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:28,465 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 16 treesize of output 12 [2021-06-05 05:07:28,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:28,468 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 [2021-06-05 05:07:28,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:28,508 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:07:28,508 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:28,510 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 [2021-06-05 05:07:28,511 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:28,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:28,525 INFO L518 ElimStorePlain]: Eliminatee v_prenex_653 vanished before elimination [2021-06-05 05:07:28,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:28,526 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:28,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591296513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:28,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:28,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:28,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796586333] [2021-06-05 05:07:28,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:28,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:28,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:28,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:28,582 INFO L87 Difference]: Start difference. First operand 247 states and 603 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) [2021-06-05 05:07:28,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:28,974 INFO L93 Difference]: Finished difference Result 328 states and 736 transitions. [2021-06-05 05:07:28,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:28,974 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 19 [2021-06-05 05:07:28,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:28,974 INFO L225 Difference]: With dead ends: 328 [2021-06-05 05:07:28,974 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 05:07:28,974 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 415.2ms TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:07:28,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 05:07:28,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 247. [2021-06-05 05:07:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 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) [2021-06-05 05:07:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 05:07:28,977 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 05:07:28,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:28,977 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 05:07:28,977 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) [2021-06-05 05:07:28,977 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 05:07:28,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:28,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:28,977 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:29,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16262,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:29,178 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:29,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:29,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1239325676, now seen corresponding path program 611 times [2021-06-05 05:07:29,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:29,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874440343] [2021-06-05 05:07:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:29,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:29,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:29,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874440343] [2021-06-05 05:07:29,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874440343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:29,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221959546] [2021-06-05 05:07:29,259 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 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 [2021-06-05 05:07:29,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:07:29,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:29,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:29,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:29,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:29,446 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 16 treesize of output 12 [2021-06-05 05:07:29,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:29,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:29,449 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 15 treesize of output 11 [2021-06-05 05:07:29,450 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:29,474 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:29,474 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:29,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:29,475 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:29,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:29,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221959546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:29,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:29,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:29,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714805460] [2021-06-05 05:07:29,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:29,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:29,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:29,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:29,520 INFO L87 Difference]: Start difference. First operand 247 states and 603 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) [2021-06-05 05:07:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:30,506 INFO L93 Difference]: Finished difference Result 335 states and 756 transitions. [2021-06-05 05:07:30,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:07:30,507 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 [2021-06-05 05:07:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:30,507 INFO L225 Difference]: With dead ends: 335 [2021-06-05 05:07:30,507 INFO L226 Difference]: Without dead ends: 335 [2021-06-05 05:07:30,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 972.3ms TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:07:30,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-06-05 05:07:30,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 247. [2021-06-05 05:07:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 2.451219512195122) internal successors, (603), 246 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) [2021-06-05 05:07:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 603 transitions. [2021-06-05 05:07:30,510 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 603 transitions. Word has length 19 [2021-06-05 05:07:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:30,510 INFO L482 AbstractCegarLoop]: Abstraction has 247 states and 603 transitions. [2021-06-05 05:07:30,510 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) [2021-06-05 05:07:30,510 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 603 transitions. [2021-06-05 05:07:30,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:30,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:30,510 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:30,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16273 [2021-06-05 05:07:30,711 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:30,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:30,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1072844375, now seen corresponding path program 612 times [2021-06-05 05:07:30,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:30,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955451836] [2021-06-05 05:07:30,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:30,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:30,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:30,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955451836] [2021-06-05 05:07:30,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955451836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:30,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699448749] [2021-06-05 05:07:30,793 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 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 [2021-06-05 05:07:30,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:30,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:30,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:30,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:31,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:31,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:31,031 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 15 treesize of output 11 [2021-06-05 05:07:31,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:31,034 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:31,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:31,070 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:07:31,070 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:31,072 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 [2021-06-05 05:07:31,073 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:31,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:31,087 INFO L518 ElimStorePlain]: Eliminatee v_prenex_656 vanished before elimination [2021-06-05 05:07:31,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:31,088 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:31,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:31,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699448749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:31,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:31,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:31,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625152350] [2021-06-05 05:07:31,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:31,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:31,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:31,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:31,166 INFO L87 Difference]: Start difference. First operand 247 states and 603 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) [2021-06-05 05:07:31,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:31,727 INFO L93 Difference]: Finished difference Result 332 states and 738 transitions. [2021-06-05 05:07:31,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:07:31,727 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 [2021-06-05 05:07:31,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:31,727 INFO L225 Difference]: With dead ends: 332 [2021-06-05 05:07:31,727 INFO L226 Difference]: Without dead ends: 328 [2021-06-05 05:07:31,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 597.7ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:07:31,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-06-05 05:07:31,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 246. [2021-06-05 05:07:31,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-06-05 05:07:31,730 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-06-05 05:07:31,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:31,730 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-06-05 05:07:31,730 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) [2021-06-05 05:07:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-06-05 05:07:31,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:31,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:31,731 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:31,931 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16281,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:31,931 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:31,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:31,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1774555478, now seen corresponding path program 613 times [2021-06-05 05:07:31,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:31,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663489161] [2021-06-05 05:07:31,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:32,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:32,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:32,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663489161] [2021-06-05 05:07:32,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663489161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:32,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264275012] [2021-06-05 05:07:32,016 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 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 [2021-06-05 05:07:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:32,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:32,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:32,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:32,218 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:32,218 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 16 treesize of output 12 [2021-06-05 05:07:32,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:32,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:32,221 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 15 treesize of output 11 [2021-06-05 05:07:32,222 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:32,243 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:07:32,243 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:32,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:32,244 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:07:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:32,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264275012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:32,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:32,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:32,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950128210] [2021-06-05 05:07:32,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:32,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:32,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:32,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:32,267 INFO L87 Difference]: Start difference. First operand 246 states and 600 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) [2021-06-05 05:07:33,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:33,164 INFO L93 Difference]: Finished difference Result 325 states and 750 transitions. [2021-06-05 05:07:33,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:07:33,164 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 [2021-06-05 05:07:33,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:33,165 INFO L225 Difference]: With dead ends: 325 [2021-06-05 05:07:33,165 INFO L226 Difference]: Without dead ends: 325 [2021-06-05 05:07:33,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 896.3ms TimeCoverageRelationStatistics Valid=199, Invalid=1207, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:07:33,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-06-05 05:07:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 246. [2021-06-05 05:07:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.4489795918367347) internal successors, (600), 245 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 600 transitions. [2021-06-05 05:07:33,167 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 600 transitions. Word has length 19 [2021-06-05 05:07:33,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:33,167 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 600 transitions. [2021-06-05 05:07:33,167 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) [2021-06-05 05:07:33,167 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 600 transitions. [2021-06-05 05:07:33,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:33,168 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:33,168 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:33,368 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16301 [2021-06-05 05:07:33,368 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:33,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:33,368 INFO L82 PathProgramCache]: Analyzing trace with hash -2146411765, now seen corresponding path program 614 times [2021-06-05 05:07:33,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:33,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879134174] [2021-06-05 05:07:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:33,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:33,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:33,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879134174] [2021-06-05 05:07:33,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879134174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:33,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247666696] [2021-06-05 05:07:33,455 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 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 [2021-06-05 05:07:33,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:33,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:33,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:33,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:33,788 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:33,788 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:33,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:33,791 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 15 treesize of output 11 [2021-06-05 05:07:33,792 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:33,827 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:07:33,827 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:33,829 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 [2021-06-05 05:07:33,830 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:33,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:33,843 INFO L518 ElimStorePlain]: Eliminatee v_prenex_662 vanished before elimination [2021-06-05 05:07:33,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:33,844 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:07:33,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:33,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247666696] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:33,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:33,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:33,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073131329] [2021-06-05 05:07:33,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:33,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:33,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:33,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:33,873 INFO L87 Difference]: Start difference. First operand 246 states and 600 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) [2021-06-05 05:07:34,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:34,189 INFO L93 Difference]: Finished difference Result 278 states and 649 transitions. [2021-06-05 05:07:34,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:34,190 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 [2021-06-05 05:07:34,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:34,190 INFO L225 Difference]: With dead ends: 278 [2021-06-05 05:07:34,190 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 05:07:34,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 463.4ms TimeCoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:07:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 05:07:34,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 245. [2021-06-05 05:07:34,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 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) [2021-06-05 05:07:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-06-05 05:07:34,193 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-06-05 05:07:34,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:34,193 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-06-05 05:07:34,193 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) [2021-06-05 05:07:34,193 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-06-05 05:07:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:34,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:34,193 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:34,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16305,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:34,393 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:34,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:34,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1186810156, now seen corresponding path program 615 times [2021-06-05 05:07:34,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:34,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520757161] [2021-06-05 05:07:34,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:34,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:34,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520757161] [2021-06-05 05:07:34,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520757161] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:34,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969845301] [2021-06-05 05:07:34,479 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 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 [2021-06-05 05:07:34,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:07:34,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:34,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:34,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:34,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:34,675 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 16 treesize of output 12 [2021-06-05 05:07:34,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:34,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:34,678 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 15 treesize of output 11 [2021-06-05 05:07:34,678 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:34,699 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:07:34,699 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:34,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:34,700 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:07:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:34,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969845301] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:34,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:34,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:34,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781649690] [2021-06-05 05:07:34,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:34,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:34,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:34,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:34,724 INFO L87 Difference]: Start difference. First operand 245 states and 597 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) [2021-06-05 05:07:35,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:35,212 INFO L93 Difference]: Finished difference Result 304 states and 709 transitions. [2021-06-05 05:07:35,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:35,212 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 [2021-06-05 05:07:35,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:35,212 INFO L225 Difference]: With dead ends: 304 [2021-06-05 05:07:35,213 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 05:07:35,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 476.0ms TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:07:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 05:07:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 245. [2021-06-05 05:07:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.44672131147541) internal successors, (597), 244 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) [2021-06-05 05:07:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 597 transitions. [2021-06-05 05:07:35,215 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 597 transitions. Word has length 19 [2021-06-05 05:07:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:35,215 INFO L482 AbstractCegarLoop]: Abstraction has 245 states and 597 transitions. [2021-06-05 05:07:35,215 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) [2021-06-05 05:07:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 597 transitions. [2021-06-05 05:07:35,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:35,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:35,215 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:35,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16321 [2021-06-05 05:07:35,416 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:35,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:35,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1135862999, now seen corresponding path program 616 times [2021-06-05 05:07:35,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:35,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722895698] [2021-06-05 05:07:35,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:35,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:35,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722895698] [2021-06-05 05:07:35,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722895698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:35,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255975547] [2021-06-05 05:07:35,513 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 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 [2021-06-05 05:07:35,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:35,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:35,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:35,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:35,814 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:35,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:35,818 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 15 treesize of output 11 [2021-06-05 05:07:35,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,853 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:07:35,854 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:35,856 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 [2021-06-05 05:07:35,857 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:35,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:35,870 INFO L518 ElimStorePlain]: Eliminatee v_prenex_666 vanished before elimination [2021-06-05 05:07:35,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:35,871 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:07:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:35,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255975547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:35,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:35,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:35,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260157769] [2021-06-05 05:07:35,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:35,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:35,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:35,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:35,901 INFO L87 Difference]: Start difference. First operand 245 states and 597 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) [2021-06-05 05:07:36,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:36,259 INFO L93 Difference]: Finished difference Result 272 states and 639 transitions. [2021-06-05 05:07:36,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:36,259 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 [2021-06-05 05:07:36,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:36,259 INFO L225 Difference]: With dead ends: 272 [2021-06-05 05:07:36,259 INFO L226 Difference]: Without dead ends: 266 [2021-06-05 05:07:36,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 411.6ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:07:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-06-05 05:07:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 243. [2021-06-05 05:07:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 2.4421487603305785) internal successors, (591), 242 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 591 transitions. [2021-06-05 05:07:36,262 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 591 transitions. Word has length 19 [2021-06-05 05:07:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:36,262 INFO L482 AbstractCegarLoop]: Abstraction has 243 states and 591 transitions. [2021-06-05 05:07:36,262 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) [2021-06-05 05:07:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 591 transitions. [2021-06-05 05:07:36,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:36,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:36,262 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:36,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16325,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:36,462 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:36,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:36,463 INFO L82 PathProgramCache]: Analyzing trace with hash -146574358, now seen corresponding path program 617 times [2021-06-05 05:07:36,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:36,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929846779] [2021-06-05 05:07:36,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:36,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:36,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:36,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929846779] [2021-06-05 05:07:36,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929846779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:36,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026843788] [2021-06-05 05:07:36,547 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 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 [2021-06-05 05:07:36,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:07:36,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:36,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:36,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:36,746 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 [2021-06-05 05:07:36,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:36,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:36,749 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 [2021-06-05 05:07:36,750 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:36,771 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:07:36,771 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:36,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:36,772 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:07:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:36,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026843788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:36,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:36,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:36,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98881145] [2021-06-05 05:07:36,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:36,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:36,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:36,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:36,796 INFO L87 Difference]: Start difference. First operand 243 states and 591 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) [2021-06-05 05:07:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:37,060 INFO L93 Difference]: Finished difference Result 292 states and 682 transitions. [2021-06-05 05:07:37,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:37,060 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 [2021-06-05 05:07:37,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:37,060 INFO L225 Difference]: With dead ends: 292 [2021-06-05 05:07:37,060 INFO L226 Difference]: Without dead ends: 292 [2021-06-05 05:07:37,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:07:37,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-06-05 05:07:37,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 239. [2021-06-05 05:07:37,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 2.4285714285714284) internal successors, (578), 238 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:37,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 578 transitions. [2021-06-05 05:07:37,063 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 578 transitions. Word has length 19 [2021-06-05 05:07:37,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:37,063 INFO L482 AbstractCegarLoop]: Abstraction has 239 states and 578 transitions. [2021-06-05 05:07:37,063 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) [2021-06-05 05:07:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 578 transitions. [2021-06-05 05:07:37,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:37,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:37,063 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:37,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 621 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16342 [2021-06-05 05:07:37,264 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash -192834421, now seen corresponding path program 618 times [2021-06-05 05:07:37,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:37,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701060860] [2021-06-05 05:07:37,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:37,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:37,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:37,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701060860] [2021-06-05 05:07:37,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701060860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:37,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986068569] [2021-06-05 05:07:37,361 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 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 [2021-06-05 05:07:37,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:07:37,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:37,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:37,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:37,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:37,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:37,724 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 15 treesize of output 11 [2021-06-05 05:07:37,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:37,727 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:37,728 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:37,762 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:07:37,763 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:37,765 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 [2021-06-05 05:07:37,766 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:37,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:37,779 INFO L518 ElimStorePlain]: Eliminatee v_prenex_672 vanished before elimination [2021-06-05 05:07:37,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:37,780 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:07:37,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:37,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986068569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:37,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:37,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-06-05 05:07:37,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697532793] [2021-06-05 05:07:37,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:07:37,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:37,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:07:37,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:07:37,810 INFO L87 Difference]: Start difference. First operand 239 states and 578 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) [2021-06-05 05:07:38,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:38,078 INFO L93 Difference]: Finished difference Result 262 states and 612 transitions. [2021-06-05 05:07:38,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:07:38,079 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 [2021-06-05 05:07:38,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:38,079 INFO L225 Difference]: With dead ends: 262 [2021-06-05 05:07:38,079 INFO L226 Difference]: Without dead ends: 246 [2021-06-05 05:07:38,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 402.5ms TimeCoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:07:38,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-06-05 05:07:38,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 229. [2021-06-05 05:07:38,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.43859649122807) internal successors, (556), 228 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) [2021-06-05 05:07:38,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 556 transitions. [2021-06-05 05:07:38,081 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 556 transitions. Word has length 19 [2021-06-05 05:07:38,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:38,081 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 556 transitions. [2021-06-05 05:07:38,081 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) [2021-06-05 05:07:38,081 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 556 transitions. [2021-06-05 05:07:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:38,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:38,082 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:38,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 622 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16346 [2021-06-05 05:07:38,282 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:38,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:38,282 INFO L82 PathProgramCache]: Analyzing trace with hash -2076858112, now seen corresponding path program 619 times [2021-06-05 05:07:38,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:38,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26035937] [2021-06-05 05:07:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:38,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:38,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26035937] [2021-06-05 05:07:38,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26035937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:38,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886836450] [2021-06-05 05:07:38,362 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 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 [2021-06-05 05:07:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:38,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:38,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:38,537 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 [2021-06-05 05:07:38,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:38,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:38,540 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 16 treesize of output 12 [2021-06-05 05:07:38,541 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:38,543 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 [2021-06-05 05:07:38,544 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:38,578 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:07:38,578 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:38,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:38,579 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:07:38,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:38,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886836450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:38,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:38,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:38,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049871445] [2021-06-05 05:07:38,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:38,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:38,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:38,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:38,608 INFO L87 Difference]: Start difference. First operand 229 states and 556 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) [2021-06-05 05:07:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:39,006 INFO L93 Difference]: Finished difference Result 360 states and 780 transitions. [2021-06-05 05:07:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:07:39,006 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 [2021-06-05 05:07:39,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:39,006 INFO L225 Difference]: With dead ends: 360 [2021-06-05 05:07:39,006 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 05:07:39,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 371.1ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:07:39,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 05:07:39,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 229. [2021-06-05 05:07:39,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.4342105263157894) internal successors, (555), 228 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:39,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 555 transitions. [2021-06-05 05:07:39,014 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 555 transitions. Word has length 19 [2021-06-05 05:07:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:39,014 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 555 transitions. [2021-06-05 05:07:39,014 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) [2021-06-05 05:07:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 555 transitions. [2021-06-05 05:07:39,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:39,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:39,015 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:39,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16372 [2021-06-05 05:07:39,215 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:39,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:39,216 INFO L82 PathProgramCache]: Analyzing trace with hash -545931905, now seen corresponding path program 620 times [2021-06-05 05:07:39,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:39,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311406067] [2021-06-05 05:07:39,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:39,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:39,296 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:39,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:39,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311406067] [2021-06-05 05:07:39,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311406067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:39,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561883990] [2021-06-05 05:07:39,297 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 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 [2021-06-05 05:07:39,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:39,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:39,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:39,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:39,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:39,445 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 16 treesize of output 12 [2021-06-05 05:07:39,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:39,447 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:39,447 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 15 treesize of output 11 [2021-06-05 05:07:39,448 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:39,469 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:07:39,469 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:39,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:39,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:07:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:39,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561883990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:39,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:39,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:39,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371296911] [2021-06-05 05:07:39,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:39,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:39,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:39,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:39,491 INFO L87 Difference]: Start difference. First operand 229 states and 555 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) [2021-06-05 05:07:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:39,920 INFO L93 Difference]: Finished difference Result 447 states and 963 transitions. [2021-06-05 05:07:39,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:07:39,920 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 [2021-06-05 05:07:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:39,921 INFO L225 Difference]: With dead ends: 447 [2021-06-05 05:07:39,921 INFO L226 Difference]: Without dead ends: 447 [2021-06-05 05:07:39,921 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 285.0ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:07:39,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-06-05 05:07:39,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 237. [2021-06-05 05:07:39,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.4364406779661016) internal successors, (575), 236 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:39,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 575 transitions. [2021-06-05 05:07:39,924 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 575 transitions. Word has length 19 [2021-06-05 05:07:39,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:39,924 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 575 transitions. [2021-06-05 05:07:39,924 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) [2021-06-05 05:07:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 575 transitions. [2021-06-05 05:07:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:39,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:39,924 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:40,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16385 [2021-06-05 05:07:40,125 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash -940754108, now seen corresponding path program 621 times [2021-06-05 05:07:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:40,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976508060] [2021-06-05 05:07:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:40,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:40,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976508060] [2021-06-05 05:07:40,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976508060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:40,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262953998] [2021-06-05 05:07:40,203 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 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 [2021-06-05 05:07:40,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:07:40,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:40,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:40,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:40,383 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 [2021-06-05 05:07:40,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:40,386 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 [2021-06-05 05:07:40,387 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:40,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:40,389 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 [2021-06-05 05:07:40,390 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:40,423 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:07:40,424 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:40,424 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:40,424 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:07:40,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:40,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262953998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:40,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:40,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:40,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930159046] [2021-06-05 05:07:40,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:40,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:40,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:40,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:40,456 INFO L87 Difference]: Start difference. First operand 237 states and 575 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) [2021-06-05 05:07:41,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:41,105 INFO L93 Difference]: Finished difference Result 385 states and 825 transitions. [2021-06-05 05:07:41,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:07:41,105 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 [2021-06-05 05:07:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:41,106 INFO L225 Difference]: With dead ends: 385 [2021-06-05 05:07:41,106 INFO L226 Difference]: Without dead ends: 370 [2021-06-05 05:07:41,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 571.9ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:07:41,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-06-05 05:07:41,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 235. [2021-06-05 05:07:41,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.427350427350427) internal successors, (568), 234 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 568 transitions. [2021-06-05 05:07:41,108 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 568 transitions. Word has length 19 [2021-06-05 05:07:41,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:41,108 INFO L482 AbstractCegarLoop]: Abstraction has 235 states and 568 transitions. [2021-06-05 05:07:41,108 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) [2021-06-05 05:07:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 568 transitions. [2021-06-05 05:07:41,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:41,109 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:41,109 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:41,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16389 [2021-06-05 05:07:41,309 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:41,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:41,309 INFO L82 PathProgramCache]: Analyzing trace with hash -198632731, now seen corresponding path program 622 times [2021-06-05 05:07:41,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:41,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182753030] [2021-06-05 05:07:41,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:41,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:41,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:41,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:41,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182753030] [2021-06-05 05:07:41,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182753030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:41,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572538417] [2021-06-05 05:07:41,398 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 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 [2021-06-05 05:07:41,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:41,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,546 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 16 treesize of output 12 [2021-06-05 05:07:41,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:41,549 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 [2021-06-05 05:07:41,549 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,570 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:07:41,570 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:41,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:41,571 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:07:41,592 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:41,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572538417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:41,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:41,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:41,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099953085] [2021-06-05 05:07:41,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:41,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:41,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:41,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:41,593 INFO L87 Difference]: Start difference. First operand 235 states and 568 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) [2021-06-05 05:07:42,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:42,131 INFO L93 Difference]: Finished difference Result 494 states and 1060 transitions. [2021-06-05 05:07:42,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:07:42,131 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 [2021-06-05 05:07:42,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:42,132 INFO L225 Difference]: With dead ends: 494 [2021-06-05 05:07:42,132 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 05:07:42,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=127, Invalid=803, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:07:42,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 05:07:42,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 225. [2021-06-05 05:07:42,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.4375) internal successors, (546), 224 states have internal predecessors, (546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 546 transitions. [2021-06-05 05:07:42,134 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 546 transitions. Word has length 19 [2021-06-05 05:07:42,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:42,134 INFO L482 AbstractCegarLoop]: Abstraction has 225 states and 546 transitions. [2021-06-05 05:07:42,134 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) [2021-06-05 05:07:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 546 transitions. [2021-06-05 05:07:42,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:42,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:42,135 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:42,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16404,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:42,335 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:42,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:42,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1181200256, now seen corresponding path program 623 times [2021-06-05 05:07:42,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:42,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715834174] [2021-06-05 05:07:42,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:42,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:42,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:42,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715834174] [2021-06-05 05:07:42,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715834174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:42,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349346999] [2021-06-05 05:07:42,412 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 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 [2021-06-05 05:07:42,440 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:07:42,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:42,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:42,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:42,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,585 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,586 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 [2021-06-05 05:07:42,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:42,589 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 [2021-06-05 05:07:42,590 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:42,618 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:07:42,618 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:42,618 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:42,618 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:07:42,668 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:42,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349346999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:42,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:42,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:42,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53665809] [2021-06-05 05:07:42,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:42,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:42,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:42,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:42,669 INFO L87 Difference]: Start difference. First operand 225 states and 546 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) [2021-06-05 05:07:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:43,691 INFO L93 Difference]: Finished difference Result 449 states and 929 transitions. [2021-06-05 05:07:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:07:43,692 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 [2021-06-05 05:07:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:43,692 INFO L225 Difference]: With dead ends: 449 [2021-06-05 05:07:43,692 INFO L226 Difference]: Without dead ends: 440 [2021-06-05 05:07:43,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 873.3ms TimeCoverageRelationStatistics Valid=236, Invalid=1656, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:07:43,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-06-05 05:07:43,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 229. [2021-06-05 05:07:43,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:43,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-06-05 05:07:43,695 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-06-05 05:07:43,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:43,695 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-06-05 05:07:43,695 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) [2021-06-05 05:07:43,695 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-06-05 05:07:43,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:43,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:43,695 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:43,895 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16408,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:43,896 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:43,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1434355521, now seen corresponding path program 624 times [2021-06-05 05:07:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:43,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68895407] [2021-06-05 05:07:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:43,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:43,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:43,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68895407] [2021-06-05 05:07:43,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68895407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:43,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847867470] [2021-06-05 05:07:43,979 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 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 [2021-06-05 05:07:44,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:07:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:44,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:44,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:44,110 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:44,111 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 15 treesize of output 11 [2021-06-05 05:07:44,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:44,114 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,116 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 [2021-06-05 05:07:44,117 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:44,119 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 16 treesize of output 12 [2021-06-05 05:07:44,119 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:44,151 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:07:44,151 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:44,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:44,152 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:07:44,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:44,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847867470] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:44,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:44,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:44,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233135028] [2021-06-05 05:07:44,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:44,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:44,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:44,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:44,196 INFO L87 Difference]: Start difference. First operand 229 states and 560 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) [2021-06-05 05:07:45,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:45,104 INFO L93 Difference]: Finished difference Result 584 states and 1209 transitions. [2021-06-05 05:07:45,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:07:45,104 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 [2021-06-05 05:07:45,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:45,105 INFO L225 Difference]: With dead ends: 584 [2021-06-05 05:07:45,105 INFO L226 Difference]: Without dead ends: 578 [2021-06-05 05:07:45,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 793.5ms TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:07:45,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-06-05 05:07:45,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 229. [2021-06-05 05:07:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.456140350877193) internal successors, (560), 228 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 560 transitions. [2021-06-05 05:07:45,107 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 560 transitions. Word has length 19 [2021-06-05 05:07:45,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:45,108 INFO L482 AbstractCegarLoop]: Abstraction has 229 states and 560 transitions. [2021-06-05 05:07:45,108 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) [2021-06-05 05:07:45,108 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 560 transitions. [2021-06-05 05:07:45,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:45,108 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:45,108 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:45,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16426,628 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:45,308 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1881693244, now seen corresponding path program 625 times [2021-06-05 05:07:45,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:45,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188101793] [2021-06-05 05:07:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:45,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:45,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188101793] [2021-06-05 05:07:45,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188101793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:45,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384191813] [2021-06-05 05:07:45,384 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 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 [2021-06-05 05:07:45,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:45,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:45,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:45,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:45,540 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 16 treesize of output 12 [2021-06-05 05:07:45,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:45,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:45,543 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 15 treesize of output 11 [2021-06-05 05:07:45,544 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:45,572 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:07:45,572 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:45,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:45,573 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:07:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:45,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384191813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:45,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:45,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:45,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440986569] [2021-06-05 05:07:45,616 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:45,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:45,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:45,617 INFO L87 Difference]: Start difference. First operand 229 states and 560 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) [2021-06-05 05:07:46,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:46,180 INFO L93 Difference]: Finished difference Result 382 states and 836 transitions. [2021-06-05 05:07:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:07:46,180 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 [2021-06-05 05:07:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:46,180 INFO L225 Difference]: With dead ends: 382 [2021-06-05 05:07:46,181 INFO L226 Difference]: Without dead ends: 382 [2021-06-05 05:07:46,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 485.3ms TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:07:46,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-06-05 05:07:46,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 227. [2021-06-05 05:07:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4424778761061945) internal successors, (552), 226 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:46,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 552 transitions. [2021-06-05 05:07:46,183 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 552 transitions. Word has length 19 [2021-06-05 05:07:46,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:46,183 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 552 transitions. [2021-06-05 05:07:46,183 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) [2021-06-05 05:07:46,183 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 552 transitions. [2021-06-05 05:07:46,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:46,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:46,183 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:46,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16436,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:46,384 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:46,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:46,384 INFO L82 PathProgramCache]: Analyzing trace with hash 430476807, now seen corresponding path program 626 times [2021-06-05 05:07:46,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:46,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491008283] [2021-06-05 05:07:46,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:46,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:46,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491008283] [2021-06-05 05:07:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491008283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:46,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230377376] [2021-06-05 05:07:46,459 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 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 [2021-06-05 05:07:46,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:46,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:46,590 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 [2021-06-05 05:07:46,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:46,593 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 [2021-06-05 05:07:46,593 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:46,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:46,596 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 15 treesize of output 11 [2021-06-05 05:07:46,597 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:46,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:46,599 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 16 treesize of output 12 [2021-06-05 05:07:46,600 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:46,634 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:07:46,634 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:46,635 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:46,635 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:07:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:46,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230377376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:46,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:46,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:07:46,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655273164] [2021-06-05 05:07:46,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:07:46,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:46,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:07:46,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:07:46,699 INFO L87 Difference]: Start difference. First operand 227 states and 552 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) [2021-06-05 05:07:48,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:48,020 INFO L93 Difference]: Finished difference Result 519 states and 1080 transitions. [2021-06-05 05:07:48,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:07:48,020 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 [2021-06-05 05:07:48,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:48,020 INFO L225 Difference]: With dead ends: 519 [2021-06-05 05:07:48,021 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 05:07:48,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1164.8ms TimeCoverageRelationStatistics Valid=330, Invalid=2532, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:07:48,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 05:07:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 222. [2021-06-05 05:07:48,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.4434389140271495) internal successors, (540), 221 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) [2021-06-05 05:07:48,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 540 transitions. [2021-06-05 05:07:48,023 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 540 transitions. Word has length 19 [2021-06-05 05:07:48,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:48,023 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 540 transitions. [2021-06-05 05:07:48,023 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) [2021-06-05 05:07:48,024 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 540 transitions. [2021-06-05 05:07:48,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:48,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:48,024 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:48,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16446,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:48,224 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:48,224 INFO L82 PathProgramCache]: Analyzing trace with hash 446780864, now seen corresponding path program 627 times [2021-06-05 05:07:48,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:48,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907896001] [2021-06-05 05:07:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:48,290 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:48,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:48,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907896001] [2021-06-05 05:07:48,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907896001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:48,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660267929] [2021-06-05 05:07:48,290 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 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 [2021-06-05 05:07:48,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:07:48,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:48,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:48,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:48,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:48,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:48,435 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 [2021-06-05 05:07:48,436 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:48,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:48,438 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 [2021-06-05 05:07:48,439 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:48,464 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:48,464 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:48,465 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:48,465 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:48,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660267929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:48,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:48,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:48,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729211232] [2021-06-05 05:07:48,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:48,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:48,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:48,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:48,514 INFO L87 Difference]: Start difference. First operand 222 states and 540 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) [2021-06-05 05:07:49,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:49,672 INFO L93 Difference]: Finished difference Result 523 states and 1059 transitions. [2021-06-05 05:07:49,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:07:49,673 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 [2021-06-05 05:07:49,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:49,673 INFO L225 Difference]: With dead ends: 523 [2021-06-05 05:07:49,673 INFO L226 Difference]: Without dead ends: 517 [2021-06-05 05:07:49,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1044.9ms TimeCoverageRelationStatistics Valid=332, Invalid=2118, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:07:49,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-06-05 05:07:49,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 227. [2021-06-05 05:07:49,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.4646017699115044) internal successors, (557), 226 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:49,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 557 transitions. [2021-06-05 05:07:49,676 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 557 transitions. Word has length 19 [2021-06-05 05:07:49,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:49,676 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 557 transitions. [2021-06-05 05:07:49,676 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) [2021-06-05 05:07:49,676 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 557 transitions. [2021-06-05 05:07:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:49,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:49,676 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:49,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16459 [2021-06-05 05:07:49,877 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:49,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:49,877 INFO L82 PathProgramCache]: Analyzing trace with hash 193625599, now seen corresponding path program 628 times [2021-06-05 05:07:49,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:49,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147887015] [2021-06-05 05:07:49,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:49,942 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:49,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:49,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147887015] [2021-06-05 05:07:49,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147887015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:49,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074777177] [2021-06-05 05:07:49,942 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 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 [2021-06-05 05:07:49,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:49,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:49,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:49,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:50,118 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 [2021-06-05 05:07:50,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:50,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:50,121 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 15 treesize of output 11 [2021-06-05 05:07:50,122 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:50,161 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:07:50,162 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:50,163 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 [2021-06-05 05:07:50,164 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:50,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:50,178 INFO L518 ElimStorePlain]: Eliminatee v_prenex_674 vanished before elimination [2021-06-05 05:07:50,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:50,179 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:50,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074777177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:50,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:50,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:50,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755147284] [2021-06-05 05:07:50,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:50,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:50,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:50,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:50,232 INFO L87 Difference]: Start difference. First operand 227 states and 557 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) [2021-06-05 05:07:50,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:50,742 INFO L93 Difference]: Finished difference Result 384 states and 813 transitions. [2021-06-05 05:07:50,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:07:50,743 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 [2021-06-05 05:07:50,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:50,743 INFO L225 Difference]: With dead ends: 384 [2021-06-05 05:07:50,743 INFO L226 Difference]: Without dead ends: 372 [2021-06-05 05:07:50,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 479.1ms TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:07:50,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-06-05 05:07:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 221. [2021-06-05 05:07:50,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 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) [2021-06-05 05:07:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 05:07:50,746 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 05:07:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:50,746 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 05:07:50,746 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) [2021-06-05 05:07:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 05:07:50,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:50,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:50,746 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:50,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16469,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:50,946 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:50,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:50,947 INFO L82 PathProgramCache]: Analyzing trace with hash -253712124, now seen corresponding path program 629 times [2021-06-05 05:07:50,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:50,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336399212] [2021-06-05 05:07:50,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:51,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:51,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336399212] [2021-06-05 05:07:51,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336399212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:51,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910886631] [2021-06-05 05:07:51,013 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 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 [2021-06-05 05:07:51,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:07:51,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:51,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:51,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:51,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,161 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,162 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 16 treesize of output 12 [2021-06-05 05:07:51,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:51,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:51,164 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 15 treesize of output 11 [2021-06-05 05:07:51,165 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:51,190 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:51,190 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:51,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:51,191 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:51,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910886631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:51,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:51,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:51,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213941710] [2021-06-05 05:07:51,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:51,232 INFO L87 Difference]: Start difference. First operand 221 states and 537 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) [2021-06-05 05:07:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:51,800 INFO L93 Difference]: Finished difference Result 423 states and 911 transitions. [2021-06-05 05:07:51,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:07:51,801 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 19 [2021-06-05 05:07:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:51,801 INFO L225 Difference]: With dead ends: 423 [2021-06-05 05:07:51,801 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 05:07:51,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=147, Invalid=845, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:07:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 05:07:51,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 216. [2021-06-05 05:07:51,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4046511627906977) internal successors, (517), 215 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) [2021-06-05 05:07:51,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 517 transitions. [2021-06-05 05:07:51,803 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 517 transitions. Word has length 19 [2021-06-05 05:07:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:51,803 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 517 transitions. [2021-06-05 05:07:51,804 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) [2021-06-05 05:07:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 517 transitions. [2021-06-05 05:07:51,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:51,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:51,804 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:52,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16486 [2021-06-05 05:07:52,004 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:52,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:52,005 INFO L82 PathProgramCache]: Analyzing trace with hash 2058457927, now seen corresponding path program 630 times [2021-06-05 05:07:52,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:52,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176163803] [2021-06-05 05:07:52,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:52,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176163803] [2021-06-05 05:07:52,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176163803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:52,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754830829] [2021-06-05 05:07:52,070 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 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 [2021-06-05 05:07:52,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:07:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:52,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:52,244 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 [2021-06-05 05:07:52,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:52,248 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 15 treesize of output 11 [2021-06-05 05:07:52,249 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,288 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:07:52,288 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:52,290 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 [2021-06-05 05:07:52,291 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:52,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:52,305 INFO L518 ElimStorePlain]: Eliminatee v_prenex_678 vanished before elimination [2021-06-05 05:07:52,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:52,306 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:52,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:52,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754830829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:52,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:52,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:52,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126296633] [2021-06-05 05:07:52,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:52,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:52,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:52,378 INFO L87 Difference]: Start difference. First operand 216 states and 517 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) [2021-06-05 05:07:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:53,250 INFO L93 Difference]: Finished difference Result 346 states and 741 transitions. [2021-06-05 05:07:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:07:53,250 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 19 [2021-06-05 05:07:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:53,250 INFO L225 Difference]: With dead ends: 346 [2021-06-05 05:07:53,250 INFO L226 Difference]: Without dead ends: 342 [2021-06-05 05:07:53,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=200, Invalid=1360, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:07:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-06-05 05:07:53,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 214. [2021-06-05 05:07:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 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) [2021-06-05 05:07:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-06-05 05:07:53,253 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-06-05 05:07:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:53,253 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-06-05 05:07:53,253 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) [2021-06-05 05:07:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-06-05 05:07:53,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:53,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:53,253 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:53,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16494,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:53,454 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:53,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:53,454 INFO L82 PathProgramCache]: Analyzing trace with hash -788941926, now seen corresponding path program 631 times [2021-06-05 05:07:53,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:53,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636445971] [2021-06-05 05:07:53,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:53,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:53,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636445971] [2021-06-05 05:07:53,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636445971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:53,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557788856] [2021-06-05 05:07:53,524 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 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 [2021-06-05 05:07:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:53,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:53,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:53,678 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:53,678 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 [2021-06-05 05:07:53,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:53,681 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:53,681 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 [2021-06-05 05:07:53,682 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:53,703 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:07:53,703 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:53,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:07:53,704 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:07:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:53,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557788856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:53,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:53,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:53,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869259946] [2021-06-05 05:07:53,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:53,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:53,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:53,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:53,726 INFO L87 Difference]: Start difference. First operand 214 states and 511 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) [2021-06-05 05:07:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:54,084 INFO L93 Difference]: Finished difference Result 344 states and 758 transitions. [2021-06-05 05:07:54,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:07:54,084 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 19 [2021-06-05 05:07:54,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:54,085 INFO L225 Difference]: With dead ends: 344 [2021-06-05 05:07:54,085 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 05:07:54,085 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:07:54,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 05:07:54,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 210. [2021-06-05 05:07:54,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 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) [2021-06-05 05:07:54,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 05:07:54,087 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 05:07:54,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:54,087 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 05:07:54,087 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) [2021-06-05 05:07:54,087 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 05:07:54,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:54,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:54,087 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:54,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16514,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:54,288 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:54,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:54,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1160798213, now seen corresponding path program 632 times [2021-06-05 05:07:54,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:54,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78974178] [2021-06-05 05:07:54,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:54,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:54,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78974178] [2021-06-05 05:07:54,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78974178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:54,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520800497] [2021-06-05 05:07:54,360 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 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 [2021-06-05 05:07:54,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:07:54,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:54,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:54,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:54,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:54,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:54,602 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 15 treesize of output 11 [2021-06-05 05:07:54,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,605 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:07:54,606 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,641 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:07:54,641 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:54,643 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 [2021-06-05 05:07:54,644 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:54,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:54,657 INFO L518 ElimStorePlain]: Eliminatee v_prenex_681 vanished before elimination [2021-06-05 05:07:54,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:07:54,658 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:07:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:54,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520800497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:54,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:54,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:54,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484857326] [2021-06-05 05:07:54,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:54,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:54,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:54,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:54,686 INFO L87 Difference]: Start difference. First operand 210 states and 497 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) [2021-06-05 05:07:55,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:55,104 INFO L93 Difference]: Finished difference Result 270 states and 610 transitions. [2021-06-05 05:07:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:07:55,105 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 19 [2021-06-05 05:07:55,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:55,105 INFO L225 Difference]: With dead ends: 270 [2021-06-05 05:07:55,105 INFO L226 Difference]: Without dead ends: 262 [2021-06-05 05:07:55,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 430.7ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:07:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-06-05 05:07:55,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 208. [2021-06-05 05:07:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.3719806763285023) internal successors, (491), 207 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) [2021-06-05 05:07:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 491 transitions. [2021-06-05 05:07:55,107 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 491 transitions. Word has length 19 [2021-06-05 05:07:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:55,107 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 491 transitions. [2021-06-05 05:07:55,107 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) [2021-06-05 05:07:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 491 transitions. [2021-06-05 05:07:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:55,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:55,107 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:55,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16518 [2021-06-05 05:07:55,308 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:55,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:55,308 INFO L82 PathProgramCache]: Analyzing trace with hash -625411968, now seen corresponding path program 633 times [2021-06-05 05:07:55,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:55,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94600130] [2021-06-05 05:07:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:55,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:55,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94600130] [2021-06-05 05:07:55,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94600130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:55,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348539720] [2021-06-05 05:07:55,375 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 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 [2021-06-05 05:07:55,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:07:55,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:55,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:55,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:55,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:55,530 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:55,530 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 15 treesize of output 11 [2021-06-05 05:07:55,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:55,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:55,533 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 16 treesize of output 12 [2021-06-05 05:07:55,534 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:55,558 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:55,559 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:55,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:55,559 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:55,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348539720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:55,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:55,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:55,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056831463] [2021-06-05 05:07:55,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:55,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:55,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:55,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:55,609 INFO L87 Difference]: Start difference. First operand 208 states and 491 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) [2021-06-05 05:07:56,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:56,646 INFO L93 Difference]: Finished difference Result 417 states and 905 transitions. [2021-06-05 05:07:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:07:56,646 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 [2021-06-05 05:07:56,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:56,647 INFO L225 Difference]: With dead ends: 417 [2021-06-05 05:07:56,647 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 05:07:56,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 941.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:07:56,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 05:07:56,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 217. [2021-06-05 05:07:56,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:56,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-06-05 05:07:56,649 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-06-05 05:07:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:56,649 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-06-05 05:07:56,650 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) [2021-06-05 05:07:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-06-05 05:07:56,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:56,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:56,650 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:56,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16545,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:56,850 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:56,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:56,850 INFO L82 PathProgramCache]: Analyzing trace with hash -878567233, now seen corresponding path program 634 times [2021-06-05 05:07:56,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:56,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233769833] [2021-06-05 05:07:56,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:56,918 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:56,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:56,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233769833] [2021-06-05 05:07:56,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233769833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:56,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524495503] [2021-06-05 05:07:56,918 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 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 [2021-06-05 05:07:56,945 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:07:56,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:56,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:57,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:57,113 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 16 treesize of output 12 [2021-06-05 05:07:57,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:57,116 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 [2021-06-05 05:07:57,117 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:57,157 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:07:57,157 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:57,161 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 [2021-06-05 05:07:57,163 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:57,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:57,182 INFO L518 ElimStorePlain]: Eliminatee v_prenex_685 vanished before elimination [2021-06-05 05:07:57,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:57,183 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:57,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524495503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:57,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:57,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:57,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37307375] [2021-06-05 05:07:57,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:57,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:57,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:57,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:57,237 INFO L87 Difference]: Start difference. First operand 217 states and 522 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) [2021-06-05 05:07:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:57,711 INFO L93 Difference]: Finished difference Result 345 states and 755 transitions. [2021-06-05 05:07:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:07:57,711 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 [2021-06-05 05:07:57,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:57,712 INFO L225 Difference]: With dead ends: 345 [2021-06-05 05:07:57,712 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 05:07:57,712 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 411.7ms TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:07:57,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 05:07:57,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 217. [2021-06-05 05:07:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.4166666666666665) internal successors, (522), 216 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:57,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 522 transitions. [2021-06-05 05:07:57,714 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 522 transitions. Word has length 19 [2021-06-05 05:07:57,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:57,714 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 522 transitions. [2021-06-05 05:07:57,714 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) [2021-06-05 05:07:57,714 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 522 transitions. [2021-06-05 05:07:57,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:57,714 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:57,714 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:57,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 638 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16555 [2021-06-05 05:07:57,915 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:57,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:57,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1325904956, now seen corresponding path program 635 times [2021-06-05 05:07:57,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:57,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114170328] [2021-06-05 05:07:57,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:57,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:57,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114170328] [2021-06-05 05:07:57,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114170328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:57,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962662478] [2021-06-05 05:07:57,984 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 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 [2021-06-05 05:07:58,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:07:58,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:58,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:58,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:58,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:58,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:58,142 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 [2021-06-05 05:07:58,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:58,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:58,145 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 15 treesize of output 11 [2021-06-05 05:07:58,146 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:58,171 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:07:58,171 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:58,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:58,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:07:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:58,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962662478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:58,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:58,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986518466] [2021-06-05 05:07:58,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:58,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:58,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:58,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:58,215 INFO L87 Difference]: Start difference. First operand 217 states and 522 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) [2021-06-05 05:07:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:07:59,012 INFO L93 Difference]: Finished difference Result 448 states and 964 transitions. [2021-06-05 05:07:59,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:07:59,012 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 19 [2021-06-05 05:07:59,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:07:59,012 INFO L225 Difference]: With dead ends: 448 [2021-06-05 05:07:59,012 INFO L226 Difference]: Without dead ends: 448 [2021-06-05 05:07:59,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 736.3ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:07:59,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-06-05 05:07:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 215. [2021-06-05 05:07:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.4018691588785046) internal successors, (514), 214 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:07:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 514 transitions. [2021-06-05 05:07:59,015 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 514 transitions. Word has length 19 [2021-06-05 05:07:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:07:59,015 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 514 transitions. [2021-06-05 05:07:59,015 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) [2021-06-05 05:07:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 514 transitions. [2021-06-05 05:07:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:07:59,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:07:59,015 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:07:59,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16572,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:07:59,216 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:07:59,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:07:59,216 INFO L82 PathProgramCache]: Analyzing trace with hash 986265095, now seen corresponding path program 636 times [2021-06-05 05:07:59,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:07:59,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792220759] [2021-06-05 05:07:59,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:07:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:07:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:59,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:07:59,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792220759] [2021-06-05 05:07:59,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792220759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:59,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150501257] [2021-06-05 05:07:59,283 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 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 [2021-06-05 05:07:59,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:07:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:07:59,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:07:59,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:07:59,471 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 [2021-06-05 05:07:59,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:59,474 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:07:59,474 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 15 treesize of output 11 [2021-06-05 05:07:59,475 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:59,516 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:07:59,516 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:07:59,518 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 [2021-06-05 05:07:59,519 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:07:59,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:07:59,533 INFO L518 ElimStorePlain]: Eliminatee v_prenex_688 vanished before elimination [2021-06-05 05:07:59,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:07:59,534 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:07:59,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:07:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150501257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:07:59,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:07:59,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:07:59,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748349191] [2021-06-05 05:07:59,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:07:59,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:07:59,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:07:59,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:07:59,607 INFO L87 Difference]: Start difference. First operand 215 states and 514 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) [2021-06-05 05:08:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:00,243 INFO L93 Difference]: Finished difference Result 336 states and 733 transitions. [2021-06-05 05:08:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:08:00,243 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 19 [2021-06-05 05:08:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:00,243 INFO L225 Difference]: With dead ends: 336 [2021-06-05 05:08:00,243 INFO L226 Difference]: Without dead ends: 332 [2021-06-05 05:08:00,243 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 567.3ms TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:08:00,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-06-05 05:08:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 214. [2021-06-05 05:08:00,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.39906103286385) internal successors, (511), 213 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) [2021-06-05 05:08:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 511 transitions. [2021-06-05 05:08:00,246 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 511 transitions. Word has length 19 [2021-06-05 05:08:00,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:00,246 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 511 transitions. [2021-06-05 05:08:00,246 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) [2021-06-05 05:08:00,246 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 511 transitions. [2021-06-05 05:08:00,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:00,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:00,246 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:00,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16580 [2021-06-05 05:08:00,446 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:00,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:00,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1861134758, now seen corresponding path program 637 times [2021-06-05 05:08:00,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:00,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006246404] [2021-06-05 05:08:00,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:00,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:00,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:00,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:00,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006246404] [2021-06-05 05:08:00,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006246404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:00,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218252548] [2021-06-05 05:08:00,519 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 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 [2021-06-05 05:08:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:00,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:00,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:00,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:00,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:00,686 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 [2021-06-05 05:08:00,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,688 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:00,689 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 15 treesize of output 11 [2021-06-05 05:08:00,689 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,710 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:00,710 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:00,712 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:00,712 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:00,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:00,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218252548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:00,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:00,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:00,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670390940] [2021-06-05 05:08:00,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:00,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:00,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:00,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:00,735 INFO L87 Difference]: Start difference. First operand 214 states and 511 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) [2021-06-05 05:08:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:01,236 INFO L93 Difference]: Finished difference Result 389 states and 858 transitions. [2021-06-05 05:08:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:08:01,236 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 19 [2021-06-05 05:08:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:01,236 INFO L225 Difference]: With dead ends: 389 [2021-06-05 05:08:01,236 INFO L226 Difference]: Without dead ends: 389 [2021-06-05 05:08:01,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 433.3ms TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:08:01,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-06-05 05:08:01,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 214. [2021-06-05 05:08:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3943661971830985) internal successors, (510), 213 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:01,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 510 transitions. [2021-06-05 05:08:01,239 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 510 transitions. Word has length 19 [2021-06-05 05:08:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:01,239 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 510 transitions. [2021-06-05 05:08:01,239 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) [2021-06-05 05:08:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 510 transitions. [2021-06-05 05:08:01,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:01,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:01,239 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:01,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16594 [2021-06-05 05:08:01,440 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:01,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:01,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2061976251, now seen corresponding path program 638 times [2021-06-05 05:08:01,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:01,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45884759] [2021-06-05 05:08:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:01,512 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45884759] [2021-06-05 05:08:01,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45884759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:01,512 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954867897] [2021-06-05 05:08:01,512 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 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 [2021-06-05 05:08:01,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:01,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:01,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:01,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:01,799 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:01,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:01,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:01,803 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 15 treesize of output 11 [2021-06-05 05:08:01,803 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:01,838 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:01,838 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:01,840 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 [2021-06-05 05:08:01,841 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:01,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:01,853 INFO L518 ElimStorePlain]: Eliminatee v_prenex_694 vanished before elimination [2021-06-05 05:08:01,854 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:01,854 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:01,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954867897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:01,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:01,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:01,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568313143] [2021-06-05 05:08:01,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:01,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:01,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:01,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:01,882 INFO L87 Difference]: Start difference. First operand 214 states and 510 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) [2021-06-05 05:08:02,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:02,233 INFO L93 Difference]: Finished difference Result 278 states and 628 transitions. [2021-06-05 05:08:02,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:08:02,233 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 19 [2021-06-05 05:08:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:02,234 INFO L225 Difference]: With dead ends: 278 [2021-06-05 05:08:02,234 INFO L226 Difference]: Without dead ends: 270 [2021-06-05 05:08:02,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-06-05 05:08:02,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 214. [2021-06-05 05:08:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3896713615023475) internal successors, (509), 213 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) [2021-06-05 05:08:02,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 509 transitions. [2021-06-05 05:08:02,236 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 509 transitions. Word has length 19 [2021-06-05 05:08:02,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:02,236 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 509 transitions. [2021-06-05 05:08:02,236 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) [2021-06-05 05:08:02,236 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 509 transitions. [2021-06-05 05:08:02,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:02,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:02,236 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:02,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16598 [2021-06-05 05:08:02,437 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:02,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:02,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1273389436, now seen corresponding path program 639 times [2021-06-05 05:08:02,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:02,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572427901] [2021-06-05 05:08:02,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:02,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:02,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:02,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572427901] [2021-06-05 05:08:02,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572427901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:02,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380278673] [2021-06-05 05:08:02,506 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 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 [2021-06-05 05:08:02,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:08:02,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:02,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:02,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:02,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:02,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:02,664 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 16 treesize of output 12 [2021-06-05 05:08:02,665 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:02,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:02,667 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 15 treesize of output 11 [2021-06-05 05:08:02,668 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:02,689 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:02,689 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:02,689 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:02,689 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:02,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380278673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:02,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:02,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:02,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479093107] [2021-06-05 05:08:02,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:02,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:02,712 INFO L87 Difference]: Start difference. First operand 214 states and 509 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) [2021-06-05 05:08:02,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:02,946 INFO L93 Difference]: Finished difference Result 330 states and 737 transitions. [2021-06-05 05:08:02,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:02,946 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 19 [2021-06-05 05:08:02,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:02,947 INFO L225 Difference]: With dead ends: 330 [2021-06-05 05:08:02,947 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 05:08:02,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 212.7ms TimeCoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:08:02,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 05:08:02,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 211. [2021-06-05 05:08:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.376190476190476) internal successors, (499), 210 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) [2021-06-05 05:08:02,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 499 transitions. [2021-06-05 05:08:02,949 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 499 transitions. Word has length 19 [2021-06-05 05:08:02,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:02,949 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 499 transitions. [2021-06-05 05:08:02,949 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) [2021-06-05 05:08:02,949 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 499 transitions. [2021-06-05 05:08:02,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:02,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:02,949 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:03,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16614 [2021-06-05 05:08:03,150 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1049283719, now seen corresponding path program 640 times [2021-06-05 05:08:03,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:03,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440539717] [2021-06-05 05:08:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:03,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:03,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:03,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440539717] [2021-06-05 05:08:03,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440539717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:03,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967231894] [2021-06-05 05:08:03,220 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 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 [2021-06-05 05:08:03,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:03,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:03,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:03,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:03,525 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:03,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:03,529 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 15 treesize of output 11 [2021-06-05 05:08:03,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:03,564 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:03,565 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:03,567 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 [2021-06-05 05:08:03,567 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:03,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:03,580 INFO L518 ElimStorePlain]: Eliminatee v_prenex_700 vanished before elimination [2021-06-05 05:08:03,581 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:03,581 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:03,609 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:03,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967231894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:03,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:03,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:03,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789597201] [2021-06-05 05:08:03,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:03,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:03,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:03,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:03,609 INFO L87 Difference]: Start difference. First operand 211 states and 499 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) [2021-06-05 05:08:03,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:03,895 INFO L93 Difference]: Finished difference Result 268 states and 604 transitions. [2021-06-05 05:08:03,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:08:03,895 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 19 [2021-06-05 05:08:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:03,896 INFO L225 Difference]: With dead ends: 268 [2021-06-05 05:08:03,896 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 05:08:03,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 334.9ms TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:03,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 05:08:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 211. [2021-06-05 05:08:03,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 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) [2021-06-05 05:08:03,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-06-05 05:08:03,898 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-06-05 05:08:03,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:03,898 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-06-05 05:08:03,898 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) [2021-06-05 05:08:03,898 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-06-05 05:08:03,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:03,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:03,898 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:04,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16618,644 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:04,099 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:04,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1963363643, now seen corresponding path program 641 times [2021-06-05 05:08:04,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:04,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287628774] [2021-06-05 05:08:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:04,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:04,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:04,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:04,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287628774] [2021-06-05 05:08:04,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287628774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:04,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553504147] [2021-06-05 05:08:04,173 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 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 [2021-06-05 05:08:04,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:08:04,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:04,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:04,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:04,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:04,330 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 16 treesize of output 12 [2021-06-05 05:08:04,330 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:04,332 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:04,333 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 15 treesize of output 11 [2021-06-05 05:08:04,333 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:04,354 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:08:04,354 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:04,355 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:04,355 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:08:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553504147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:04,375 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:04,375 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:04,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738424770] [2021-06-05 05:08:04,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:04,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:04,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:04,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:04,375 INFO L87 Difference]: Start difference. First operand 211 states and 498 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) [2021-06-05 05:08:04,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:04,773 INFO L93 Difference]: Finished difference Result 437 states and 918 transitions. [2021-06-05 05:08:04,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:08:04,773 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 [2021-06-05 05:08:04,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:04,774 INFO L225 Difference]: With dead ends: 437 [2021-06-05 05:08:04,774 INFO L226 Difference]: Without dead ends: 437 [2021-06-05 05:08:04,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 329.8ms TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:08:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-06-05 05:08:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 211. [2021-06-05 05:08:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.3714285714285714) internal successors, (498), 210 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) [2021-06-05 05:08:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 498 transitions. [2021-06-05 05:08:04,776 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 498 transitions. Word has length 19 [2021-06-05 05:08:04,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:04,776 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 498 transitions. [2021-06-05 05:08:04,776 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) [2021-06-05 05:08:04,776 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 498 transitions. [2021-06-05 05:08:04,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:04,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:04,777 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:04,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16644,645 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:04,985 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:04,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:04,985 INFO L82 PathProgramCache]: Analyzing trace with hash 980796118, now seen corresponding path program 642 times [2021-06-05 05:08:04,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:04,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669161674] [2021-06-05 05:08:04,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:04,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:05,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:05,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669161674] [2021-06-05 05:08:05,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669161674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:05,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220857096] [2021-06-05 05:08:05,053 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 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 [2021-06-05 05:08:05,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:08:05,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:05,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:05,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:05,209 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:05,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:05,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:08:05,211 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:05,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:05,213 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 16 treesize of output 12 [2021-06-05 05:08:05,214 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:05,242 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:08:05,242 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:05,243 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:05,243 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:08:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:05,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220857096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:05,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:05,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:05,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095168398] [2021-06-05 05:08:05,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:05,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:05,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:05,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:05,293 INFO L87 Difference]: Start difference. First operand 211 states and 498 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) [2021-06-05 05:08:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:06,002 INFO L93 Difference]: Finished difference Result 425 states and 880 transitions. [2021-06-05 05:08:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:08:06,002 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 [2021-06-05 05:08:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:06,002 INFO L225 Difference]: With dead ends: 425 [2021-06-05 05:08:06,002 INFO L226 Difference]: Without dead ends: 419 [2021-06-05 05:08:06,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 578.2ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:08:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2021-06-05 05:08:06,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 213. [2021-06-05 05:08:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 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) [2021-06-05 05:08:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-06-05 05:08:06,005 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-06-05 05:08:06,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:06,005 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-06-05 05:08:06,005 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) [2021-06-05 05:08:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-06-05 05:08:06,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:06,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:06,005 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:06,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16648,646 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:06,206 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:06,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:06,206 INFO L82 PathProgramCache]: Analyzing trace with hash 727640853, now seen corresponding path program 643 times [2021-06-05 05:08:06,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:06,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849744486] [2021-06-05 05:08:06,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:06,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:06,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849744486] [2021-06-05 05:08:06,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849744486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:06,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50431494] [2021-06-05 05:08:06,279 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 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 [2021-06-05 05:08:06,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:06,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:06,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:06,409 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 [2021-06-05 05:08:06,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:06,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:06,413 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:06,413 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 15 treesize of output 11 [2021-06-05 05:08:06,414 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:06,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:06,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:06,416 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 16 treesize of output 12 [2021-06-05 05:08:06,417 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:06,419 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 [2021-06-05 05:08:06,420 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:06,453 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:08:06,454 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:06,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:06,454 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:08:06,500 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:06,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50431494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:06,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:06,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:06,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305130625] [2021-06-05 05:08:06,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:06,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:06,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:06,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:06,501 INFO L87 Difference]: Start difference. First operand 213 states and 505 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) [2021-06-05 05:08:06,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:06,907 INFO L93 Difference]: Finished difference Result 491 states and 1021 transitions. [2021-06-05 05:08:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:08:06,908 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 [2021-06-05 05:08:06,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:06,908 INFO L225 Difference]: With dead ends: 491 [2021-06-05 05:08:06,908 INFO L226 Difference]: Without dead ends: 491 [2021-06-05 05:08:06,908 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 263.0ms TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:06,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-06-05 05:08:06,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 213. [2021-06-05 05:08:06,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.3820754716981134) internal successors, (505), 212 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) [2021-06-05 05:08:06,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 505 transitions. [2021-06-05 05:08:06,911 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 505 transitions. Word has length 19 [2021-06-05 05:08:06,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:06,911 INFO L482 AbstractCegarLoop]: Abstraction has 213 states and 505 transitions. [2021-06-05 05:08:06,911 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) [2021-06-05 05:08:06,911 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 505 transitions. [2021-06-05 05:08:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:06,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:06,911 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:07,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16666,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:07,112 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:07,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:07,112 INFO L82 PathProgramCache]: Analyzing trace with hash 280303130, now seen corresponding path program 644 times [2021-06-05 05:08:07,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:07,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523782431] [2021-06-05 05:08:07,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:07,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523782431] [2021-06-05 05:08:07,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523782431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960365728] [2021-06-05 05:08:07,179 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 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 [2021-06-05 05:08:07,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:07,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:07,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:07,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:07,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:07,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:07,331 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 16 treesize of output 12 [2021-06-05 05:08:07,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:07,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:07,334 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 15 treesize of output 11 [2021-06-05 05:08:07,335 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:07,363 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:08:07,363 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:07,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:07,364 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:08:07,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:07,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960365728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:07,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:07,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:07,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341417696] [2021-06-05 05:08:07,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:07,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:07,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:07,406 INFO L87 Difference]: Start difference. First operand 213 states and 505 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) [2021-06-05 05:08:07,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:07,799 INFO L93 Difference]: Finished difference Result 397 states and 841 transitions. [2021-06-05 05:08:07,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:08:07,799 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 19 [2021-06-05 05:08:07,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:07,799 INFO L225 Difference]: With dead ends: 397 [2021-06-05 05:08:07,799 INFO L226 Difference]: Without dead ends: 397 [2021-06-05 05:08:07,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:08:07,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-06-05 05:08:07,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 212. [2021-06-05 05:08:07,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.374407582938389) internal successors, (501), 211 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) [2021-06-05 05:08:07,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 501 transitions. [2021-06-05 05:08:07,802 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 501 transitions. Word has length 19 [2021-06-05 05:08:07,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:07,802 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 501 transitions. [2021-06-05 05:08:07,802 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) [2021-06-05 05:08:07,802 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 501 transitions. [2021-06-05 05:08:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:07,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:07,802 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:08,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16676 [2021-06-05 05:08:08,003 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1702494115, now seen corresponding path program 645 times [2021-06-05 05:08:08,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:08,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375118785] [2021-06-05 05:08:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:08,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:08,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:08,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375118785] [2021-06-05 05:08:08,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375118785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:08,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013215618] [2021-06-05 05:08:08,077 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 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 [2021-06-05 05:08:08,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:08:08,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:08,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:08,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:08,207 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:08,208 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:08,208 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 16 treesize of output 12 [2021-06-05 05:08:08,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:08,212 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 [2021-06-05 05:08:08,213 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:08,216 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 [2021-06-05 05:08:08,217 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:08,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:08,220 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 15 treesize of output 11 [2021-06-05 05:08:08,221 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:08,254 INFO L628 ElimStorePlain]: treesize reduction 50, result has 40.5 percent of original size [2021-06-05 05:08:08,254 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:08,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:08,255 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:08:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:08,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013215618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:08,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:08,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:08,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971829364] [2021-06-05 05:08:08,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:08,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:08,317 INFO L87 Difference]: Start difference. First operand 212 states and 501 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) [2021-06-05 05:08:08,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:08,974 INFO L93 Difference]: Finished difference Result 488 states and 999 transitions. [2021-06-05 05:08:08,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:08:08,974 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 19 [2021-06-05 05:08:08,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:08,975 INFO L225 Difference]: With dead ends: 488 [2021-06-05 05:08:08,975 INFO L226 Difference]: Without dead ends: 484 [2021-06-05 05:08:08,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 480.1ms TimeCoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:08:08,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-06-05 05:08:08,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 210. [2021-06-05 05:08:08,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.373205741626794) internal successors, (496), 209 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) [2021-06-05 05:08:08,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 496 transitions. [2021-06-05 05:08:08,977 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 496 transitions. Word has length 19 [2021-06-05 05:08:08,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:08,977 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 496 transitions. [2021-06-05 05:08:08,977 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) [2021-06-05 05:08:08,977 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 496 transitions. [2021-06-05 05:08:08,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:08,978 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:08,978 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:09,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16687 [2021-06-05 05:08:09,178 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:09,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:09,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1568541440, now seen corresponding path program 646 times [2021-06-05 05:08:09,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:09,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199000690] [2021-06-05 05:08:09,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:09,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:09,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199000690] [2021-06-05 05:08:09,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199000690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,245 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607130766] [2021-06-05 05:08:09,245 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 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 [2021-06-05 05:08:09,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:09,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:09,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:09,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:09,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:09,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:09,387 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 16 treesize of output 12 [2021-06-05 05:08:09,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:09,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:09,389 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 [2021-06-05 05:08:09,390 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:09,415 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:09,415 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:09,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:09,415 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:09,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607130766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:09,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:09,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:09,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327540299] [2021-06-05 05:08:09,464 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:09,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:09,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:09,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:09,464 INFO L87 Difference]: Start difference. First operand 210 states and 496 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) [2021-06-05 05:08:11,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:11,659 INFO L93 Difference]: Finished difference Result 698 states and 1341 transitions. [2021-06-05 05:08:11,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-06-05 05:08:11,659 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 [2021-06-05 05:08:11,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:11,660 INFO L225 Difference]: With dead ends: 698 [2021-06-05 05:08:11,660 INFO L226 Difference]: Without dead ends: 692 [2021-06-05 05:08:11,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2088 ImplicationChecksByTransitivity, 1945.0ms TimeCoverageRelationStatistics Valid=651, Invalid=5511, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:08:11,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-06-05 05:08:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 221. [2021-06-05 05:08:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 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) [2021-06-05 05:08:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 05:08:11,663 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 05:08:11,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:11,663 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 05:08:11,663 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) [2021-06-05 05:08:11,663 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 05:08:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:11,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:11,664 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:11,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16700,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:11,864 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1315386175, now seen corresponding path program 647 times [2021-06-05 05:08:11,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:11,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138549660] [2021-06-05 05:08:11,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:11,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:11,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138549660] [2021-06-05 05:08:11,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138549660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:11,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577298423] [2021-06-05 05:08:11,930 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 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 [2021-06-05 05:08:11,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:08:11,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:11,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:11,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:12,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:12,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:12,098 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 16 treesize of output 12 [2021-06-05 05:08:12,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:12,101 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 [2021-06-05 05:08:12,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:12,141 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:08:12,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_702 vanished before elimination [2021-06-05 05:08:12,143 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 [2021-06-05 05:08:12,144 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:12,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:12,158 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:12,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:12,158 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:12,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:12,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577298423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:12,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:12,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:12,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618625227] [2021-06-05 05:08:12,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:12,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:12,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:12,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:12,210 INFO L87 Difference]: Start difference. First operand 221 states and 537 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) [2021-06-05 05:08:12,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:12,720 INFO L93 Difference]: Finished difference Result 445 states and 934 transitions. [2021-06-05 05:08:12,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:08:12,721 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 [2021-06-05 05:08:12,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:12,721 INFO L225 Difference]: With dead ends: 445 [2021-06-05 05:08:12,721 INFO L226 Difference]: Without dead ends: 439 [2021-06-05 05:08:12,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:08:12,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-06-05 05:08:12,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 221. [2021-06-05 05:08:12,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.440909090909091) internal successors, (537), 220 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) [2021-06-05 05:08:12,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 537 transitions. [2021-06-05 05:08:12,724 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 537 transitions. Word has length 19 [2021-06-05 05:08:12,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:12,724 INFO L482 AbstractCegarLoop]: Abstraction has 221 states and 537 transitions. [2021-06-05 05:08:12,724 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) [2021-06-05 05:08:12,724 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 537 transitions. [2021-06-05 05:08:12,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:12,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:12,724 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:12,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16710,651 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:12,924 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:12,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:12,925 INFO L82 PathProgramCache]: Analyzing trace with hash 868048452, now seen corresponding path program 648 times [2021-06-05 05:08:12,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:12,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827608406] [2021-06-05 05:08:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:12,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:12,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827608406] [2021-06-05 05:08:12,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827608406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:12,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407820894] [2021-06-05 05:08:12,991 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 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 [2021-06-05 05:08:13,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:13,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:13,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:13,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:13,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:13,133 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:13,134 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 15 treesize of output 11 [2021-06-05 05:08:13,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:13,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:13,137 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 16 treesize of output 12 [2021-06-05 05:08:13,137 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:13,163 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:13,163 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:13,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:13,164 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:13,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:13,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407820894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:13,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:13,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485757204] [2021-06-05 05:08:13,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:13,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:13,206 INFO L87 Difference]: Start difference. First operand 221 states and 537 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) [2021-06-05 05:08:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:14,408 INFO L93 Difference]: Finished difference Result 585 states and 1189 transitions. [2021-06-05 05:08:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:08:14,409 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 19 [2021-06-05 05:08:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:14,409 INFO L225 Difference]: With dead ends: 585 [2021-06-05 05:08:14,409 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 05:08:14,409 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1093.9ms TimeCoverageRelationStatistics Valid=370, Invalid=2386, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:08:14,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 05:08:14,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 217. [2021-06-05 05:08:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.412037037037037) internal successors, (521), 216 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 521 transitions. [2021-06-05 05:08:14,412 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 521 transitions. Word has length 19 [2021-06-05 05:08:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:14,412 INFO L482 AbstractCegarLoop]: Abstraction has 217 states and 521 transitions. [2021-06-05 05:08:14,412 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) [2021-06-05 05:08:14,412 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 521 transitions. [2021-06-05 05:08:14,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:14,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:14,413 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:14,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16727 [2021-06-05 05:08:14,613 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1114748793, now seen corresponding path program 649 times [2021-06-05 05:08:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:14,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236292917] [2021-06-05 05:08:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:14,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:14,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236292917] [2021-06-05 05:08:14,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236292917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783711520] [2021-06-05 05:08:14,687 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 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 [2021-06-05 05:08:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:14,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:14,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:14,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:14,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:14,856 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 15 treesize of output 11 [2021-06-05 05:08:14,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:14,859 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:14,860 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:14,895 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:08:14,897 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 [2021-06-05 05:08:14,898 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:14,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:14,911 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:14,912 INFO L518 ElimStorePlain]: Eliminatee v_prenex_706 vanished before elimination [2021-06-05 05:08:14,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:14,912 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:14,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783711520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:14,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:14,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:14,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672981693] [2021-06-05 05:08:14,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:14,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:14,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:14,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:14,985 INFO L87 Difference]: Start difference. First operand 217 states and 521 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) [2021-06-05 05:08:15,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:15,818 INFO L93 Difference]: Finished difference Result 457 states and 934 transitions. [2021-06-05 05:08:15,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:08:15,818 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 19 [2021-06-05 05:08:15,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:15,818 INFO L225 Difference]: With dead ends: 457 [2021-06-05 05:08:15,818 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 05:08:15,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 716.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1685, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:08:15,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 05:08:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 216. [2021-06-05 05:08:15,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.4093023255813955) internal successors, (518), 215 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:15,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 518 transitions. [2021-06-05 05:08:15,821 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 518 transitions. Word has length 19 [2021-06-05 05:08:15,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:15,821 INFO L482 AbstractCegarLoop]: Abstraction has 216 states and 518 transitions. [2021-06-05 05:08:15,821 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) [2021-06-05 05:08:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 518 transitions. [2021-06-05 05:08:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:15,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:15,821 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:16,022 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16735,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:16,022 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:16,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:16,022 INFO L82 PathProgramCache]: Analyzing trace with hash 332818650, now seen corresponding path program 650 times [2021-06-05 05:08:16,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:16,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479268277] [2021-06-05 05:08:16,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:16,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:16,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479268277] [2021-06-05 05:08:16,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479268277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:16,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125908064] [2021-06-05 05:08:16,090 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 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 [2021-06-05 05:08:16,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:16,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:16,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:16,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:16,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:16,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:16,244 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 16 treesize of output 12 [2021-06-05 05:08:16,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:16,247 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:16,247 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 15 treesize of output 11 [2021-06-05 05:08:16,248 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:16,269 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:16,269 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:16,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:16,270 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:16,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125908064] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:16,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:16,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:16,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214205786] [2021-06-05 05:08:16,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:16,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:16,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:16,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:16,292 INFO L87 Difference]: Start difference. First operand 216 states and 518 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) [2021-06-05 05:08:16,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:16,796 INFO L93 Difference]: Finished difference Result 465 states and 973 transitions. [2021-06-05 05:08:16,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:08:16,796 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 19 [2021-06-05 05:08:16,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:16,796 INFO L225 Difference]: With dead ends: 465 [2021-06-05 05:08:16,796 INFO L226 Difference]: Without dead ends: 465 [2021-06-05 05:08:16,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=131, Invalid=925, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:08:16,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-06-05 05:08:16,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 211. [2021-06-05 05:08:16,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:16,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-06-05 05:08:16,799 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-06-05 05:08:16,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:16,799 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-06-05 05:08:16,799 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) [2021-06-05 05:08:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-06-05 05:08:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:16,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:16,800 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:17,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16755,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:17,000 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash -39037637, now seen corresponding path program 651 times [2021-06-05 05:08:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:17,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758552627] [2021-06-05 05:08:17,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:17,068 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:17,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:17,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758552627] [2021-06-05 05:08:17,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758552627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:17,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781678577] [2021-06-05 05:08:17,069 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 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 [2021-06-05 05:08:17,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:08:17,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:17,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:17,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:17,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:17,322 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:17,322 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 15 treesize of output 11 [2021-06-05 05:08:17,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:17,325 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:17,325 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:17,359 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:17,361 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 7 treesize of output 5 [2021-06-05 05:08:17,362 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:17,374 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:17,374 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:17,374 INFO L518 ElimStorePlain]: Eliminatee v_prenex_711 vanished before elimination [2021-06-05 05:08:17,375 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:17,375 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:17,401 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:17,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781678577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:17,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:17,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:17,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293927916] [2021-06-05 05:08:17,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:17,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:17,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:17,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:17,402 INFO L87 Difference]: Start difference. First operand 211 states and 500 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) [2021-06-05 05:08:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:17,943 INFO L93 Difference]: Finished difference Result 353 states and 752 transitions. [2021-06-05 05:08:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:08:17,943 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 19 [2021-06-05 05:08:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:17,943 INFO L225 Difference]: With dead ends: 353 [2021-06-05 05:08:17,943 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 05:08:17,943 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 552.7ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:08:17,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 05:08:17,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 210. [2021-06-05 05:08:17,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 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) [2021-06-05 05:08:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 05:08:17,946 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 05:08:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:17,946 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 05:08:17,946 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) [2021-06-05 05:08:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 05:08:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:17,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:17,946 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:18,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16759,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:18,146 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:18,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1686190058, now seen corresponding path program 652 times [2021-06-05 05:08:18,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:18,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952792315] [2021-06-05 05:08:18,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:18,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:18,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:18,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:18,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952792315] [2021-06-05 05:08:18,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952792315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:18,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786974285] [2021-06-05 05:08:18,213 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 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 [2021-06-05 05:08:18,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:18,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:18,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:18,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:18,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:18,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:18,367 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 15 treesize of output 11 [2021-06-05 05:08:18,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:18,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:18,369 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 16 treesize of output 12 [2021-06-05 05:08:18,370 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:18,395 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:18,395 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:18,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:18,396 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:18,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786974285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:18,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:18,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:18,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328161769] [2021-06-05 05:08:18,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:18,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:18,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:18,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:18,445 INFO L87 Difference]: Start difference. First operand 210 states and 497 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) [2021-06-05 05:08:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:20,561 INFO L93 Difference]: Finished difference Result 483 states and 983 transitions. [2021-06-05 05:08:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:08:20,561 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 [2021-06-05 05:08:20,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:20,562 INFO L225 Difference]: With dead ends: 483 [2021-06-05 05:08:20,562 INFO L226 Difference]: Without dead ends: 477 [2021-06-05 05:08:20,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1049 ImplicationChecksByTransitivity, 1947.2ms TimeCoverageRelationStatistics Valid=545, Invalid=2995, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:08:20,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-06-05 05:08:20,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 219. [2021-06-05 05:08:20,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 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) [2021-06-05 05:08:20,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-06-05 05:08:20,564 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-06-05 05:08:20,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:20,565 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-06-05 05:08:20,565 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) [2021-06-05 05:08:20,565 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-06-05 05:08:20,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:20,565 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:20,565 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:20,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16775 [2021-06-05 05:08:20,765 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:20,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:20,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1939345323, now seen corresponding path program 653 times [2021-06-05 05:08:20,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:20,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825657616] [2021-06-05 05:08:20,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:20,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:20,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:20,833 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825657616] [2021-06-05 05:08:20,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825657616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:20,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497421219] [2021-06-05 05:08:20,833 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 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 [2021-06-05 05:08:20,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:08:20,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:20,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:20,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:21,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:21,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:21,035 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 16 treesize of output 12 [2021-06-05 05:08:21,036 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:21,038 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 [2021-06-05 05:08:21,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:21,079 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:08:21,081 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 [2021-06-05 05:08:21,082 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:21,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:21,096 INFO L518 ElimStorePlain]: Eliminatee v_prenex_715 vanished before elimination [2021-06-05 05:08:21,096 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:21,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:21,097 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:21,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497421219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:21,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:21,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:21,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909347531] [2021-06-05 05:08:21,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:21,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:21,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:21,151 INFO L87 Difference]: Start difference. First operand 219 states and 529 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) [2021-06-05 05:08:21,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:21,527 INFO L93 Difference]: Finished difference Result 336 states and 723 transitions. [2021-06-05 05:08:21,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:08:21,527 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 [2021-06-05 05:08:21,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:21,527 INFO L225 Difference]: With dead ends: 336 [2021-06-05 05:08:21,527 INFO L226 Difference]: Without dead ends: 330 [2021-06-05 05:08:21,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 402.1ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:08:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-06-05 05:08:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 219. [2021-06-05 05:08:21,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.426605504587156) internal successors, (529), 218 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) [2021-06-05 05:08:21,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 529 transitions. [2021-06-05 05:08:21,530 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 529 transitions. Word has length 19 [2021-06-05 05:08:21,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:21,530 INFO L482 AbstractCegarLoop]: Abstraction has 219 states and 529 transitions. [2021-06-05 05:08:21,530 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) [2021-06-05 05:08:21,530 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 529 transitions. [2021-06-05 05:08:21,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:21,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:21,530 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:21,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16785 [2021-06-05 05:08:21,731 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:21,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:21,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1908284250, now seen corresponding path program 654 times [2021-06-05 05:08:21,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:21,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702977938] [2021-06-05 05:08:21,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:21,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:21,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:21,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702977938] [2021-06-05 05:08:21,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702977938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:21,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196368686] [2021-06-05 05:08:21,812 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 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 [2021-06-05 05:08:21,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:21,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:21,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:21,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:22,134 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:22,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:22,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:08:22,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:22,144 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:22,145 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 15 treesize of output 11 [2021-06-05 05:08:22,145 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:22,171 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:22,171 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:22,172 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:22,172 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:22,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196368686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:22,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:22,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:22,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114479663] [2021-06-05 05:08:22,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:22,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:22,221 INFO L87 Difference]: Start difference. First operand 219 states and 529 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) [2021-06-05 05:08:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:23,355 INFO L93 Difference]: Finished difference Result 440 states and 916 transitions. [2021-06-05 05:08:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:08:23,355 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 19 [2021-06-05 05:08:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:23,355 INFO L225 Difference]: With dead ends: 440 [2021-06-05 05:08:23,355 INFO L226 Difference]: Without dead ends: 436 [2021-06-05 05:08:23,356 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1115.8ms TimeCoverageRelationStatistics Valid=290, Invalid=1516, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:08:23,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-06-05 05:08:23,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 211. [2021-06-05 05:08:23,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.380952380952381) internal successors, (500), 210 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:23,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 500 transitions. [2021-06-05 05:08:23,358 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 500 transitions. Word has length 19 [2021-06-05 05:08:23,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:23,358 INFO L482 AbstractCegarLoop]: Abstraction has 211 states and 500 transitions. [2021-06-05 05:08:23,358 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) [2021-06-05 05:08:23,358 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 500 transitions. [2021-06-05 05:08:23,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:23,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:23,359 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:23,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16796 [2021-06-05 05:08:23,559 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:23,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:23,559 INFO L82 PathProgramCache]: Analyzing trace with hash -74512995, now seen corresponding path program 655 times [2021-06-05 05:08:23,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:23,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761845148] [2021-06-05 05:08:23,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:23,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761845148] [2021-06-05 05:08:23,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761845148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:23,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140648454] [2021-06-05 05:08:23,629 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 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 [2021-06-05 05:08:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:23,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:23,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:23,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:23,828 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 15 treesize of output 11 [2021-06-05 05:08:23,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:23,831 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:23,831 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:23,867 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:08:23,867 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:23,869 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 [2021-06-05 05:08:23,870 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:23,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:23,884 INFO L518 ElimStorePlain]: Eliminatee v_prenex_718 vanished before elimination [2021-06-05 05:08:23,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:23,885 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:23,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140648454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:23,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:23,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:23,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121914183] [2021-06-05 05:08:23,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:23,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:23,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:23,960 INFO L87 Difference]: Start difference. First operand 211 states and 500 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) [2021-06-05 05:08:24,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:24,620 INFO L93 Difference]: Finished difference Result 307 states and 660 transitions. [2021-06-05 05:08:24,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:08:24,620 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 19 [2021-06-05 05:08:24,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:24,621 INFO L225 Difference]: With dead ends: 307 [2021-06-05 05:08:24,621 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 05:08:24,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 606.7ms TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:08:24,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 05:08:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 210. [2021-06-05 05:08:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.3779904306220097) internal successors, (497), 209 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) [2021-06-05 05:08:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 497 transitions. [2021-06-05 05:08:24,623 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 497 transitions. Word has length 19 [2021-06-05 05:08:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:24,623 INFO L482 AbstractCegarLoop]: Abstraction has 210 states and 497 transitions. [2021-06-05 05:08:24,623 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) [2021-06-05 05:08:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 497 transitions. [2021-06-05 05:08:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:24,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:24,623 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:24,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16804 [2021-06-05 05:08:24,824 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:24,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:24,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1373054448, now seen corresponding path program 656 times [2021-06-05 05:08:24,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:24,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563870656] [2021-06-05 05:08:24,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:24,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:24,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:24,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563870656] [2021-06-05 05:08:24,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563870656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:24,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185546884] [2021-06-05 05:08:24,894 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 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 [2021-06-05 05:08:24,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:24,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:25,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:25,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:25,060 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 16 treesize of output 12 [2021-06-05 05:08:25,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:25,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:25,063 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 15 treesize of output 11 [2021-06-05 05:08:25,064 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:25,085 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:25,085 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:25,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:25,086 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:25,108 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:25,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185546884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:25,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:25,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:25,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389441890] [2021-06-05 05:08:25,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:25,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:25,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:25,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:25,108 INFO L87 Difference]: Start difference. First operand 210 states and 497 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) [2021-06-05 05:08:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:26,031 INFO L93 Difference]: Finished difference Result 327 states and 718 transitions. [2021-06-05 05:08:26,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:08:26,031 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 19 [2021-06-05 05:08:26,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:26,031 INFO L225 Difference]: With dead ends: 327 [2021-06-05 05:08:26,031 INFO L226 Difference]: Without dead ends: 327 [2021-06-05 05:08:26,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 860.7ms TimeCoverageRelationStatistics Valid=229, Invalid=1103, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:08:26,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-06-05 05:08:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 204. [2021-06-05 05:08:26,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.3596059113300494) internal successors, (479), 203 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 479 transitions. [2021-06-05 05:08:26,033 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 479 transitions. Word has length 19 [2021-06-05 05:08:26,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:26,034 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 479 transitions. [2021-06-05 05:08:26,034 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) [2021-06-05 05:08:26,034 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 479 transitions. [2021-06-05 05:08:26,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:26,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:26,034 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:26,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16824,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:26,234 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:26,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:26,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1960799770, now seen corresponding path program 657 times [2021-06-05 05:08:26,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:26,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446089521] [2021-06-05 05:08:26,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:26,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:26,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:26,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446089521] [2021-06-05 05:08:26,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446089521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:26,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759151951] [2021-06-05 05:08:26,305 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 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 [2021-06-05 05:08:26,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:08:26,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:26,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:26,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:26,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:26,487 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 15 treesize of output 11 [2021-06-05 05:08:26,487 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:26,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:26,490 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 16 treesize of output 12 [2021-06-05 05:08:26,491 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:26,516 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:26,516 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:26,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:26,517 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:26,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759151951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:26,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:26,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:26,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441662304] [2021-06-05 05:08:26,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:26,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:26,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:26,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:26,544 INFO L87 Difference]: Start difference. First operand 204 states and 479 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) [2021-06-05 05:08:26,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:26,852 INFO L93 Difference]: Finished difference Result 296 states and 653 transitions. [2021-06-05 05:08:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:08:26,853 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 19 [2021-06-05 05:08:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:26,853 INFO L225 Difference]: With dead ends: 296 [2021-06-05 05:08:26,853 INFO L226 Difference]: Without dead ends: 296 [2021-06-05 05:08:26,853 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-05 05:08:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-05 05:08:26,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3451776649746194) internal successors, (462), 197 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) [2021-06-05 05:08:26,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 462 transitions. [2021-06-05 05:08:26,855 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 462 transitions. Word has length 19 [2021-06-05 05:08:26,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:26,855 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 462 transitions. [2021-06-05 05:08:26,855 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) [2021-06-05 05:08:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 462 transitions. [2021-06-05 05:08:26,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:26,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:26,855 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:27,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16828,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:27,056 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:27,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:27,056 INFO L82 PathProgramCache]: Analyzing trace with hash -11494371, now seen corresponding path program 658 times [2021-06-05 05:08:27,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:27,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902744039] [2021-06-05 05:08:27,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:27,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:27,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:08:27,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:27,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902744039] [2021-06-05 05:08:27,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902744039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:27,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508115509] [2021-06-05 05:08:27,128 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 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 [2021-06-05 05:08:27,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:27,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:27,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:27,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:27,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:27,426 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 15 treesize of output 11 [2021-06-05 05:08:27,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:27,429 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:27,430 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:27,466 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:27,467 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:27,469 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 [2021-06-05 05:08:27,470 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:27,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:27,484 INFO L518 ElimStorePlain]: Eliminatee v_prenex_722 vanished before elimination [2021-06-05 05:08:27,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:27,485 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:27,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508115509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:27,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:27,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-06-05 05:08:27,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304510021] [2021-06-05 05:08:27,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:27,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:27,518 INFO L87 Difference]: Start difference. First operand 198 states and 462 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) [2021-06-05 05:08:27,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:27,933 INFO L93 Difference]: Finished difference Result 246 states and 547 transitions. [2021-06-05 05:08:27,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:27,934 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 19 [2021-06-05 05:08:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:27,934 INFO L225 Difference]: With dead ends: 246 [2021-06-05 05:08:27,934 INFO L226 Difference]: Without dead ends: 234 [2021-06-05 05:08:27,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 473.9ms TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:08:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-06-05 05:08:27,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 198. [2021-06-05 05:08:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 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) [2021-06-05 05:08:27,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-06-05 05:08:27,936 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 19 [2021-06-05 05:08:27,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:27,936 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-06-05 05:08:27,936 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) [2021-06-05 05:08:27,936 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-06-05 05:08:27,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:27,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:27,936 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:28,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16832,662 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:28,137 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:28,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:28,137 INFO L82 PathProgramCache]: Analyzing trace with hash 496348608, now seen corresponding path program 659 times [2021-06-05 05:08:28,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:28,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275385205] [2021-06-05 05:08:28,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:28,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:28,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:28,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:28,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275385205] [2021-06-05 05:08:28,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275385205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:28,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121802350] [2021-06-05 05:08:28,218 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 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 [2021-06-05 05:08:28,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:08:28,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:28,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:28,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:28,392 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:28,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:28,393 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 16 treesize of output 12 [2021-06-05 05:08:28,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:28,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:28,396 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 15 treesize of output 11 [2021-06-05 05:08:28,397 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:28,427 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:28,427 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:28,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:28,428 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:28,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:28,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121802350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:28,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:28,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:28,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879609700] [2021-06-05 05:08:28,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:28,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:28,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:28,484 INFO L87 Difference]: Start difference. First operand 198 states and 460 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) [2021-06-05 05:08:29,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:29,737 INFO L93 Difference]: Finished difference Result 329 states and 702 transitions. [2021-06-05 05:08:29,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:08:29,737 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 [2021-06-05 05:08:29,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:29,737 INFO L225 Difference]: With dead ends: 329 [2021-06-05 05:08:29,737 INFO L226 Difference]: Without dead ends: 323 [2021-06-05 05:08:29,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1155.2ms TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:08:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-06-05 05:08:29,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 206. [2021-06-05 05:08:29,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 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) [2021-06-05 05:08:29,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 05:08:29,740 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 05:08:29,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:29,740 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 05:08:29,740 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) [2021-06-05 05:08:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 05:08:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:29,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:29,740 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:29,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16859,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:29,940 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash 243193343, now seen corresponding path program 660 times [2021-06-05 05:08:29,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:29,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066710737] [2021-06-05 05:08:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:30,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066710737] [2021-06-05 05:08:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066710737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928404655] [2021-06-05 05:08:30,022 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 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 [2021-06-05 05:08:30,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:30,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:30,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:30,246 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 [2021-06-05 05:08:30,247 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:30,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:30,250 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 [2021-06-05 05:08:30,250 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:30,289 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:08:30,289 INFO L518 ElimStorePlain]: Eliminatee v_prenex_725 vanished before elimination [2021-06-05 05:08:30,291 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 [2021-06-05 05:08:30,292 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:30,306 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:30,306 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:30,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:30,307 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:30,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928404655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:30,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:30,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:30,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651522698] [2021-06-05 05:08:30,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:30,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:30,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:30,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:30,361 INFO L87 Difference]: Start difference. First operand 206 states and 485 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) [2021-06-05 05:08:30,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:30,715 INFO L93 Difference]: Finished difference Result 311 states and 665 transitions. [2021-06-05 05:08:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:30,716 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 [2021-06-05 05:08:30,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:30,716 INFO L225 Difference]: With dead ends: 311 [2021-06-05 05:08:30,716 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 05:08:30,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:08:30,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 05:08:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 206. [2021-06-05 05:08:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 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) [2021-06-05 05:08:30,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 05:08:30,718 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 05:08:30,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:30,718 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 05:08:30,718 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) [2021-06-05 05:08:30,718 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 05:08:30,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:30,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:30,719 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:30,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16869 [2021-06-05 05:08:30,919 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:30,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:30,919 INFO L82 PathProgramCache]: Analyzing trace with hash -204144380, now seen corresponding path program 661 times [2021-06-05 05:08:30,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:30,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145975347] [2021-06-05 05:08:30,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:30,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:30,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:30,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145975347] [2021-06-05 05:08:30,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145975347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:30,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503006399] [2021-06-05 05:08:30,998 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 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 [2021-06-05 05:08:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:31,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:31,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:31,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:31,173 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:31,173 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 [2021-06-05 05:08:31,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:31,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:31,176 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 [2021-06-05 05:08:31,177 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:31,203 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:31,203 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:31,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:31,204 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:31,254 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:31,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503006399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:31,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:31,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:31,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853447259] [2021-06-05 05:08:31,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:31,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:31,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:31,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:31,254 INFO L87 Difference]: Start difference. First operand 206 states and 485 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) [2021-06-05 05:08:32,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:32,238 INFO L93 Difference]: Finished difference Result 338 states and 726 transitions. [2021-06-05 05:08:32,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:08:32,238 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 [2021-06-05 05:08:32,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:32,239 INFO L225 Difference]: With dead ends: 338 [2021-06-05 05:08:32,239 INFO L226 Difference]: Without dead ends: 338 [2021-06-05 05:08:32,239 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 906.7ms TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:08:32,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2021-06-05 05:08:32,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 206. [2021-06-05 05:08:32,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.3658536585365852) internal successors, (485), 205 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) [2021-06-05 05:08:32,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 485 transitions. [2021-06-05 05:08:32,241 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 485 transitions. Word has length 19 [2021-06-05 05:08:32,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:32,241 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 485 transitions. [2021-06-05 05:08:32,241 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) [2021-06-05 05:08:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 485 transitions. [2021-06-05 05:08:32,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:32,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:32,241 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:32,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16886,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:32,442 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:32,442 INFO L82 PathProgramCache]: Analyzing trace with hash 2108025671, now seen corresponding path program 662 times [2021-06-05 05:08:32,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:32,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55454843] [2021-06-05 05:08:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:32,521 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:32,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:32,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55454843] [2021-06-05 05:08:32,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55454843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:32,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670056676] [2021-06-05 05:08:32,521 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 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 [2021-06-05 05:08:32,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:32,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:32,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:32,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:32,735 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 [2021-06-05 05:08:32,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:32,738 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:32,738 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 15 treesize of output 11 [2021-06-05 05:08:32,739 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:32,779 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:08:32,779 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:32,781 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 [2021-06-05 05:08:32,782 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:32,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:32,795 INFO L518 ElimStorePlain]: Eliminatee v_prenex_728 vanished before elimination [2021-06-05 05:08:32,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:32,796 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:32,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670056676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:32,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:32,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:32,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693816187] [2021-06-05 05:08:32,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:32,875 INFO L87 Difference]: Start difference. First operand 206 states and 485 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) [2021-06-05 05:08:33,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:33,414 INFO L93 Difference]: Finished difference Result 315 states and 667 transitions. [2021-06-05 05:08:33,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:08:33,414 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 [2021-06-05 05:08:33,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:33,414 INFO L225 Difference]: With dead ends: 315 [2021-06-05 05:08:33,414 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 05:08:33,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 545.5ms TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:08:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 05:08:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-06-05 05:08:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-06-05 05:08:33,416 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-06-05 05:08:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:33,416 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-06-05 05:08:33,417 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) [2021-06-05 05:08:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-06-05 05:08:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:33,417 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:33,417 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:33,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16894 [2021-06-05 05:08:33,632 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:33,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:33,632 INFO L82 PathProgramCache]: Analyzing trace with hash -739374182, now seen corresponding path program 663 times [2021-06-05 05:08:33,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:33,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534690908] [2021-06-05 05:08:33,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:33,716 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:33,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:33,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534690908] [2021-06-05 05:08:33,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534690908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:33,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955214052] [2021-06-05 05:08:33,716 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 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 [2021-06-05 05:08:33,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:08:33,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:33,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:33,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:33,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:33,901 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 16 treesize of output 12 [2021-06-05 05:08:33,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:33,904 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:33,904 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 15 treesize of output 11 [2021-06-05 05:08:33,905 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:33,926 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:33,926 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:33,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:33,926 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:33,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955214052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:33,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:33,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:33,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138501058] [2021-06-05 05:08:33,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:33,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:33,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:33,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:33,950 INFO L87 Difference]: Start difference. First operand 205 states and 482 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) [2021-06-05 05:08:34,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:34,883 INFO L93 Difference]: Finished difference Result 311 states and 685 transitions. [2021-06-05 05:08:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:08:34,883 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 [2021-06-05 05:08:34,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:34,883 INFO L225 Difference]: With dead ends: 311 [2021-06-05 05:08:34,884 INFO L226 Difference]: Without dead ends: 311 [2021-06-05 05:08:34,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 789.2ms TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:08:34,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-06-05 05:08:34,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 205. [2021-06-05 05:08:34,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.3627450980392157) internal successors, (482), 204 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 482 transitions. [2021-06-05 05:08:34,886 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 482 transitions. Word has length 19 [2021-06-05 05:08:34,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:34,886 INFO L482 AbstractCegarLoop]: Abstraction has 205 states and 482 transitions. [2021-06-05 05:08:34,886 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) [2021-06-05 05:08:34,886 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 482 transitions. [2021-06-05 05:08:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:34,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:34,886 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:35,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16914,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:35,087 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:35,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:35,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1111230469, now seen corresponding path program 664 times [2021-06-05 05:08:35,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:35,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278298949] [2021-06-05 05:08:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:35,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:35,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:35,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278298949] [2021-06-05 05:08:35,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278298949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:35,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694810740] [2021-06-05 05:08:35,169 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 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 [2021-06-05 05:08:35,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:35,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:35,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:35,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:35,480 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:35,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:35,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:35,484 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 15 treesize of output 11 [2021-06-05 05:08:35,485 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:35,520 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:35,522 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 [2021-06-05 05:08:35,522 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:35,535 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:35,535 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:35,535 INFO L518 ElimStorePlain]: Eliminatee v_prenex_733 vanished before elimination [2021-06-05 05:08:35,536 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:35,536 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:35,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:35,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694810740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:35,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:35,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:35,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571082546] [2021-06-05 05:08:35,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:35,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:35,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:35,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:35,565 INFO L87 Difference]: Start difference. First operand 205 states and 482 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) [2021-06-05 05:08:35,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:35,983 INFO L93 Difference]: Finished difference Result 266 states and 588 transitions. [2021-06-05 05:08:35,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:08:35,983 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 [2021-06-05 05:08:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:35,983 INFO L225 Difference]: With dead ends: 266 [2021-06-05 05:08:35,984 INFO L226 Difference]: Without dead ends: 256 [2021-06-05 05:08:35,984 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:08:35,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-06-05 05:08:35,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 201. [2021-06-05 05:08:35,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-06-05 05:08:35,986 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-06-05 05:08:35,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:35,986 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-06-05 05:08:35,986 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) [2021-06-05 05:08:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-06-05 05:08:35,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:35,986 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:35,986 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:36,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16918,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:36,186 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash -151628860, now seen corresponding path program 665 times [2021-06-05 05:08:36,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:36,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849832637] [2021-06-05 05:08:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:36,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:36,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:36,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849832637] [2021-06-05 05:08:36,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849832637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:36,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665150973] [2021-06-05 05:08:36,269 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 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 [2021-06-05 05:08:36,297 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:08:36,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:36,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:36,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:36,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:36,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:36,446 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 15 treesize of output 11 [2021-06-05 05:08:36,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:36,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:36,449 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 16 treesize of output 12 [2021-06-05 05:08:36,449 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:36,470 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:36,470 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:36,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:36,470 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:36,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:36,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665150973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:36,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:36,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:36,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700683816] [2021-06-05 05:08:36,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:36,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:36,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:36,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:36,494 INFO L87 Difference]: Start difference. First operand 201 states and 472 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) [2021-06-05 05:08:36,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:36,986 INFO L93 Difference]: Finished difference Result 287 states and 638 transitions. [2021-06-05 05:08:36,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:36,986 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 [2021-06-05 05:08:36,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:36,986 INFO L225 Difference]: With dead ends: 287 [2021-06-05 05:08:36,986 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 05:08:36,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:08:36,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 05:08:36,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 201. [2021-06-05 05:08:36,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.36) internal successors, (472), 200 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 472 transitions. [2021-06-05 05:08:36,988 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 472 transitions. Word has length 19 [2021-06-05 05:08:36,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:36,988 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 472 transitions. [2021-06-05 05:08:36,988 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) [2021-06-05 05:08:36,988 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 472 transitions. [2021-06-05 05:08:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:36,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:36,989 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:37,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16934 [2021-06-05 05:08:37,189 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:37,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2123923001, now seen corresponding path program 666 times [2021-06-05 05:08:37,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:37,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345730610] [2021-06-05 05:08:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:37,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:37,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:37,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345730610] [2021-06-05 05:08:37,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345730610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:37,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647111481] [2021-06-05 05:08:37,278 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 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 [2021-06-05 05:08:37,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:08:37,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:37,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:37,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:37,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:37,606 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:37,606 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 15 treesize of output 11 [2021-06-05 05:08:37,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:37,609 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:37,609 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:37,644 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:37,644 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:37,646 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 [2021-06-05 05:08:37,647 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:37,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:37,660 INFO L518 ElimStorePlain]: Eliminatee v_prenex_740 vanished before elimination [2021-06-05 05:08:37,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:37,661 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:37,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:37,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647111481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:37,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:37,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:37,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868819565] [2021-06-05 05:08:37,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:37,690 INFO L87 Difference]: Start difference. First operand 201 states and 472 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) [2021-06-05 05:08:38,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:38,019 INFO L93 Difference]: Finished difference Result 255 states and 568 transitions. [2021-06-05 05:08:38,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:08:38,019 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 [2021-06-05 05:08:38,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:38,019 INFO L225 Difference]: With dead ends: 255 [2021-06-05 05:08:38,019 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 05:08:38,019 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 401.7ms TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:08:38,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 05:08:38,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 199. [2021-06-05 05:08:38,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 2.3535353535353534) internal successors, (466), 198 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:38,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 466 transitions. [2021-06-05 05:08:38,021 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 466 transitions. Word has length 19 [2021-06-05 05:08:38,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:38,021 INFO L482 AbstractCegarLoop]: Abstraction has 199 states and 466 transitions. [2021-06-05 05:08:38,021 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) [2021-06-05 05:08:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 466 transitions. [2021-06-05 05:08:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:38,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:38,022 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:38,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16938 [2021-06-05 05:08:38,222 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:38,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:38,222 INFO L82 PathProgramCache]: Analyzing trace with hash 888606938, now seen corresponding path program 667 times [2021-06-05 05:08:38,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:38,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383761242] [2021-06-05 05:08:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:38,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:38,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:38,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383761242] [2021-06-05 05:08:38,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383761242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:38,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523438241] [2021-06-05 05:08:38,304 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 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 [2021-06-05 05:08:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:38,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:38,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:38,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:38,476 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:38,477 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 [2021-06-05 05:08:38,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:38,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:38,479 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 16 treesize of output 12 [2021-06-05 05:08:38,480 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:38,501 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:38,501 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:38,501 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:38,501 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:38,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:38,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523438241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:38,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:38,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:38,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642103557] [2021-06-05 05:08:38,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:38,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:38,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:38,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:38,524 INFO L87 Difference]: Start difference. First operand 199 states and 466 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) [2021-06-05 05:08:38,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:38,768 INFO L93 Difference]: Finished difference Result 275 states and 611 transitions. [2021-06-05 05:08:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:08:38,768 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 [2021-06-05 05:08:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:38,768 INFO L225 Difference]: With dead ends: 275 [2021-06-05 05:08:38,769 INFO L226 Difference]: Without dead ends: 275 [2021-06-05 05:08:38,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:08:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2021-06-05 05:08:38,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 195. [2021-06-05 05:08:38,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 05:08:38,771 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 05:08:38,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:38,771 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 05:08:38,771 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) [2021-06-05 05:08:38,771 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 05:08:38,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:38,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:38,771 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:38,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16964,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:38,971 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:38,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:38,972 INFO L82 PathProgramCache]: Analyzing trace with hash 842346875, now seen corresponding path program 668 times [2021-06-05 05:08:38,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:38,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553449344] [2021-06-05 05:08:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:39,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:39,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553449344] [2021-06-05 05:08:39,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553449344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:39,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85266638] [2021-06-05 05:08:39,056 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 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 [2021-06-05 05:08:39,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:39,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:39,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:39,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:39,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:39,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:39,388 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 15 treesize of output 11 [2021-06-05 05:08:39,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:39,391 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:39,391 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:39,425 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:39,425 INFO L518 ElimStorePlain]: Eliminatee v_prenex_746 vanished before elimination [2021-06-05 05:08:39,427 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 [2021-06-05 05:08:39,428 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:39,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:39,440 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:39,441 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:39,441 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:39,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85266638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:39,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:39,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-06-05 05:08:39,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60370816] [2021-06-05 05:08:39,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:08:39,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:39,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:08:39,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:08:39,473 INFO L87 Difference]: Start difference. First operand 195 states and 453 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) [2021-06-05 05:08:39,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:39,707 INFO L93 Difference]: Finished difference Result 245 states and 541 transitions. [2021-06-05 05:08:39,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:08:39,707 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 [2021-06-05 05:08:39,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:39,708 INFO L225 Difference]: With dead ends: 245 [2021-06-05 05:08:39,708 INFO L226 Difference]: Without dead ends: 229 [2021-06-05 05:08:39,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:08:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-06-05 05:08:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 193. [2021-06-05 05:08:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.328125) internal successors, (447), 192 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:39,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 447 transitions. [2021-06-05 05:08:39,709 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 447 transitions. Word has length 19 [2021-06-05 05:08:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:39,710 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 447 transitions. [2021-06-05 05:08:39,710 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) [2021-06-05 05:08:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 447 transitions. [2021-06-05 05:08:39,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:39,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:39,710 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:39,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16968,672 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:39,910 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:39,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:39,910 INFO L82 PathProgramCache]: Analyzing trace with hash 146256554, now seen corresponding path program 669 times [2021-06-05 05:08:39,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:39,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128059196] [2021-06-05 05:08:39,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:39,987 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:39,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:39,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128059196] [2021-06-05 05:08:39,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128059196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:39,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340193134] [2021-06-05 05:08:39,987 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 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 [2021-06-05 05:08:40,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:08:40,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:40,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:40,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:40,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:40,147 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:40,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:08:40,148 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:40,150 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 [2021-06-05 05:08:40,151 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:40,153 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 [2021-06-05 05:08:40,154 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:40,187 INFO L628 ElimStorePlain]: treesize reduction 36, result has 50.0 percent of original size [2021-06-05 05:08:40,187 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:40,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:40,188 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 3 variables, input treesize:93, output treesize:20 [2021-06-05 05:08:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:40,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340193134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:40,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:40,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:40,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466682268] [2021-06-05 05:08:40,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:40,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:40,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:40,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:40,215 INFO L87 Difference]: Start difference. First operand 193 states and 447 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) [2021-06-05 05:08:40,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:40,675 INFO L93 Difference]: Finished difference Result 392 states and 810 transitions. [2021-06-05 05:08:40,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:08:40,676 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 19 [2021-06-05 05:08:40,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:40,676 INFO L225 Difference]: With dead ends: 392 [2021-06-05 05:08:40,676 INFO L226 Difference]: Without dead ends: 383 [2021-06-05 05:08:40,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 361.0ms TimeCoverageRelationStatistics Valid=112, Invalid=818, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:08:40,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-06-05 05:08:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 193. [2021-06-05 05:08:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 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) [2021-06-05 05:08:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-06-05 05:08:40,678 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-06-05 05:08:40,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:40,678 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-06-05 05:08:40,678 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) [2021-06-05 05:08:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-06-05 05:08:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:40,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:40,679 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:40,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 673 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16994 [2021-06-05 05:08:40,879 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:40,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:40,879 INFO L82 PathProgramCache]: Analyzing trace with hash 888377931, now seen corresponding path program 670 times [2021-06-05 05:08:40,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:40,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992443100] [2021-06-05 05:08:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:40,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:40,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:40,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:40,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992443100] [2021-06-05 05:08:40,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992443100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:40,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846888117] [2021-06-05 05:08:40,962 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 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 [2021-06-05 05:08:41,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:41,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:41,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:41,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:41,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:41,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:41,146 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 16 treesize of output 12 [2021-06-05 05:08:41,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:41,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:41,149 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 15 treesize of output 11 [2021-06-05 05:08:41,149 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:41,169 INFO L628 ElimStorePlain]: treesize reduction 35, result has 36.4 percent of original size [2021-06-05 05:08:41,169 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:41,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:41,170 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:69, output treesize:12 [2021-06-05 05:08:41,190 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:41,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846888117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:41,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:41,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:41,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63397396] [2021-06-05 05:08:41,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:41,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:41,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:41,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:41,190 INFO L87 Difference]: Start difference. First operand 193 states and 446 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) [2021-06-05 05:08:41,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:41,631 INFO L93 Difference]: Finished difference Result 471 states and 975 transitions. [2021-06-05 05:08:41,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:08:41,631 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 [2021-06-05 05:08:41,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:41,631 INFO L225 Difference]: With dead ends: 471 [2021-06-05 05:08:41,631 INFO L226 Difference]: Without dead ends: 471 [2021-06-05 05:08:41,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 313.6ms TimeCoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:08:41,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 471 states. [2021-06-05 05:08:41,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 471 to 193. [2021-06-05 05:08:41,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3229166666666665) internal successors, (446), 192 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) [2021-06-05 05:08:41,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 446 transitions. [2021-06-05 05:08:41,634 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 446 transitions. Word has length 19 [2021-06-05 05:08:41,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:41,634 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 446 transitions. [2021-06-05 05:08:41,634 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) [2021-06-05 05:08:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 446 transitions. [2021-06-05 05:08:41,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:41,634 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:41,634 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:41,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17009,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:41,835 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:41,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:41,835 INFO L82 PathProgramCache]: Analyzing trace with hash -94189594, now seen corresponding path program 671 times [2021-06-05 05:08:41,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:41,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764571625] [2021-06-05 05:08:41,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:41,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:41,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764571625] [2021-06-05 05:08:41,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764571625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:41,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278928410] [2021-06-05 05:08:41,910 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 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 [2021-06-05 05:08:41,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:08:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:41,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:41,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:42,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:42,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:42,055 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 15 treesize of output 11 [2021-06-05 05:08:42,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:42,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:42,058 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 16 treesize of output 12 [2021-06-05 05:08:42,058 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:42,086 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:08:42,086 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:42,087 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:42,087 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:08:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:42,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278928410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:42,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:42,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:42,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887332203] [2021-06-05 05:08:42,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:42,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:42,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:42,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:42,136 INFO L87 Difference]: Start difference. First operand 193 states and 446 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) [2021-06-05 05:08:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:42,839 INFO L93 Difference]: Finished difference Result 455 states and 924 transitions. [2021-06-05 05:08:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:08:42,839 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 19 [2021-06-05 05:08:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:42,840 INFO L225 Difference]: With dead ends: 455 [2021-06-05 05:08:42,840 INFO L226 Difference]: Without dead ends: 449 [2021-06-05 05:08:42,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 595.1ms TimeCoverageRelationStatistics Valid=174, Invalid=1232, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:08:42,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2021-06-05 05:08:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 195. [2021-06-05 05:08:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 05:08:42,842 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 05:08:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:42,842 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 05:08:42,842 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) [2021-06-05 05:08:42,842 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 05:08:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:42,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:42,843 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:43,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17013,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:43,049 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:43,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash -347344859, now seen corresponding path program 672 times [2021-06-05 05:08:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:43,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275420377] [2021-06-05 05:08:43,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:43,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:43,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275420377] [2021-06-05 05:08:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275420377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089608601] [2021-06-05 05:08:43,122 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 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 [2021-06-05 05:08:43,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:43,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:43,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:43,241 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 [2021-06-05 05:08:43,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:43,244 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:43,245 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:43,245 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 15 treesize of output 11 [2021-06-05 05:08:43,246 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:43,255 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:43,256 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:43,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:43,258 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 16 treesize of output 12 [2021-06-05 05:08:43,259 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:43,291 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:08:43,291 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:43,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:43,292 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:08:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:43,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089608601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:43,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:43,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:43,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137258] [2021-06-05 05:08:43,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:43,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:43,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:43,336 INFO L87 Difference]: Start difference. First operand 195 states and 453 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) [2021-06-05 05:08:43,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:43,805 INFO L93 Difference]: Finished difference Result 540 states and 1104 transitions. [2021-06-05 05:08:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:08:43,805 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 [2021-06-05 05:08:43,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:43,805 INFO L225 Difference]: With dead ends: 540 [2021-06-05 05:08:43,805 INFO L226 Difference]: Without dead ends: 540 [2021-06-05 05:08:43,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:08:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-06-05 05:08:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 195. [2021-06-05 05:08:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.3350515463917527) internal successors, (453), 194 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:43,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 453 transitions. [2021-06-05 05:08:43,808 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 453 transitions. Word has length 19 [2021-06-05 05:08:43,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:43,808 INFO L482 AbstractCegarLoop]: Abstraction has 195 states and 453 transitions. [2021-06-05 05:08:43,808 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) [2021-06-05 05:08:43,808 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 453 transitions. [2021-06-05 05:08:43,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:43,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:43,808 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:44,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17031 [2021-06-05 05:08:44,009 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:44,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:44,009 INFO L82 PathProgramCache]: Analyzing trace with hash -794682582, now seen corresponding path program 673 times [2021-06-05 05:08:44,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:44,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99246753] [2021-06-05 05:08:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:44,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:44,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:44,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99246753] [2021-06-05 05:08:44,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99246753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:44,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439253899] [2021-06-05 05:08:44,085 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 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 [2021-06-05 05:08:44,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:44,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:44,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:44,234 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:44,235 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 16 treesize of output 12 [2021-06-05 05:08:44,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:44,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:44,238 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 [2021-06-05 05:08:44,239 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:44,267 INFO L628 ElimStorePlain]: treesize reduction 42, result has 38.2 percent of original size [2021-06-05 05:08:44,267 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:44,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:44,268 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:82, output treesize:18 [2021-06-05 05:08:44,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:44,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439253899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:44,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617647977] [2021-06-05 05:08:44,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:44,311 INFO L87 Difference]: Start difference. First operand 195 states and 453 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) [2021-06-05 05:08:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:44,858 INFO L93 Difference]: Finished difference Result 430 states and 891 transitions. [2021-06-05 05:08:44,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:08:44,858 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 [2021-06-05 05:08:44,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:44,858 INFO L225 Difference]: With dead ends: 430 [2021-06-05 05:08:44,858 INFO L226 Difference]: Without dead ends: 430 [2021-06-05 05:08:44,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:08:44,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-06-05 05:08:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 194. [2021-06-05 05:08:44,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.326424870466321) internal successors, (449), 193 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:44,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 449 transitions. [2021-06-05 05:08:44,861 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 449 transitions. Word has length 19 [2021-06-05 05:08:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:44,861 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 449 transitions. [2021-06-05 05:08:44,861 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) [2021-06-05 05:08:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 449 transitions. [2021-06-05 05:08:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:44,861 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:44,861 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:45,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17040,677 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:45,062 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:45,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1517487469, now seen corresponding path program 674 times [2021-06-05 05:08:45,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:45,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348461414] [2021-06-05 05:08:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:45,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:45,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:45,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348461414] [2021-06-05 05:08:45,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348461414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:45,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404931380] [2021-06-05 05:08:45,142 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 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 [2021-06-05 05:08:45,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:45,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:45,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:45,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:45,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:45,261 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:45,261 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 16 treesize of output 12 [2021-06-05 05:08:45,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:45,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:45,265 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 15 treesize of output 11 [2021-06-05 05:08:45,265 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:45,267 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 [2021-06-05 05:08:45,268 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:45,270 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:45,271 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:45,303 INFO L628 ElimStorePlain]: treesize reduction 32, result has 51.5 percent of original size [2021-06-05 05:08:45,303 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:45,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:45,304 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:113, output treesize:18 [2021-06-05 05:08:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:45,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404931380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:45,369 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:45,369 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:45,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844426016] [2021-06-05 05:08:45,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:45,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:45,370 INFO L87 Difference]: Start difference. First operand 194 states and 449 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) [2021-06-05 05:08:46,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:46,091 INFO L93 Difference]: Finished difference Result 533 states and 1074 transitions. [2021-06-05 05:08:46,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:08:46,092 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 [2021-06-05 05:08:46,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:46,092 INFO L225 Difference]: With dead ends: 533 [2021-06-05 05:08:46,092 INFO L226 Difference]: Without dead ends: 529 [2021-06-05 05:08:46,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 591.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1692, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:08:46,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-06-05 05:08:46,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 191. [2021-06-05 05:08:46,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 2.3157894736842106) internal successors, (440), 190 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) [2021-06-05 05:08:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 440 transitions. [2021-06-05 05:08:46,095 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 440 transitions. Word has length 19 [2021-06-05 05:08:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:46,095 INFO L482 AbstractCegarLoop]: Abstraction has 191 states and 440 transitions. [2021-06-05 05:08:46,095 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) [2021-06-05 05:08:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 440 transitions. [2021-06-05 05:08:46,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:46,095 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:46,095 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:46,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17056 [2021-06-05 05:08:46,296 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:46,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:46,296 INFO L82 PathProgramCache]: Analyzing trace with hash 493555728, now seen corresponding path program 675 times [2021-06-05 05:08:46,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:46,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693506908] [2021-06-05 05:08:46,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:46,372 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:46,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:46,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693506908] [2021-06-05 05:08:46,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693506908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:46,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964760956] [2021-06-05 05:08:46,373 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 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 [2021-06-05 05:08:46,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:08:46,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:46,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:46,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:46,516 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 15 treesize of output 11 [2021-06-05 05:08:46,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:46,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:46,519 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 16 treesize of output 12 [2021-06-05 05:08:46,520 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:46,544 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:46,545 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:46,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:46,545 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:46,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:46,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964760956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:46,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:46,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:46,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410254690] [2021-06-05 05:08:46,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:46,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:46,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:46,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:46,595 INFO L87 Difference]: Start difference. First operand 191 states and 440 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) [2021-06-05 05:08:48,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:48,813 INFO L93 Difference]: Finished difference Result 768 states and 1465 transitions. [2021-06-05 05:08:48,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:08:48,814 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 19 [2021-06-05 05:08:48,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:48,815 INFO L225 Difference]: With dead ends: 768 [2021-06-05 05:08:48,815 INFO L226 Difference]: Without dead ends: 762 [2021-06-05 05:08:48,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2065 ImplicationChecksByTransitivity, 1970.8ms TimeCoverageRelationStatistics Valid=656, Invalid=5506, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:08:48,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-06-05 05:08:48,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 201. [2021-06-05 05:08:48,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-06-05 05:08:48,818 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-06-05 05:08:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:48,818 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-06-05 05:08:48,818 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) [2021-06-05 05:08:48,818 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-06-05 05:08:48,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:48,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:48,818 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:49,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17069 [2021-06-05 05:08:49,019 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:49,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:49,019 INFO L82 PathProgramCache]: Analyzing trace with hash 240400463, now seen corresponding path program 676 times [2021-06-05 05:08:49,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:49,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544853487] [2021-06-05 05:08:49,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:49,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544853487] [2021-06-05 05:08:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544853487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710953963] [2021-06-05 05:08:49,101 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 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 [2021-06-05 05:08:49,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:49,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:49,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:49,255 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 [2021-06-05 05:08:49,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:49,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:49,259 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 [2021-06-05 05:08:49,260 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:49,301 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:08:49,301 INFO L518 ElimStorePlain]: Eliminatee v_prenex_748 vanished before elimination [2021-06-05 05:08:49,303 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 [2021-06-05 05:08:49,304 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:49,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:49,318 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:49,319 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:49,319 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:49,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710953963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:49,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:49,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:49,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483610657] [2021-06-05 05:08:49,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:49,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:49,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:49,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:49,374 INFO L87 Difference]: Start difference. First operand 201 states and 478 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) [2021-06-05 05:08:49,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:49,937 INFO L93 Difference]: Finished difference Result 479 states and 984 transitions. [2021-06-05 05:08:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:08:49,937 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 19 [2021-06-05 05:08:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:49,937 INFO L225 Difference]: With dead ends: 479 [2021-06-05 05:08:49,937 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 05:08:49,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 507.3ms TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:08:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 05:08:49,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 201. [2021-06-05 05:08:49,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.39) internal successors, (478), 200 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:49,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 478 transitions. [2021-06-05 05:08:49,940 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 478 transitions. Word has length 19 [2021-06-05 05:08:49,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:49,940 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 478 transitions. [2021-06-05 05:08:49,940 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) [2021-06-05 05:08:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 478 transitions. [2021-06-05 05:08:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:49,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:49,940 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:50,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17079 [2021-06-05 05:08:50,141 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash -206937260, now seen corresponding path program 677 times [2021-06-05 05:08:50,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:50,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196054625] [2021-06-05 05:08:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:50,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:50,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:50,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196054625] [2021-06-05 05:08:50,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196054625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:50,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984842030] [2021-06-05 05:08:50,215 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 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 [2021-06-05 05:08:50,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:08:50,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:50,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:50,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:50,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:50,361 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:50,361 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 15 treesize of output 11 [2021-06-05 05:08:50,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:50,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:50,364 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 16 treesize of output 12 [2021-06-05 05:08:50,365 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:50,389 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:50,390 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:50,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:50,390 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:50,434 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:50,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984842030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:50,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:50,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:50,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289861696] [2021-06-05 05:08:50,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:50,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:50,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:50,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:50,435 INFO L87 Difference]: Start difference. First operand 201 states and 478 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) [2021-06-05 05:08:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:51,763 INFO L93 Difference]: Finished difference Result 661 states and 1325 transitions. [2021-06-05 05:08:51,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:08:51,763 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 [2021-06-05 05:08:51,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:51,764 INFO L225 Difference]: With dead ends: 661 [2021-06-05 05:08:51,764 INFO L226 Difference]: Without dead ends: 661 [2021-06-05 05:08:51,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1154.6ms TimeCoverageRelationStatistics Valid=383, Invalid=2479, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:08:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2021-06-05 05:08:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 198. [2021-06-05 05:08:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.3604060913705585) internal successors, (465), 197 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:51,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 465 transitions. [2021-06-05 05:08:51,767 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 465 transitions. Word has length 19 [2021-06-05 05:08:51,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:51,767 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 465 transitions. [2021-06-05 05:08:51,767 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) [2021-06-05 05:08:51,767 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 465 transitions. [2021-06-05 05:08:51,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:51,767 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:51,767 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:51,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17090,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:51,968 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:51,968 INFO L82 PathProgramCache]: Analyzing trace with hash 2105232791, now seen corresponding path program 678 times [2021-06-05 05:08:51,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:51,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686532757] [2021-06-05 05:08:51,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:51,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:52,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:52,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:52,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686532757] [2021-06-05 05:08:52,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686532757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:52,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420232337] [2021-06-05 05:08:52,049 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 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 [2021-06-05 05:08:52,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:08:52,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:52,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:52,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:52,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:52,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 [2021-06-05 05:08:52,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:52,236 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:52,237 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:52,274 INFO L628 ElimStorePlain]: treesize reduction 38, result has 53.1 percent of original size [2021-06-05 05:08:52,275 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:52,277 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 [2021-06-05 05:08:52,278 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:52,291 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:52,292 INFO L518 ElimStorePlain]: Eliminatee v_prenex_751 vanished before elimination [2021-06-05 05:08:52,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:52,293 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:52,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420232337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:52,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:52,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:52,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000458265] [2021-06-05 05:08:52,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:52,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:52,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:52,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:52,367 INFO L87 Difference]: Start difference. First operand 198 states and 465 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) [2021-06-05 05:08:53,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:53,367 INFO L93 Difference]: Finished difference Result 497 states and 997 transitions. [2021-06-05 05:08:53,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:08:53,367 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 [2021-06-05 05:08:53,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:53,368 INFO L225 Difference]: With dead ends: 497 [2021-06-05 05:08:53,368 INFO L226 Difference]: Without dead ends: 493 [2021-06-05 05:08:53,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 837.8ms TimeCoverageRelationStatistics Valid=240, Invalid=2016, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:08:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-06-05 05:08:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 197. [2021-06-05 05:08:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.357142857142857) internal successors, (462), 196 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) [2021-06-05 05:08:53,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 462 transitions. [2021-06-05 05:08:53,370 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 462 transitions. Word has length 19 [2021-06-05 05:08:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:53,371 INFO L482 AbstractCegarLoop]: Abstraction has 197 states and 462 transitions. [2021-06-05 05:08:53,371 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) [2021-06-05 05:08:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 462 transitions. [2021-06-05 05:08:53,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:53,371 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:53,371 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:53,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17098,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:53,571 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:53,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:53,571 INFO L82 PathProgramCache]: Analyzing trace with hash -742167062, now seen corresponding path program 679 times [2021-06-05 05:08:53,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:53,572 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539003980] [2021-06-05 05:08:53,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:53,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:53,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:53,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539003980] [2021-06-05 05:08:53,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539003980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:53,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172124151] [2021-06-05 05:08:53,649 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 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 [2021-06-05 05:08:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:53,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:53,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:53,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:53,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:53,790 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 16 treesize of output 12 [2021-06-05 05:08:53,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:53,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:53,792 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 15 treesize of output 11 [2021-06-05 05:08:53,793 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:53,814 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:08:53,814 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:53,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:08:53,814 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:08:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172124151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:53,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:53,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:53,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982404130] [2021-06-05 05:08:53,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:53,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:53,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:53,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:53,837 INFO L87 Difference]: Start difference. First operand 197 states and 462 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) [2021-06-05 05:08:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:54,444 INFO L93 Difference]: Finished difference Result 519 states and 1068 transitions. [2021-06-05 05:08:54,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:08:54,444 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 [2021-06-05 05:08:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:54,445 INFO L225 Difference]: With dead ends: 519 [2021-06-05 05:08:54,445 INFO L226 Difference]: Without dead ends: 519 [2021-06-05 05:08:54,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 451.6ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:08:54,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-06-05 05:08:54,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 194. [2021-06-05 05:08:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.33160621761658) internal successors, (450), 193 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 450 transitions. [2021-06-05 05:08:54,448 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 450 transitions. Word has length 19 [2021-06-05 05:08:54,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:54,448 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 450 transitions. [2021-06-05 05:08:54,448 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) [2021-06-05 05:08:54,448 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 450 transitions. [2021-06-05 05:08:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:54,448 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:54,448 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:54,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17118,683 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:54,649 INFO L430 AbstractCegarLoop]: === Iteration 701 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:54,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1114023349, now seen corresponding path program 680 times [2021-06-05 05:08:54,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:54,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496268693] [2021-06-05 05:08:54,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:54,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:54,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496268693] [2021-06-05 05:08:54,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496268693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:54,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997634004] [2021-06-05 05:08:54,728 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 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 [2021-06-05 05:08:54,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:08:54,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:54,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:54,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:54,978 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:08:54,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:54,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:54,981 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 15 treesize of output 11 [2021-06-05 05:08:54,982 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:55,017 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:08:55,018 INFO L518 ElimStorePlain]: Eliminatee v_prenex_758 vanished before elimination [2021-06-05 05:08:55,020 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 [2021-06-05 05:08:55,020 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:55,033 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:55,033 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:55,034 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:08:55,034 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:08:55,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:55,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997634004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:55,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:55,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:55,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612937154] [2021-06-05 05:08:55,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:55,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:55,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:55,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:55,062 INFO L87 Difference]: Start difference. First operand 194 states and 450 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) [2021-06-05 05:08:55,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:55,661 INFO L93 Difference]: Finished difference Result 385 states and 800 transitions. [2021-06-05 05:08:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:08:55,661 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 [2021-06-05 05:08:55,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:55,662 INFO L225 Difference]: With dead ends: 385 [2021-06-05 05:08:55,662 INFO L226 Difference]: Without dead ends: 377 [2021-06-05 05:08:55,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 575.2ms TimeCoverageRelationStatistics Valid=139, Invalid=1051, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:08:55,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-06-05 05:08:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 184. [2021-06-05 05:08:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.273224043715847) internal successors, (416), 183 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) [2021-06-05 05:08:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 416 transitions. [2021-06-05 05:08:55,664 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 416 transitions. Word has length 19 [2021-06-05 05:08:55,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:55,664 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 416 transitions. [2021-06-05 05:08:55,664 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) [2021-06-05 05:08:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 416 transitions. [2021-06-05 05:08:55,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:55,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:55,664 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:55,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17122,684 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:08:55,865 INFO L430 AbstractCegarLoop]: === Iteration 702 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:55,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:55,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1533791526, now seen corresponding path program 681 times [2021-06-05 05:08:55,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:55,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477220190] [2021-06-05 05:08:55,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:55,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:55,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477220190] [2021-06-05 05:08:55,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477220190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:55,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922539542] [2021-06-05 05:08:55,941 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 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 [2021-06-05 05:08:55,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:08:55,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:55,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:56,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:56,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:56,098 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 16 treesize of output 12 [2021-06-05 05:08:56,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:56,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:56,101 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 15 treesize of output 11 [2021-06-05 05:08:56,102 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:56,126 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:08:56,127 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:56,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:56,127 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:08:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:56,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922539542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:56,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:56,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:56,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107821868] [2021-06-05 05:08:56,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:56,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:56,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:56,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:56,178 INFO L87 Difference]: Start difference. First operand 184 states and 416 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) [2021-06-05 05:08:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:58,619 INFO L93 Difference]: Finished difference Result 542 states and 1062 transitions. [2021-06-05 05:08:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-05 05:08:58,619 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 19 [2021-06-05 05:08:58,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:58,620 INFO L225 Difference]: With dead ends: 542 [2021-06-05 05:08:58,620 INFO L226 Difference]: Without dead ends: 536 [2021-06-05 05:08:58,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1457 ImplicationChecksByTransitivity, 2191.6ms TimeCoverageRelationStatistics Valid=573, Invalid=4119, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:08:58,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-06-05 05:08:58,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 193. [2021-06-05 05:08:58,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:58,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-06-05 05:08:58,623 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-06-05 05:08:58,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:58,623 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-06-05 05:08:58,623 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) [2021-06-05 05:08:58,623 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-06-05 05:08:58,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:58,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:58,623 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:58,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17138 [2021-06-05 05:08:58,823 INFO L430 AbstractCegarLoop]: === Iteration 703 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:58,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:58,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1280636261, now seen corresponding path program 682 times [2021-06-05 05:08:58,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:58,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793108341] [2021-06-05 05:08:58,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:58,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:58,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:58,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793108341] [2021-06-05 05:08:58,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793108341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:58,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344069295] [2021-06-05 05:08:58,900 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 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 [2021-06-05 05:08:58,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:08:58,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:08:58,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:08:58,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:08:59,072 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 [2021-06-05 05:08:59,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:59,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:08:59,075 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 16 treesize of output 12 [2021-06-05 05:08:59,076 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:59,116 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:08:59,116 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:08:59,118 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 [2021-06-05 05:08:59,119 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:08:59,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:08:59,133 INFO L518 ElimStorePlain]: Eliminatee v_prenex_761 vanished before elimination [2021-06-05 05:08:59,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:08:59,134 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:08:59,186 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:59,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344069295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:59,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:08:59,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:08:59,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815442827] [2021-06-05 05:08:59,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:08:59,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:08:59,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:08:59,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:08:59,187 INFO L87 Difference]: Start difference. First operand 193 states and 448 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) [2021-06-05 05:08:59,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:08:59,705 INFO L93 Difference]: Finished difference Result 371 states and 765 transitions. [2021-06-05 05:08:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:08:59,705 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 [2021-06-05 05:08:59,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:08:59,705 INFO L225 Difference]: With dead ends: 371 [2021-06-05 05:08:59,705 INFO L226 Difference]: Without dead ends: 365 [2021-06-05 05:08:59,705 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 475.5ms TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:08:59,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-06-05 05:08:59,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 193. [2021-06-05 05:08:59,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 2.3333333333333335) internal successors, (448), 192 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:08:59,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 448 transitions. [2021-06-05 05:08:59,707 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 448 transitions. Word has length 19 [2021-06-05 05:08:59,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:08:59,708 INFO L482 AbstractCegarLoop]: Abstraction has 193 states and 448 transitions. [2021-06-05 05:08:59,708 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) [2021-06-05 05:08:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 448 transitions. [2021-06-05 05:08:59,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:08:59,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:08:59,708 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:08:59,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 686 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17148 [2021-06-05 05:08:59,908 INFO L430 AbstractCegarLoop]: === Iteration 704 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:08:59,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:08:59,908 INFO L82 PathProgramCache]: Analyzing trace with hash 833298538, now seen corresponding path program 683 times [2021-06-05 05:08:59,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:08:59,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884337658] [2021-06-05 05:08:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:08:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:08:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:08:59,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:08:59,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884337658] [2021-06-05 05:08:59,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884337658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:08:59,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821980954] [2021-06-05 05:08:59,984 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 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 [2021-06-05 05:09:00,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:09:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:00,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:00,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:00,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:00,133 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 16 treesize of output 12 [2021-06-05 05:09:00,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:00,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:00,136 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 15 treesize of output 11 [2021-06-05 05:09:00,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:00,161 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:09:00,162 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:00,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:00,162 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:09:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821980954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:00,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:00,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:00,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073434821] [2021-06-05 05:09:00,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:00,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:00,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:00,206 INFO L87 Difference]: Start difference. First operand 193 states and 448 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) [2021-06-05 05:09:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:01,627 INFO L93 Difference]: Finished difference Result 505 states and 1011 transitions. [2021-06-05 05:09:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:09:01,627 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 [2021-06-05 05:09:01,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:01,627 INFO L225 Difference]: With dead ends: 505 [2021-06-05 05:09:01,627 INFO L226 Difference]: Without dead ends: 501 [2021-06-05 05:09:01,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1292.4ms TimeCoverageRelationStatistics Valid=354, Invalid=2196, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:09:01,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-06-05 05:09:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 186. [2021-06-05 05:09:01,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2864864864864867) internal successors, (423), 185 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) [2021-06-05 05:09:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 423 transitions. [2021-06-05 05:09:01,630 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 423 transitions. Word has length 19 [2021-06-05 05:09:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:01,630 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 423 transitions. [2021-06-05 05:09:01,630 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) [2021-06-05 05:09:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 423 transitions. [2021-06-05 05:09:01,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:01,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:01,630 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:01,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 687 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17159 [2021-06-05 05:09:01,831 INFO L430 AbstractCegarLoop]: === Iteration 705 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:01,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:01,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1149498707, now seen corresponding path program 684 times [2021-06-05 05:09:01,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:01,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349833875] [2021-06-05 05:09:01,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:01,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:01,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349833875] [2021-06-05 05:09:01,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349833875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:01,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621819754] [2021-06-05 05:09:01,905 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 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 [2021-06-05 05:09:01,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:09:01,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:01,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:01,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:02,076 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 [2021-06-05 05:09:02,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:02,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:02,079 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 15 treesize of output 11 [2021-06-05 05:09:02,080 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:02,119 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:09:02,120 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:02,121 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 8 treesize of output 6 [2021-06-05 05:09:02,122 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:02,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:02,136 INFO L518 ElimStorePlain]: Eliminatee v_prenex_764 vanished before elimination [2021-06-05 05:09:02,137 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:02,137 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:09:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:02,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621819754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:02,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:02,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:02,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773054539] [2021-06-05 05:09:02,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:02,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:02,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:02,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:02,214 INFO L87 Difference]: Start difference. First operand 186 states and 423 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) [2021-06-05 05:09:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:02,982 INFO L93 Difference]: Finished difference Result 340 states and 701 transitions. [2021-06-05 05:09:02,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:09:02,982 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 [2021-06-05 05:09:02,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:02,982 INFO L225 Difference]: With dead ends: 340 [2021-06-05 05:09:02,982 INFO L226 Difference]: Without dead ends: 336 [2021-06-05 05:09:02,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=167, Invalid=1165, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:09:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-06-05 05:09:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 185. [2021-06-05 05:09:02,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.282608695652174) internal successors, (420), 184 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:02,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 420 transitions. [2021-06-05 05:09:02,984 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 420 transitions. Word has length 19 [2021-06-05 05:09:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:02,984 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 420 transitions. [2021-06-05 05:09:02,984 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) [2021-06-05 05:09:02,984 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 420 transitions. [2021-06-05 05:09:02,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:02,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:02,985 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:03,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17167,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:03,185 INFO L430 AbstractCegarLoop]: === Iteration 706 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:03,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:03,185 INFO L82 PathProgramCache]: Analyzing trace with hash 298068736, now seen corresponding path program 685 times [2021-06-05 05:09:03,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:03,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251667065] [2021-06-05 05:09:03,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:03,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:03,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:03,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251667065] [2021-06-05 05:09:03,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251667065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:03,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291371522] [2021-06-05 05:09:03,264 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 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 [2021-06-05 05:09:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:03,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:03,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:03,421 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:03,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:03,422 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 [2021-06-05 05:09:03,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:03,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:03,425 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 16 treesize of output 12 [2021-06-05 05:09:03,425 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:03,446 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:03,447 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:03,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:03,447 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:03,469 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:03,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291371522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:03,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:03,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:03,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563813928] [2021-06-05 05:09:03,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:03,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:03,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:03,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:03,470 INFO L87 Difference]: Start difference. First operand 185 states and 420 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) [2021-06-05 05:09:04,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:04,589 INFO L93 Difference]: Finished difference Result 388 states and 818 transitions. [2021-06-05 05:09:04,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:09:04,589 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 [2021-06-05 05:09:04,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:04,590 INFO L225 Difference]: With dead ends: 388 [2021-06-05 05:09:04,590 INFO L226 Difference]: Without dead ends: 388 [2021-06-05 05:09:04,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1015.1ms TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:09:04,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2021-06-05 05:09:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 179. [2021-06-05 05:09:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.264044943820225) internal successors, (403), 178 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:04,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 403 transitions. [2021-06-05 05:09:04,592 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 403 transitions. Word has length 19 [2021-06-05 05:09:04,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:04,592 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 403 transitions. [2021-06-05 05:09:04,592 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) [2021-06-05 05:09:04,592 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 403 transitions. [2021-06-05 05:09:04,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:04,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:04,592 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:04,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17181,689 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:04,793 INFO L430 AbstractCegarLoop]: === Iteration 707 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:04,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:04,793 INFO L82 PathProgramCache]: Analyzing trace with hash -73787551, now seen corresponding path program 686 times [2021-06-05 05:09:04,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:04,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131106163] [2021-06-05 05:09:04,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:04,870 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:04,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:04,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131106163] [2021-06-05 05:09:04,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131106163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:04,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384838387] [2021-06-05 05:09:04,871 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 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 [2021-06-05 05:09:04,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:04,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:04,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:04,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:05,125 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:09:05,126 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:05,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:05,129 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 15 treesize of output 11 [2021-06-05 05:09:05,129 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:05,164 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:09:05,166 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 [2021-06-05 05:09:05,167 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:05,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:05,180 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:05,180 INFO L518 ElimStorePlain]: Eliminatee v_prenex_766 vanished before elimination [2021-06-05 05:09:05,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:05,180 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:09:05,208 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:05,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384838387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:05,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:05,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:05,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171418742] [2021-06-05 05:09:05,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:05,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:05,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:05,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:05,209 INFO L87 Difference]: Start difference. First operand 179 states and 403 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) [2021-06-05 05:09:05,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:05,691 INFO L93 Difference]: Finished difference Result 284 states and 604 transitions. [2021-06-05 05:09:05,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:05,691 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 [2021-06-05 05:09:05,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:05,691 INFO L225 Difference]: With dead ends: 284 [2021-06-05 05:09:05,691 INFO L226 Difference]: Without dead ends: 276 [2021-06-05 05:09:05,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 493.8ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:09:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-06-05 05:09:05,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2021-06-05 05:09:05,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:05,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 05:09:05,693 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 05:09:05,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:05,693 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 05:09:05,694 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) [2021-06-05 05:09:05,694 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 05:09:05,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:05,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:05,694 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:05,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17185 [2021-06-05 05:09:05,894 INFO L430 AbstractCegarLoop]: === Iteration 708 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:05,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:05,894 INFO L82 PathProgramCache]: Analyzing trace with hash 885814058, now seen corresponding path program 687 times [2021-06-05 05:09:05,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:05,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542066126] [2021-06-05 05:09:05,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:05,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:05,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:05,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:05,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542066126] [2021-06-05 05:09:05,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542066126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:05,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353905043] [2021-06-05 05:09:05,972 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 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 [2021-06-05 05:09:06,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:06,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:06,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:06,132 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 16 treesize of output 12 [2021-06-05 05:09:06,133 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:06,135 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:06,135 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 15 treesize of output 11 [2021-06-05 05:09:06,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:06,156 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:06,156 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:06,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:06,157 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:06,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:06,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353905043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:06,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:06,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:06,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592150188] [2021-06-05 05:09:06,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:06,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:06,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:06,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:06,180 INFO L87 Difference]: Start difference. First operand 178 states and 400 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) [2021-06-05 05:09:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:06,540 INFO L93 Difference]: Finished difference Result 333 states and 703 transitions. [2021-06-05 05:09:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:09:06,540 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 [2021-06-05 05:09:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:06,540 INFO L225 Difference]: With dead ends: 333 [2021-06-05 05:09:06,540 INFO L226 Difference]: Without dead ends: 333 [2021-06-05 05:09:06,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:09:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-06-05 05:09:06,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 175. [2021-06-05 05:09:06,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 05:09:06,542 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 05:09:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:06,542 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 05:09:06,542 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) [2021-06-05 05:09:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 05:09:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:06,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:06,543 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:06,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 691 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17212 [2021-06-05 05:09:06,743 INFO L430 AbstractCegarLoop]: === Iteration 709 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:06,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1086480083, now seen corresponding path program 688 times [2021-06-05 05:09:06,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:06,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305735617] [2021-06-05 05:09:06,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:06,821 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:06,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305735617] [2021-06-05 05:09:06,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305735617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:06,821 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076643654] [2021-06-05 05:09:06,821 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 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 [2021-06-05 05:09:06,848 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:06,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:06,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:06,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:07,095 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:09:07,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:07,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:07,099 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 15 treesize of output 11 [2021-06-05 05:09:07,100 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:07,134 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:09:07,135 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:07,137 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 [2021-06-05 05:09:07,137 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:07,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:07,150 INFO L518 ElimStorePlain]: Eliminatee v_prenex_774 vanished before elimination [2021-06-05 05:09:07,151 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:07,151 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:09:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:07,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076643654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:07,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:07,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:07,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215273852] [2021-06-05 05:09:07,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:07,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:07,179 INFO L87 Difference]: Start difference. First operand 175 states and 390 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) [2021-06-05 05:09:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:07,612 INFO L93 Difference]: Finished difference Result 275 states and 582 transitions. [2021-06-05 05:09:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:07,613 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 [2021-06-05 05:09:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:07,613 INFO L225 Difference]: With dead ends: 275 [2021-06-05 05:09:07,613 INFO L226 Difference]: Without dead ends: 263 [2021-06-05 05:09:07,613 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:09:07,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2021-06-05 05:09:07,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 175. [2021-06-05 05:09:07,615 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) [2021-06-05 05:09:07,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 389 transitions. [2021-06-05 05:09:07,615 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 389 transitions. Word has length 19 [2021-06-05 05:09:07,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:07,615 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 389 transitions. [2021-06-05 05:09:07,615 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) [2021-06-05 05:09:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 389 transitions. [2021-06-05 05:09:07,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:07,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:07,615 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:07,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17216,692 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:07,816 INFO L430 AbstractCegarLoop]: === Iteration 710 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:07,816 INFO L82 PathProgramCache]: Analyzing trace with hash -578637104, now seen corresponding path program 689 times [2021-06-05 05:09:07,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:07,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870470817] [2021-06-05 05:09:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:07,896 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:07,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:07,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870470817] [2021-06-05 05:09:07,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870470817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:07,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523420969] [2021-06-05 05:09:07,897 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 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 [2021-06-05 05:09:07,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:09:07,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:07,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:07,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:08,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:08,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:08,071 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 15 treesize of output 11 [2021-06-05 05:09:08,071 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:08,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:08,074 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 16 treesize of output 12 [2021-06-05 05:09:08,074 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:08,100 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:09:08,101 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:08,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:08,101 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:09:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:08,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523420969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:08,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:08,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:08,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117840238] [2021-06-05 05:09:08,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:08,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:08,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:08,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:08,153 INFO L87 Difference]: Start difference. First operand 175 states and 389 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) [2021-06-05 05:09:08,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:08,602 INFO L93 Difference]: Finished difference Result 304 states and 636 transitions. [2021-06-05 05:09:08,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:09:08,602 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 19 [2021-06-05 05:09:08,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:08,603 INFO L225 Difference]: With dead ends: 304 [2021-06-05 05:09:08,603 INFO L226 Difference]: Without dead ends: 301 [2021-06-05 05:09:08,603 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 425.9ms TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:09:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-06-05 05:09:08,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 180. [2021-06-05 05:09:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 05:09:08,605 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 05:09:08,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:08,605 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 05:09:08,605 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) [2021-06-05 05:09:08,605 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 05:09:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:08,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:08,605 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:08,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 693 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17232 [2021-06-05 05:09:08,806 INFO L430 AbstractCegarLoop]: === Iteration 711 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:08,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:08,806 INFO L82 PathProgramCache]: Analyzing trace with hash -831792369, now seen corresponding path program 690 times [2021-06-05 05:09:08,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:08,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084794135] [2021-06-05 05:09:08,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:08,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084794135] [2021-06-05 05:09:08,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084794135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:08,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627897499] [2021-06-05 05:09:08,894 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 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 [2021-06-05 05:09:08,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:09:08,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:08,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:08,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:09,101 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 [2021-06-05 05:09:09,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:09,104 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:09,104 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 16 treesize of output 12 [2021-06-05 05:09:09,105 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:09,145 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:09:09,145 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:09,147 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 [2021-06-05 05:09:09,148 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:09,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:09,162 INFO L518 ElimStorePlain]: Eliminatee v_prenex_777 vanished before elimination [2021-06-05 05:09:09,163 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:09,163 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:09:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:09,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627897499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:09,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:09,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:09,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439363901] [2021-06-05 05:09:09,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:09,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:09,217 INFO L87 Difference]: Start difference. First operand 180 states and 405 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) [2021-06-05 05:09:09,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:09,416 INFO L93 Difference]: Finished difference Result 289 states and 613 transitions. [2021-06-05 05:09:09,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:09,417 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 [2021-06-05 05:09:09,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:09,417 INFO L225 Difference]: With dead ends: 289 [2021-06-05 05:09:09,417 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 05:09:09,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:09,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 05:09:09,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 180. [2021-06-05 05:09:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:09,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 05:09:09,419 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 05:09:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:09,419 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 05:09:09,419 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) [2021-06-05 05:09:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 05:09:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:09,419 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:09,419 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:09,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17242,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:09,620 INFO L430 AbstractCegarLoop]: === Iteration 712 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:09,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:09,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1279130092, now seen corresponding path program 691 times [2021-06-05 05:09:09,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:09,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772307622] [2021-06-05 05:09:09,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:09,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:09,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:09,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772307622] [2021-06-05 05:09:09,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772307622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:09,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797747563] [2021-06-05 05:09:09,700 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 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 [2021-06-05 05:09:09,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:09,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:09,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:09,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:09,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:09,864 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 15 treesize of output 11 [2021-06-05 05:09:09,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:09,867 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:09,867 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 16 treesize of output 12 [2021-06-05 05:09:09,868 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:09,893 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:09:09,893 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:09,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:09,894 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:09:09,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:09,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797747563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:09,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:09,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:09,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877821465] [2021-06-05 05:09:09,937 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:09,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:09,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:09,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:09,937 INFO L87 Difference]: Start difference. First operand 180 states and 405 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) [2021-06-05 05:09:10,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:10,320 INFO L93 Difference]: Finished difference Result 304 states and 639 transitions. [2021-06-05 05:09:10,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:09:10,321 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 [2021-06-05 05:09:10,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:10,321 INFO L225 Difference]: With dead ends: 304 [2021-06-05 05:09:10,321 INFO L226 Difference]: Without dead ends: 304 [2021-06-05 05:09:10,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 391.3ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:09:10,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-05 05:09:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 180. [2021-06-05 05:09:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.2625698324022347) internal successors, (405), 179 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 405 transitions. [2021-06-05 05:09:10,323 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 405 transitions. Word has length 19 [2021-06-05 05:09:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:10,323 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 405 transitions. [2021-06-05 05:09:10,323 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) [2021-06-05 05:09:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 405 transitions. [2021-06-05 05:09:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:10,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:10,323 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:10,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17253 [2021-06-05 05:09:10,524 INFO L430 AbstractCegarLoop]: === Iteration 713 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:10,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1033039959, now seen corresponding path program 692 times [2021-06-05 05:09:10,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:10,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58148194] [2021-06-05 05:09:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:10,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:10,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58148194] [2021-06-05 05:09:10,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58148194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:10,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760814678] [2021-06-05 05:09:10,605 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 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 [2021-06-05 05:09:10,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:10,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:10,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:10,845 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:10,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:10,846 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 16 treesize of output 12 [2021-06-05 05:09:10,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:10,849 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 [2021-06-05 05:09:10,850 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:10,891 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:09:10,893 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 [2021-06-05 05:09:10,894 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:10,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:10,908 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:10,908 INFO L518 ElimStorePlain]: Eliminatee v_prenex_780 vanished before elimination [2021-06-05 05:09:10,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:10,909 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:09:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:10,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760814678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:10,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:10,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:10,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430657358] [2021-06-05 05:09:10,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:10,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:10,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:10,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:10,984 INFO L87 Difference]: Start difference. First operand 180 states and 405 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) [2021-06-05 05:09:11,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:11,379 INFO L93 Difference]: Finished difference Result 291 states and 614 transitions. [2021-06-05 05:09:11,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:09:11,380 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 [2021-06-05 05:09:11,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:11,380 INFO L225 Difference]: With dead ends: 291 [2021-06-05 05:09:11,380 INFO L226 Difference]: Without dead ends: 289 [2021-06-05 05:09:11,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:09:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-06-05 05:09:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 179. [2021-06-05 05:09:11,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.258426966292135) internal successors, (402), 178 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:11,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 402 transitions. [2021-06-05 05:09:11,382 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 402 transitions. Word has length 19 [2021-06-05 05:09:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:11,382 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 402 transitions. [2021-06-05 05:09:11,382 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) [2021-06-05 05:09:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 402 transitions. [2021-06-05 05:09:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:11,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:11,382 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:11,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17261,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:11,583 INFO L430 AbstractCegarLoop]: === Iteration 714 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:11,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1814359894, now seen corresponding path program 693 times [2021-06-05 05:09:11,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:11,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942308799] [2021-06-05 05:09:11,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:11,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942308799] [2021-06-05 05:09:11,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942308799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:11,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372768724] [2021-06-05 05:09:11,666 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 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 [2021-06-05 05:09:11,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:09:11,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:11,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:11,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:11,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:11,840 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 [2021-06-05 05:09:11,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:11,843 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:11,843 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 16 treesize of output 12 [2021-06-05 05:09:11,844 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:11,865 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:11,865 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:11,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:11,865 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372768724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:11,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:11,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:11,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222888459] [2021-06-05 05:09:11,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:11,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:11,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:11,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:11,888 INFO L87 Difference]: Start difference. First operand 179 states and 402 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) [2021-06-05 05:09:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:12,073 INFO L93 Difference]: Finished difference Result 286 states and 611 transitions. [2021-06-05 05:09:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:12,073 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 [2021-06-05 05:09:12,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:12,074 INFO L225 Difference]: With dead ends: 286 [2021-06-05 05:09:12,074 INFO L226 Difference]: Without dead ends: 286 [2021-06-05 05:09:12,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:12,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-05 05:09:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 178. [2021-06-05 05:09:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:12,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 05:09:12,075 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 05:09:12,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:12,075 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 05:09:12,075 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) [2021-06-05 05:09:12,076 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 05:09:12,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:12,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:12,076 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:12,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 697 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17275 [2021-06-05 05:09:12,276 INFO L430 AbstractCegarLoop]: === Iteration 715 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:12,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1226614572, now seen corresponding path program 694 times [2021-06-05 05:09:12,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:12,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922069811] [2021-06-05 05:09:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:12,360 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:12,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:12,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922069811] [2021-06-05 05:09:12,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922069811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:12,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824090794] [2021-06-05 05:09:12,361 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 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 [2021-06-05 05:09:12,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:12,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:12,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:12,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:12,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:12,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:12,526 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 16 treesize of output 12 [2021-06-05 05:09:12,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:12,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:12,529 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 15 treesize of output 11 [2021-06-05 05:09:12,530 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:12,551 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:12,551 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:12,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:12,552 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:12,575 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:12,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824090794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:12,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:12,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:12,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312989159] [2021-06-05 05:09:12,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:12,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:12,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:12,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:12,575 INFO L87 Difference]: Start difference. First operand 178 states and 400 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) [2021-06-05 05:09:12,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:12,790 INFO L93 Difference]: Finished difference Result 287 states and 615 transitions. [2021-06-05 05:09:12,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:12,790 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 [2021-06-05 05:09:12,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:12,790 INFO L225 Difference]: With dead ends: 287 [2021-06-05 05:09:12,790 INFO L226 Difference]: Without dead ends: 287 [2021-06-05 05:09:12,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:12,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-06-05 05:09:12,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 178. [2021-06-05 05:09:12,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.2598870056497176) internal successors, (400), 177 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:12,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 400 transitions. [2021-06-05 05:09:12,792 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 400 transitions. Word has length 19 [2021-06-05 05:09:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:12,792 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 400 transitions. [2021-06-05 05:09:12,792 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) [2021-06-05 05:09:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 400 transitions. [2021-06-05 05:09:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:12,793 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:12,793 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:12,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17279,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:12,993 INFO L430 AbstractCegarLoop]: === Iteration 716 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:12,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:12,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1096058583, now seen corresponding path program 695 times [2021-06-05 05:09:12,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:12,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496633885] [2021-06-05 05:09:12,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:12,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:13,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:13,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:13,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496633885] [2021-06-05 05:09:13,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496633885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:13,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728228529] [2021-06-05 05:09:13,077 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 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 [2021-06-05 05:09:13,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:09:13,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:13,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:13,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:13,396 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:13,397 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:13,397 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 15 treesize of output 11 [2021-06-05 05:09:13,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:13,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:09:13,400 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:13,437 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:09:13,437 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:13,439 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 [2021-06-05 05:09:13,440 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:13,454 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:13,454 INFO L518 ElimStorePlain]: Eliminatee v_prenex_786 vanished before elimination [2021-06-05 05:09:13,455 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:13,455 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:09:13,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:13,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728228529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:13,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:13,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:13,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263164265] [2021-06-05 05:09:13,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:13,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:13,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:13,485 INFO L87 Difference]: Start difference. First operand 178 states and 400 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) [2021-06-05 05:09:13,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:13,740 INFO L93 Difference]: Finished difference Result 274 states and 586 transitions. [2021-06-05 05:09:13,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:09:13,740 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 [2021-06-05 05:09:13,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:13,741 INFO L225 Difference]: With dead ends: 274 [2021-06-05 05:09:13,741 INFO L226 Difference]: Without dead ends: 268 [2021-06-05 05:09:13,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:13,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-06-05 05:09:13,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 177. [2021-06-05 05:09:13,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.2556818181818183) internal successors, (397), 176 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) [2021-06-05 05:09:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 397 transitions. [2021-06-05 05:09:13,743 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 397 transitions. Word has length 19 [2021-06-05 05:09:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:13,743 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 397 transitions. [2021-06-05 05:09:13,743 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) [2021-06-05 05:09:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 397 transitions. [2021-06-05 05:09:13,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:13,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:13,743 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:13,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17283 [2021-06-05 05:09:13,943 INFO L430 AbstractCegarLoop]: === Iteration 717 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:13,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:13,943 INFO L82 PathProgramCache]: Analyzing trace with hash -186378774, now seen corresponding path program 696 times [2021-06-05 05:09:13,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:13,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839826717] [2021-06-05 05:09:13,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:14,025 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:14,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:14,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839826717] [2021-06-05 05:09:14,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839826717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:14,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319174091] [2021-06-05 05:09:14,026 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 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 [2021-06-05 05:09:14,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:09:14,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:14,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:14,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:14,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:14,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:14,182 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 16 treesize of output 12 [2021-06-05 05:09:14,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:14,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:14,185 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 15 treesize of output 11 [2021-06-05 05:09:14,186 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:14,206 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:14,207 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:14,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:14,207 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:14,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319174091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:14,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:14,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:14,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068407219] [2021-06-05 05:09:14,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:14,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:14,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:14,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:14,231 INFO L87 Difference]: Start difference. First operand 177 states and 397 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) [2021-06-05 05:09:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:14,433 INFO L93 Difference]: Finished difference Result 282 states and 602 transitions. [2021-06-05 05:09:14,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:14,434 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 [2021-06-05 05:09:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:14,434 INFO L225 Difference]: With dead ends: 282 [2021-06-05 05:09:14,434 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 05:09:14,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:14,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 05:09:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 173. [2021-06-05 05:09:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:14,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 05:09:14,436 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 05:09:14,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:14,436 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 05:09:14,436 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) [2021-06-05 05:09:14,436 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 05:09:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:14,436 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:14,436 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:14,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17309 [2021-06-05 05:09:14,637 INFO L430 AbstractCegarLoop]: === Iteration 718 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:14,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:14,637 INFO L82 PathProgramCache]: Analyzing trace with hash -232638837, now seen corresponding path program 697 times [2021-06-05 05:09:14,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:14,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938548317] [2021-06-05 05:09:14,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:14,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:14,725 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:14,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938548317] [2021-06-05 05:09:14,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938548317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:14,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798011932] [2021-06-05 05:09:14,725 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 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 [2021-06-05 05:09:14,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:14,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:15,051 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:09:15,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:15,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:15,055 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 15 treesize of output 11 [2021-06-05 05:09:15,055 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:15,090 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:09:15,090 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:15,092 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 [2021-06-05 05:09:15,093 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:15,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:15,106 INFO L518 ElimStorePlain]: Eliminatee v_prenex_792 vanished before elimination [2021-06-05 05:09:15,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:15,107 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:09:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:15,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798011932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:15,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:15,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:15,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111273688] [2021-06-05 05:09:15,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:15,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:15,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:15,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:15,136 INFO L87 Difference]: Start difference. First operand 173 states and 384 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) [2021-06-05 05:09:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:15,392 INFO L93 Difference]: Finished difference Result 267 states and 567 transitions. [2021-06-05 05:09:15,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:09:15,392 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 [2021-06-05 05:09:15,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:15,393 INFO L225 Difference]: With dead ends: 267 [2021-06-05 05:09:15,393 INFO L226 Difference]: Without dead ends: 259 [2021-06-05 05:09:15,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 360.3ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:15,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2021-06-05 05:09:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2021-06-05 05:09:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-05 05:09:15,394 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-06-05 05:09:15,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:15,395 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-05 05:09:15,395 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) [2021-06-05 05:09:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-05 05:09:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:15,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:15,395 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:15,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 701 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17313 [2021-06-05 05:09:15,595 INFO L430 AbstractCegarLoop]: === Iteration 719 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:15,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 2019085248, now seen corresponding path program 698 times [2021-06-05 05:09:15,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:15,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989582517] [2021-06-05 05:09:15,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:15,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:15,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:15,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:15,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989582517] [2021-06-05 05:09:15,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989582517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:15,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034364730] [2021-06-05 05:09:15,684 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 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 [2021-06-05 05:09:15,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:15,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:15,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:15,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:15,855 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 [2021-06-05 05:09:15,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:15,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:15,858 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 15 treesize of output 11 [2021-06-05 05:09:15,859 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:15,888 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:09:15,888 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:15,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:15,889 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:09:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:15,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034364730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:15,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:15,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:15,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280258015] [2021-06-05 05:09:15,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:15,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:15,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:15,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:15,940 INFO L87 Difference]: Start difference. First operand 172 states and 381 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) [2021-06-05 05:09:16,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:16,472 INFO L93 Difference]: Finished difference Result 300 states and 624 transitions. [2021-06-05 05:09:16,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:09:16,472 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 19 [2021-06-05 05:09:16,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:16,473 INFO L225 Difference]: With dead ends: 300 [2021-06-05 05:09:16,473 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 05:09:16,473 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:09:16,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 05:09:16,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 176. [2021-06-05 05:09:16,474 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) [2021-06-05 05:09:16,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 05:09:16,474 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 05:09:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:16,475 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 05:09:16,475 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) [2021-06-05 05:09:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 05:09:16,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:16,475 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:16,475 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:16,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17339,702 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:16,675 INFO L430 AbstractCegarLoop]: === Iteration 720 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:16,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:16,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1765929983, now seen corresponding path program 699 times [2021-06-05 05:09:16,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:16,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597886675] [2021-06-05 05:09:16,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:16,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:16,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:16,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:16,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597886675] [2021-06-05 05:09:16,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597886675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:16,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255333638] [2021-06-05 05:09:16,762 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 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 [2021-06-05 05:09:16,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:09:16,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:16,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:16,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:16,977 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 [2021-06-05 05:09:16,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:16,980 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:16,980 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 16 treesize of output 12 [2021-06-05 05:09:16,981 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:17,021 INFO L628 ElimStorePlain]: treesize reduction 56, result has 42.9 percent of original size [2021-06-05 05:09:17,022 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:17,024 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 [2021-06-05 05:09:17,024 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:17,038 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:17,038 INFO L518 ElimStorePlain]: Eliminatee v_prenex_795 vanished before elimination [2021-06-05 05:09:17,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:17,039 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:09:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:17,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [255333638] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:17,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:17,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:17,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065281305] [2021-06-05 05:09:17,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:17,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:17,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:17,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:17,095 INFO L87 Difference]: Start difference. First operand 176 states and 393 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) [2021-06-05 05:09:17,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:17,598 INFO L93 Difference]: Finished difference Result 362 states and 758 transitions. [2021-06-05 05:09:17,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:09:17,598 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 [2021-06-05 05:09:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:17,599 INFO L225 Difference]: With dead ends: 362 [2021-06-05 05:09:17,599 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 05:09:17,599 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:09:17,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 05:09:17,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 176. [2021-06-05 05:09:17,600 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) [2021-06-05 05:09:17,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 05:09:17,601 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 05:09:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:17,601 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 05:09:17,601 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) [2021-06-05 05:09:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 05:09:17,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:17,601 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:17,601 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:17,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17349,703 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:17,802 INFO L430 AbstractCegarLoop]: === Iteration 721 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:17,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1318592260, now seen corresponding path program 700 times [2021-06-05 05:09:17,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:17,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062474547] [2021-06-05 05:09:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:17,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:17,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:17,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:17,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062474547] [2021-06-05 05:09:17,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062474547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:17,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762860051] [2021-06-05 05:09:17,888 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 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 [2021-06-05 05:09:17,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:17,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:17,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:17,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:18,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:18,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:18,060 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 16 treesize of output 12 [2021-06-05 05:09:18,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:18,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:18,063 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 15 treesize of output 11 [2021-06-05 05:09:18,063 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:18,088 INFO L628 ElimStorePlain]: treesize reduction 31, result has 45.6 percent of original size [2021-06-05 05:09:18,088 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:18,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:18,089 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:71, output treesize:18 [2021-06-05 05:09:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:18,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762860051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:18,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:18,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:18,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017522340] [2021-06-05 05:09:18,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:18,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:18,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:18,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:18,133 INFO L87 Difference]: Start difference. First operand 176 states and 393 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) [2021-06-05 05:09:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:18,569 INFO L93 Difference]: Finished difference Result 303 states and 633 transitions. [2021-06-05 05:09:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:09:18,569 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 [2021-06-05 05:09:18,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:18,569 INFO L225 Difference]: With dead ends: 303 [2021-06-05 05:09:18,569 INFO L226 Difference]: Without dead ends: 303 [2021-06-05 05:09:18,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:09:18,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-06-05 05:09:18,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 176. [2021-06-05 05:09:18,571 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) [2021-06-05 05:09:18,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 393 transitions. [2021-06-05 05:09:18,571 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 393 transitions. Word has length 19 [2021-06-05 05:09:18,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:18,571 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 393 transitions. [2021-06-05 05:09:18,571 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) [2021-06-05 05:09:18,571 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 393 transitions. [2021-06-05 05:09:18,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:18,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:18,572 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:18,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17360,704 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:18,772 INFO L430 AbstractCegarLoop]: === Iteration 722 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:18,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:18,772 INFO L82 PathProgramCache]: Analyzing trace with hash -664204985, now seen corresponding path program 701 times [2021-06-05 05:09:18,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:18,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824176121] [2021-06-05 05:09:18,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:18,855 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:18,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:18,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824176121] [2021-06-05 05:09:18,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824176121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:18,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418836821] [2021-06-05 05:09:18,855 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 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 [2021-06-05 05:09:18,882 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:09:18,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:18,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:18,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:19,081 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 [2021-06-05 05:09:19,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:19,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:19,084 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 15 treesize of output 11 [2021-06-05 05:09:19,085 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:19,125 INFO L628 ElimStorePlain]: treesize reduction 56, result has 43.4 percent of original size [2021-06-05 05:09:19,125 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:19,127 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 [2021-06-05 05:09:19,128 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:19,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:19,141 INFO L518 ElimStorePlain]: Eliminatee v_prenex_798 vanished before elimination [2021-06-05 05:09:19,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 05:09:19,142 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:113, output treesize:19 [2021-06-05 05:09:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:19,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418836821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:19,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:19,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:19,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264074335] [2021-06-05 05:09:19,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:19,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:19,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:19,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:19,216 INFO L87 Difference]: Start difference. First operand 176 states and 393 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) [2021-06-05 05:09:20,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:20,148 INFO L93 Difference]: Finished difference Result 364 states and 759 transitions. [2021-06-05 05:09:20,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:09:20,149 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 [2021-06-05 05:09:20,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:20,149 INFO L225 Difference]: With dead ends: 364 [2021-06-05 05:09:20,149 INFO L226 Difference]: Without dead ends: 362 [2021-06-05 05:09:20,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=158, Invalid=834, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:09:20,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-06-05 05:09:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 175. [2021-06-05 05:09:20,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 05:09:20,151 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 05:09:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:20,151 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 05:09:20,151 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) [2021-06-05 05:09:20,151 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 05:09:20,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:20,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:20,151 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:20,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 705 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17368 [2021-06-05 05:09:20,352 INFO L430 AbstractCegarLoop]: === Iteration 723 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:20,352 INFO L82 PathProgramCache]: Analyzing trace with hash 783362458, now seen corresponding path program 702 times [2021-06-05 05:09:20,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:20,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5611486] [2021-06-05 05:09:20,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:20,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:20,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5611486] [2021-06-05 05:09:20,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5611486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:20,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053554472] [2021-06-05 05:09:20,442 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 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 [2021-06-05 05:09:20,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:09:20,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:20,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:20,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:20,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:20,624 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:20,624 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 16 treesize of output 12 [2021-06-05 05:09:20,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:20,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:20,627 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 15 treesize of output 11 [2021-06-05 05:09:20,627 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:20,648 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:20,648 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:20,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:20,649 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:20,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053554472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:20,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:20,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:20,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317359976] [2021-06-05 05:09:20,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:20,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:20,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:20,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:20,672 INFO L87 Difference]: Start difference. First operand 175 states and 390 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) [2021-06-05 05:09:20,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:20,870 INFO L93 Difference]: Finished difference Result 282 states and 599 transitions. [2021-06-05 05:09:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:20,870 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 [2021-06-05 05:09:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:20,871 INFO L225 Difference]: With dead ends: 282 [2021-06-05 05:09:20,871 INFO L226 Difference]: Without dead ends: 282 [2021-06-05 05:09:20,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 236.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:09:20,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-06-05 05:09:20,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 175. [2021-06-05 05:09:20,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.2413793103448274) internal successors, (390), 174 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:20,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 390 transitions. [2021-06-05 05:09:20,873 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 390 transitions. Word has length 19 [2021-06-05 05:09:20,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:20,873 INFO L482 AbstractCegarLoop]: Abstraction has 175 states and 390 transitions. [2021-06-05 05:09:20,873 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) [2021-06-05 05:09:20,873 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 390 transitions. [2021-06-05 05:09:20,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:20,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:20,873 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:21,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 706 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17388 [2021-06-05 05:09:21,073 INFO L430 AbstractCegarLoop]: === Iteration 724 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 411506171, now seen corresponding path program 703 times [2021-06-05 05:09:21,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:21,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708490772] [2021-06-05 05:09:21,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:21,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:21,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708490772] [2021-06-05 05:09:21,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708490772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:21,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044963960] [2021-06-05 05:09:21,170 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 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 [2021-06-05 05:09:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:21,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:21,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:21,498 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:09:21,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:21,501 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:21,502 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 15 treesize of output 11 [2021-06-05 05:09:21,502 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:21,537 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:09:21,540 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 [2021-06-05 05:09:21,540 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:21,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:21,553 INFO L518 ElimStorePlain]: Eliminatee v_prenex_804 vanished before elimination [2021-06-05 05:09:21,553 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:21,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:21,554 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:09:21,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:21,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044963960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:21,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:21,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:21,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383156224] [2021-06-05 05:09:21,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:21,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:21,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:21,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:21,583 INFO L87 Difference]: Start difference. First operand 175 states and 390 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) [2021-06-05 05:09:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:22,054 INFO L93 Difference]: Finished difference Result 356 states and 741 transitions. [2021-06-05 05:09:22,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:09:22,054 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 [2021-06-05 05:09:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:22,055 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:09:22,055 INFO L226 Difference]: Without dead ends: 352 [2021-06-05 05:09:22,055 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 543.9ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:09:22,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-06-05 05:09:22,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 174. [2021-06-05 05:09:22,057 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) [2021-06-05 05:09:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 05:09:22,057 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 05:09:22,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:22,057 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 05:09:22,057 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) [2021-06-05 05:09:22,057 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 05:09:22,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:22,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:22,057 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:22,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 707 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17392 [2021-06-05 05:09:22,258 INFO L430 AbstractCegarLoop]: === Iteration 725 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:22,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:22,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1371107780, now seen corresponding path program 704 times [2021-06-05 05:09:22,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:22,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033445823] [2021-06-05 05:09:22,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:22,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:22,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033445823] [2021-06-05 05:09:22,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033445823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:22,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421289300] [2021-06-05 05:09:22,344 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 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 [2021-06-05 05:09:22,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:22,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:22,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:22,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:22,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:22,518 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 15 treesize of output 11 [2021-06-05 05:09:22,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:22,520 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:22,521 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 16 treesize of output 12 [2021-06-05 05:09:22,521 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:22,542 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:22,542 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:22,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:22,543 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:22,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421289300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:22,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:22,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:22,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793835942] [2021-06-05 05:09:22,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:22,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:22,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:22,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:22,566 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) [2021-06-05 05:09:22,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:22,818 INFO L93 Difference]: Finished difference Result 283 states and 602 transitions. [2021-06-05 05:09:22,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:22,818 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 [2021-06-05 05:09:22,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:22,818 INFO L225 Difference]: With dead ends: 283 [2021-06-05 05:09:22,818 INFO L226 Difference]: Without dead ends: 283 [2021-06-05 05:09:22,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 245.1ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-06-05 05:09:22,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 174. [2021-06-05 05:09:22,820 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) [2021-06-05 05:09:22,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 387 transitions. [2021-06-05 05:09:22,820 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 387 transitions. Word has length 19 [2021-06-05 05:09:22,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:22,820 INFO L482 AbstractCegarLoop]: Abstraction has 174 states and 387 transitions. [2021-06-05 05:09:22,820 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) [2021-06-05 05:09:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 387 transitions. [2021-06-05 05:09:22,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:22,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:22,821 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:23,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17408,708 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:23,021 INFO L430 AbstractCegarLoop]: === Iteration 726 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:23,021 INFO L82 PathProgramCache]: Analyzing trace with hash -601186361, now seen corresponding path program 705 times [2021-06-05 05:09:23,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:23,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136750146] [2021-06-05 05:09:23,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:23,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:23,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:23,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136750146] [2021-06-05 05:09:23,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136750146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:23,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282927591] [2021-06-05 05:09:23,107 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 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 [2021-06-05 05:09:23,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:23,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:23,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:23,405 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:09:23,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:23,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:23,409 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 15 treesize of output 11 [2021-06-05 05:09:23,409 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:23,444 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:09:23,445 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:23,447 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 [2021-06-05 05:09:23,448 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:23,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:23,461 INFO L518 ElimStorePlain]: Eliminatee v_prenex_808 vanished before elimination [2021-06-05 05:09:23,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:23,461 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:09:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:23,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282927591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:23,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:23,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:23,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75404997] [2021-06-05 05:09:23,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:23,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:23,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:23,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:23,491 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) [2021-06-05 05:09:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:24,014 INFO L93 Difference]: Finished difference Result 356 states and 739 transitions. [2021-06-05 05:09:24,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:09:24,014 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 [2021-06-05 05:09:24,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:24,015 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:09:24,015 INFO L226 Difference]: Without dead ends: 350 [2021-06-05 05:09:24,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 532.9ms TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:09:24,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-06-05 05:09:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 173. [2021-06-05 05:09:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 05:09:24,017 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 05:09:24,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:24,017 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 05:09:24,017 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) [2021-06-05 05:09:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 05:09:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:24,017 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:24,017 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:24,217 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 709 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17412 [2021-06-05 05:09:24,217 INFO L430 AbstractCegarLoop]: === Iteration 727 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:24,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1883623718, now seen corresponding path program 706 times [2021-06-05 05:09:24,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:24,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108914452] [2021-06-05 05:09:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:24,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:24,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:24,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:24,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108914452] [2021-06-05 05:09:24,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108914452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:24,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710958716] [2021-06-05 05:09:24,303 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 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 [2021-06-05 05:09:24,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:24,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:24,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:24,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:24,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:24,465 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 16 treesize of output 12 [2021-06-05 05:09:24,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:24,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:24,468 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 15 treesize of output 11 [2021-06-05 05:09:24,469 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:24,489 INFO L628 ElimStorePlain]: treesize reduction 37, result has 37.3 percent of original size [2021-06-05 05:09:24,489 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:24,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:09:24,490 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:73, output treesize:12 [2021-06-05 05:09:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:24,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710958716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:24,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:24,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:24,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404432921] [2021-06-05 05:09:24,512 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:24,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:24,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:24,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:24,513 INFO L87 Difference]: Start difference. First operand 173 states and 384 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) [2021-06-05 05:09:24,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:24,775 INFO L93 Difference]: Finished difference Result 284 states and 605 transitions. [2021-06-05 05:09:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:24,775 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 [2021-06-05 05:09:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:24,775 INFO L225 Difference]: With dead ends: 284 [2021-06-05 05:09:24,775 INFO L226 Difference]: Without dead ends: 284 [2021-06-05 05:09:24,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:24,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-06-05 05:09:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 173. [2021-06-05 05:09:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.2325581395348837) internal successors, (384), 172 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:24,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 384 transitions. [2021-06-05 05:09:24,777 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 384 transitions. Word has length 19 [2021-06-05 05:09:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:24,777 INFO L482 AbstractCegarLoop]: Abstraction has 173 states and 384 transitions. [2021-06-05 05:09:24,777 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) [2021-06-05 05:09:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 384 transitions. [2021-06-05 05:09:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:24,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:24,778 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:24,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17439,710 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:24,978 INFO L430 AbstractCegarLoop]: === Iteration 728 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:24,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:24,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1929883781, now seen corresponding path program 707 times [2021-06-05 05:09:24,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:24,978 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362139457] [2021-06-05 05:09:24,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:25,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:25,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:25,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362139457] [2021-06-05 05:09:25,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362139457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:25,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827909355] [2021-06-05 05:09:25,067 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 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 [2021-06-05 05:09:25,094 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:09:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:25,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:25,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:25,398 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:25,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:25,399 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 15 treesize of output 11 [2021-06-05 05:09:25,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:25,402 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:09:25,402 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:25,436 INFO L628 ElimStorePlain]: treesize reduction 37, result has 53.8 percent of original size [2021-06-05 05:09:25,438 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 [2021-06-05 05:09:25,439 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:25,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:25,452 INFO L518 ElimStorePlain]: Eliminatee v_prenex_814 vanished before elimination [2021-06-05 05:09:25,452 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:25,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 4 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:25,453 INFO L247 ElimStorePlain]: Needed 4 recursive calls to eliminate 6 variables, input treesize:110, output treesize:20 [2021-06-05 05:09:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:25,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827909355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:25,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:25,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-06-05 05:09:25,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444074607] [2021-06-05 05:09:25,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:09:25,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:09:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:09:25,484 INFO L87 Difference]: Start difference. First operand 173 states and 384 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) [2021-06-05 05:09:25,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:25,960 INFO L93 Difference]: Finished difference Result 356 states and 737 transitions. [2021-06-05 05:09:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:09:25,960 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 [2021-06-05 05:09:25,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:25,960 INFO L225 Difference]: With dead ends: 356 [2021-06-05 05:09:25,960 INFO L226 Difference]: Without dead ends: 348 [2021-06-05 05:09:25,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:09:25,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-06-05 05:09:25,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 172. [2021-06-05 05:09:25,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.2280701754385963) internal successors, (381), 171 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:25,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 381 transitions. [2021-06-05 05:09:25,962 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 381 transitions. Word has length 19 [2021-06-05 05:09:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:25,962 INFO L482 AbstractCegarLoop]: Abstraction has 172 states and 381 transitions. [2021-06-05 05:09:25,962 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) [2021-06-05 05:09:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 381 transitions. [2021-06-05 05:09:25,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:25,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:25,963 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:26,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 711 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17443 [2021-06-05 05:09:26,163 INFO L430 AbstractCegarLoop]: === Iteration 729 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:26,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:26,163 INFO L82 PathProgramCache]: Analyzing trace with hash -968542230, now seen corresponding path program 708 times [2021-06-05 05:09:26,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:26,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903090124] [2021-06-05 05:09:26,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:26,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:26,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:26,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903090124] [2021-06-05 05:09:26,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903090124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:26,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78971934] [2021-06-05 05:09:26,246 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 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 [2021-06-05 05:09:26,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:09:26,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:26,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:26,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:26,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:26,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78971934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:26,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:26,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 05:09:26,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738390270] [2021-06-05 05:09:26,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:09:26,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:26,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:09:26,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:09:26,406 INFO L87 Difference]: Start difference. First operand 172 states and 381 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) [2021-06-05 05:09:26,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:26,646 INFO L93 Difference]: Finished difference Result 366 states and 757 transitions. [2021-06-05 05:09:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:09:26,646 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 [2021-06-05 05:09:26,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:26,646 INFO L225 Difference]: With dead ends: 366 [2021-06-05 05:09:26,646 INFO L226 Difference]: Without dead ends: 366 [2021-06-05 05:09:26,646 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 269.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:26,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-06-05 05:09:26,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 166. [2021-06-05 05:09:26,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.212121212121212) internal successors, (365), 165 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:26,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 365 transitions. [2021-06-05 05:09:26,648 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 365 transitions. Word has length 19 [2021-06-05 05:09:26,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:26,648 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 365 transitions. [2021-06-05 05:09:26,648 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) [2021-06-05 05:09:26,649 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 365 transitions. [2021-06-05 05:09:26,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 05:09:26,649 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:26,649 INFO L521 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:26,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 712 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17459 [2021-06-05 05:09:26,849 INFO L430 AbstractCegarLoop]: === Iteration 730 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1437288019, now seen corresponding path program 709 times [2021-06-05 05:09:26,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:26,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382313496] [2021-06-05 05:09:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:26,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382313496] [2021-06-05 05:09:26,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382313496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:26,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662487366] [2021-06-05 05:09:26,934 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 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 [2021-06-05 05:09:26,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:26,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:09:26,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:27,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662487366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:27,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:27,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-05 05:09:27,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883855863] [2021-06-05 05:09:27,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:09:27,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:27,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:09:27,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:09:27,123 INFO L87 Difference]: Start difference. First operand 166 states and 365 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) [2021-06-05 05:09:27,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:27,471 INFO L93 Difference]: Finished difference Result 331 states and 692 transitions. [2021-06-05 05:09:27,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:09:27,471 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 [2021-06-05 05:09:27,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:27,472 INFO L225 Difference]: With dead ends: 331 [2021-06-05 05:09:27,472 INFO L226 Difference]: Without dead ends: 321 [2021-06-05 05:09:27,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 393.7ms TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:09:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-06-05 05:09:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 166. [2021-06-05 05:09:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 2.206060606060606) internal successors, (364), 165 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) [2021-06-05 05:09:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 364 transitions. [2021-06-05 05:09:27,474 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 364 transitions. Word has length 19 [2021-06-05 05:09:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:27,474 INFO L482 AbstractCegarLoop]: Abstraction has 166 states and 364 transitions. [2021-06-05 05:09:27,474 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) [2021-06-05 05:09:27,474 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 364 transitions. [2021-06-05 05:09:27,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:27,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:27,474 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:27,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17462,713 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:27,674 INFO L430 AbstractCegarLoop]: === Iteration 731 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1380416285, now seen corresponding path program 710 times [2021-06-05 05:09:27,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:27,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510829010] [2021-06-05 05:09:27,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:27,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:27,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510829010] [2021-06-05 05:09:27,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510829010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:27,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909427009] [2021-06-05 05:09:27,976 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 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 [2021-06-05 05:09:28,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:28,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:28,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:28,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:28,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909427009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:28,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:28,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:09:28,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182993427] [2021-06-05 05:09:28,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:28,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:28,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:28,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:28,303 INFO L87 Difference]: Start difference. First operand 166 states and 364 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) [2021-06-05 05:09:29,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:29,020 INFO L93 Difference]: Finished difference Result 457 states and 959 transitions. [2021-06-05 05:09:29,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:29,021 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 20 [2021-06-05 05:09:29,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:29,021 INFO L225 Difference]: With dead ends: 457 [2021-06-05 05:09:29,021 INFO L226 Difference]: Without dead ends: 450 [2021-06-05 05:09:29,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1009.8ms TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:09:29,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2021-06-05 05:09:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 176. [2021-06-05 05:09:29,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 2.1885714285714286) internal successors, (383), 175 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) [2021-06-05 05:09:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 383 transitions. [2021-06-05 05:09:29,023 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 383 transitions. Word has length 20 [2021-06-05 05:09:29,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:29,023 INFO L482 AbstractCegarLoop]: Abstraction has 176 states and 383 transitions. [2021-06-05 05:09:29,023 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) [2021-06-05 05:09:29,023 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 383 transitions. [2021-06-05 05:09:29,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:29,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:29,024 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:29,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 714 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17468 [2021-06-05 05:09:29,224 INFO L430 AbstractCegarLoop]: === Iteration 732 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:29,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1059407069, now seen corresponding path program 711 times [2021-06-05 05:09:29,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:29,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669808160] [2021-06-05 05:09:29,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:29,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669808160] [2021-06-05 05:09:29,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669808160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:29,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230527494] [2021-06-05 05:09:29,557 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 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 [2021-06-05 05:09:29,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:29,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:29,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:29,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:29,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:29,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230527494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:29,831 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:29,831 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:09:29,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923903938] [2021-06-05 05:09:29,831 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:29,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:29,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:29,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:29,832 INFO L87 Difference]: Start difference. First operand 176 states and 383 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) [2021-06-05 05:09:30,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:30,359 INFO L93 Difference]: Finished difference Result 461 states and 967 transitions. [2021-06-05 05:09:30,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:30,359 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 20 [2021-06-05 05:09:30,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:30,360 INFO L225 Difference]: With dead ends: 461 [2021-06-05 05:09:30,360 INFO L226 Difference]: Without dead ends: 454 [2021-06-05 05:09:30,360 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 810.8ms TimeCoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:09:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-06-05 05:09:30,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 177. [2021-06-05 05:09:30,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 2.1931818181818183) internal successors, (386), 176 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) [2021-06-05 05:09:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 386 transitions. [2021-06-05 05:09:30,362 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 386 transitions. Word has length 20 [2021-06-05 05:09:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:30,362 INFO L482 AbstractCegarLoop]: Abstraction has 177 states and 386 transitions. [2021-06-05 05:09:30,362 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) [2021-06-05 05:09:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 386 transitions. [2021-06-05 05:09:30,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:30,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:30,362 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:30,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 715 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17479 [2021-06-05 05:09:30,563 INFO L430 AbstractCegarLoop]: === Iteration 733 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:30,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:30,563 INFO L82 PathProgramCache]: Analyzing trace with hash -199921313, now seen corresponding path program 712 times [2021-06-05 05:09:30,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:30,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984417554] [2021-06-05 05:09:30,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:30,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:30,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984417554] [2021-06-05 05:09:30,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984417554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:30,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948208813] [2021-06-05 05:09:30,760 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 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 [2021-06-05 05:09:30,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:30,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:30,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:31,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948208813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:31,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:31,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 05:09:31,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976127648] [2021-06-05 05:09:31,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:09:31,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:31,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:09:31,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:09:31,026 INFO L87 Difference]: Start difference. First operand 177 states and 386 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) [2021-06-05 05:09:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:31,540 INFO L93 Difference]: Finished difference Result 462 states and 970 transitions. [2021-06-05 05:09:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:31,540 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 [2021-06-05 05:09:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:31,540 INFO L225 Difference]: With dead ends: 462 [2021-06-05 05:09:31,540 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 05:09:31,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 658.1ms TimeCoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:09:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 05:09:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 178. [2021-06-05 05:09:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.1977401129943503) internal successors, (389), 177 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) [2021-06-05 05:09:31,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 389 transitions. [2021-06-05 05:09:31,542 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 389 transitions. Word has length 20 [2021-06-05 05:09:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:31,543 INFO L482 AbstractCegarLoop]: Abstraction has 178 states and 389 transitions. [2021-06-05 05:09:31,543 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) [2021-06-05 05:09:31,543 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 389 transitions. [2021-06-05 05:09:31,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:31,543 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:31,543 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:31,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17490,716 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:31,743 INFO L430 AbstractCegarLoop]: === Iteration 734 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:31,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:31,743 INFO L82 PathProgramCache]: Analyzing trace with hash 936182691, now seen corresponding path program 713 times [2021-06-05 05:09:31,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:31,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882024997] [2021-06-05 05:09:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:31,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:31,937 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:31,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882024997] [2021-06-05 05:09:31,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882024997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:31,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956780529] [2021-06-05 05:09:31,937 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 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 [2021-06-05 05:09:31,965 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:09:31,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:31,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:31,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:32,192 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:32,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956780529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:32,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:32,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 05:09:32,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481438617] [2021-06-05 05:09:32,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:09:32,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:32,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:09:32,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:09:32,193 INFO L87 Difference]: Start difference. First operand 178 states and 389 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) [2021-06-05 05:09:32,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:32,586 INFO L93 Difference]: Finished difference Result 463 states and 973 transitions. [2021-06-05 05:09:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:32,586 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 [2021-06-05 05:09:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:32,587 INFO L225 Difference]: With dead ends: 463 [2021-06-05 05:09:32,587 INFO L226 Difference]: Without dead ends: 456 [2021-06-05 05:09:32,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 556.1ms TimeCoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:09:32,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-06-05 05:09:32,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 179. [2021-06-05 05:09:32,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.202247191011236) internal successors, (392), 178 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) [2021-06-05 05:09:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 392 transitions. [2021-06-05 05:09:32,589 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 392 transitions. Word has length 20 [2021-06-05 05:09:32,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:32,589 INFO L482 AbstractCegarLoop]: Abstraction has 179 states and 392 transitions. [2021-06-05 05:09:32,589 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) [2021-06-05 05:09:32,589 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 392 transitions. [2021-06-05 05:09:32,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:32,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:32,589 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:32,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 717 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17500 [2021-06-05 05:09:32,790 INFO L430 AbstractCegarLoop]: === Iteration 735 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:32,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:32,790 INFO L82 PathProgramCache]: Analyzing trace with hash 695736543, now seen corresponding path program 714 times [2021-06-05 05:09:32,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:32,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729200073] [2021-06-05 05:09:32,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:32,991 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:32,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:32,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729200073] [2021-06-05 05:09:32,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729200073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:32,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765961279] [2021-06-05 05:09:32,992 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 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 [2021-06-05 05:09:33,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:09:33,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:33,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:33,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:33,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-06-05 05:09:33,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,730 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 30 treesize of output 22 [2021-06-05 05:09:33,731 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:33,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,737 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 30 treesize of output 22 [2021-06-05 05:09:33,738 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:09:33,745 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:33,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:09:33,752 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:33,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:33,758 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 37 treesize of output 27 [2021-06-05 05:09:33,759 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:33,948 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-06-05 05:09:33,948 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-06-05 05:09:33,951 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 7 treesize of output 5 [2021-06-05 05:09:33,952 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:33,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:33,991 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:33,991 INFO L518 ElimStorePlain]: Eliminatee v_prenex_827 vanished before elimination [2021-06-05 05:09:33,994 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 7 treesize of output 5 [2021-06-05 05:09:33,995 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:34,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:34,033 INFO L518 ElimStorePlain]: Eliminatee v_prenex_829 vanished before elimination [2021-06-05 05:09:34,035 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 [2021-06-05 05:09:34,036 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:34,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:34,072 INFO L518 ElimStorePlain]: Eliminatee v_prenex_831 vanished before elimination [2021-06-05 05:09:34,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:09:34,074 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:09:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:34,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765961279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:34,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:34,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:09:34,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517456858] [2021-06-05 05:09:34,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:34,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:34,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:34,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:34,182 INFO L87 Difference]: Start difference. First operand 179 states and 392 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) [2021-06-05 05:09:34,509 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 05:09:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:34,775 INFO L93 Difference]: Finished difference Result 464 states and 976 transitions. [2021-06-05 05:09:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:34,775 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 [2021-06-05 05:09:34,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:34,775 INFO L225 Difference]: With dead ends: 464 [2021-06-05 05:09:34,776 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 05:09:34,776 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 983.3ms TimeCoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:09:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 05:09:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 180. [2021-06-05 05:09:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.206703910614525) internal successors, (395), 179 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) [2021-06-05 05:09:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 395 transitions. [2021-06-05 05:09:34,778 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 395 transitions. Word has length 20 [2021-06-05 05:09:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:34,778 INFO L482 AbstractCegarLoop]: Abstraction has 180 states and 395 transitions. [2021-06-05 05:09:34,778 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) [2021-06-05 05:09:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 395 transitions. [2021-06-05 05:09:34,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:34,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:34,778 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:34,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17508,718 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:34,979 INFO L430 AbstractCegarLoop]: === Iteration 736 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:34,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:34,979 INFO L82 PathProgramCache]: Analyzing trace with hash -4756445, now seen corresponding path program 715 times [2021-06-05 05:09:34,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:34,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958111568] [2021-06-05 05:09:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:34,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:35,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:35,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:35,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958111568] [2021-06-05 05:09:35,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958111568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:35,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831353508] [2021-06-05 05:09:35,183 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 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 [2021-06-05 05:09:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:35,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:35,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:35,425 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:35,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [831353508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:35,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:35,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 05:09:35,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705921436] [2021-06-05 05:09:35,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:09:35,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:35,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:09:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:35,426 INFO L87 Difference]: Start difference. First operand 180 states and 395 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:09:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:35,904 INFO L93 Difference]: Finished difference Result 476 states and 995 transitions. [2021-06-05 05:09:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:35,904 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 20 [2021-06-05 05:09:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:35,905 INFO L225 Difference]: With dead ends: 476 [2021-06-05 05:09:35,905 INFO L226 Difference]: Without dead ends: 469 [2021-06-05 05:09:35,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 552.6ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:35,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-06-05 05:09:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 181. [2021-06-05 05:09:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 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) [2021-06-05 05:09:35,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-06-05 05:09:35,907 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-06-05 05:09:35,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:35,907 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-06-05 05:09:35,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:09:35,907 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-06-05 05:09:35,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:35,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:35,907 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:36,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 719 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17572 [2021-06-05 05:09:36,108 INFO L430 AbstractCegarLoop]: === Iteration 737 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:36,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:36,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1686828191, now seen corresponding path program 716 times [2021-06-05 05:09:36,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:36,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381641958] [2021-06-05 05:09:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:36,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:36,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:36,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381641958] [2021-06-05 05:09:36,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381641958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:36,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764416651] [2021-06-05 05:09:36,310 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 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 [2021-06-05 05:09:36,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:36,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:36,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764416651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:36,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:36,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-05 05:09:36,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005384080] [2021-06-05 05:09:36,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:09:36,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:36,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:09:36,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:09:36,558 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:09:36,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:36,996 INFO L93 Difference]: Finished difference Result 464 states and 977 transitions. [2021-06-05 05:09:36,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:36,996 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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 20 [2021-06-05 05:09:36,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:36,997 INFO L225 Difference]: With dead ends: 464 [2021-06-05 05:09:36,997 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 05:09:36,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 540.1ms TimeCoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 05:09:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 181. [2021-06-05 05:09:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 2.216666666666667) internal successors, (399), 180 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) [2021-06-05 05:09:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 399 transitions. [2021-06-05 05:09:36,999 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 399 transitions. Word has length 20 [2021-06-05 05:09:36,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:36,999 INFO L482 AbstractCegarLoop]: Abstraction has 181 states and 399 transitions. [2021-06-05 05:09:36,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 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) [2021-06-05 05:09:36,999 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 399 transitions. [2021-06-05 05:09:36,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:36,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:36,999 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:37,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17582,720 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:37,200 INFO L430 AbstractCegarLoop]: === Iteration 738 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:37,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1255361233, now seen corresponding path program 717 times [2021-06-05 05:09:37,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:37,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373416419] [2021-06-05 05:09:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:37,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:37,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373416419] [2021-06-05 05:09:37,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373416419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:37,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490057261] [2021-06-05 05:09:37,449 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 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 [2021-06-05 05:09:37,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:37,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:37,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:37,939 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:37,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490057261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:37,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:37,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:09:37,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445569892] [2021-06-05 05:09:37,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:37,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:37,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:37,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:37,940 INFO L87 Difference]: Start difference. First operand 181 states and 399 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:38,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:38,308 INFO L93 Difference]: Finished difference Result 346 states and 725 transitions. [2021-06-05 05:09:38,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:38,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:09:38,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:38,308 INFO L225 Difference]: With dead ends: 346 [2021-06-05 05:09:38,308 INFO L226 Difference]: Without dead ends: 339 [2021-06-05 05:09:38,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-06-05 05:09:38,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 183. [2021-06-05 05:09:38,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.21978021978022) internal successors, (404), 182 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) [2021-06-05 05:09:38,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 404 transitions. [2021-06-05 05:09:38,310 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 404 transitions. Word has length 20 [2021-06-05 05:09:38,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:38,311 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 404 transitions. [2021-06-05 05:09:38,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:38,311 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 404 transitions. [2021-06-05 05:09:38,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:38,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:38,311 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:38,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 721 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17591 [2021-06-05 05:09:38,511 INFO L430 AbstractCegarLoop]: === Iteration 739 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:38,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:38,512 INFO L82 PathProgramCache]: Analyzing trace with hash 2114846989, now seen corresponding path program 718 times [2021-06-05 05:09:38,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:38,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018517424] [2021-06-05 05:09:38,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:38,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:38,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:38,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018517424] [2021-06-05 05:09:38,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018517424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:38,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360907372] [2021-06-05 05:09:38,754 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 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 [2021-06-05 05:09:38,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:38,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:38,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:09:38,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:39,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,444 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 29 treesize of output 21 [2021-06-05 05:09:39,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,451 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:09:39,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,458 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:09:39,460 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,465 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,466 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 22 treesize of output 16 [2021-06-05 05:09:39,466 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,472 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 23 treesize of output 17 [2021-06-05 05:09:39,473 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,479 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 23 treesize of output 17 [2021-06-05 05:09:39,480 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,665 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 65 [2021-06-05 05:09:39,666 INFO L628 ElimStorePlain]: treesize reduction 913, result has 12.0 percent of original size [2021-06-05 05:09:39,669 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 [2021-06-05 05:09:39,670 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,711 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:39,711 INFO L518 ElimStorePlain]: Eliminatee v_prenex_846 vanished before elimination [2021-06-05 05:09:39,715 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 7 treesize of output 5 [2021-06-05 05:09:39,716 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:39,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:39,759 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 16 treesize of output 12 [2021-06-05 05:09:39,760 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:39,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:39,801 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:39,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_848 vanished before elimination [2021-06-05 05:09:39,801 INFO L518 ElimStorePlain]: Eliminatee v_prenex_843 vanished before elimination [2021-06-05 05:09:39,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:09:39,803 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:09:39,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:39,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360907372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:39,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:39,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:09:39,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366053860] [2021-06-05 05:09:39,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:39,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:39,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:39,914 INFO L87 Difference]: Start difference. First operand 183 states and 404 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:09:40,223 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 93 [2021-06-05 05:09:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:40,380 INFO L93 Difference]: Finished difference Result 350 states and 733 transitions. [2021-06-05 05:09:40,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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 20 [2021-06-05 05:09:40,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:40,381 INFO L225 Difference]: With dead ends: 350 [2021-06-05 05:09:40,381 INFO L226 Difference]: Without dead ends: 343 [2021-06-05 05:09:40,381 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 892.9ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:09:40,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-06-05 05:09:40,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 184. [2021-06-05 05:09:40,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.2240437158469946) internal successors, (407), 183 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) [2021-06-05 05:09:40,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 407 transitions. [2021-06-05 05:09:40,383 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 407 transitions. Word has length 20 [2021-06-05 05:09:40,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:40,383 INFO L482 AbstractCegarLoop]: Abstraction has 184 states and 407 transitions. [2021-06-05 05:09:40,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:09:40,383 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 407 transitions. [2021-06-05 05:09:40,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:40,383 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:40,383 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:40,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17637,722 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:40,584 INFO L430 AbstractCegarLoop]: === Iteration 740 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:40,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:40,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1044016303, now seen corresponding path program 719 times [2021-06-05 05:09:40,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:40,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234459042] [2021-06-05 05:09:40,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:40,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:40,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:40,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234459042] [2021-06-05 05:09:40,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234459042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:40,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529596559] [2021-06-05 05:09:40,796 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 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 [2021-06-05 05:09:40,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:09:40,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:40,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:40,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:41,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529596559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:41,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:41,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:09:41,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173330935] [2021-06-05 05:09:41,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:41,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:41,302 INFO L87 Difference]: Start difference. First operand 184 states and 407 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:41,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:41,656 INFO L93 Difference]: Finished difference Result 351 states and 736 transitions. [2021-06-05 05:09:41,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:41,656 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:09:41,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:41,656 INFO L225 Difference]: With dead ends: 351 [2021-06-05 05:09:41,657 INFO L226 Difference]: Without dead ends: 344 [2021-06-05 05:09:41,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 583.7ms TimeCoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:41,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-06-05 05:09:41,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 185. [2021-06-05 05:09:41,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.2282608695652173) internal successors, (410), 184 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) [2021-06-05 05:09:41,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 410 transitions. [2021-06-05 05:09:41,659 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 410 transitions. Word has length 20 [2021-06-05 05:09:41,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:41,659 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 410 transitions. [2021-06-05 05:09:41,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:41,659 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 410 transitions. [2021-06-05 05:09:41,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:41,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:41,659 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:41,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17684,723 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:41,859 INFO L430 AbstractCegarLoop]: === Iteration 741 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:41,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:41,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1284462451, now seen corresponding path program 720 times [2021-06-05 05:09:41,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:41,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86961605] [2021-06-05 05:09:41,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:42,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:42,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86961605] [2021-06-05 05:09:42,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86961605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:42,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678200081] [2021-06-05 05:09:42,059 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 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 [2021-06-05 05:09:42,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:09:42,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:42,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:09:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:42,732 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,733 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 37 treesize of output 27 [2021-06-05 05:09:42,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,741 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 31 treesize of output 23 [2021-06-05 05:09:42,742 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,748 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 31 treesize of output 23 [2021-06-05 05:09:42,749 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,756 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,756 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 30 treesize of output 22 [2021-06-05 05:09:42,757 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,762 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,763 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,763 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 30 treesize of output 22 [2021-06-05 05:09:42,764 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:42,770 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 38 treesize of output 28 [2021-06-05 05:09:42,771 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:42,962 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2021-06-05 05:09:42,963 INFO L628 ElimStorePlain]: treesize reduction 891, result has 11.5 percent of original size [2021-06-05 05:09:42,963 INFO L518 ElimStorePlain]: Eliminatee v_prenex_856 vanished before elimination [2021-06-05 05:09:42,966 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 [2021-06-05 05:09:42,967 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:43,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:43,010 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 [2021-06-05 05:09:43,011 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:43,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:43,050 INFO L518 ElimStorePlain]: Eliminatee v_prenex_858 vanished before elimination [2021-06-05 05:09:43,050 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:43,053 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 [2021-06-05 05:09:43,053 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:43,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:43,090 INFO L518 ElimStorePlain]: Eliminatee v_prenex_860 vanished before elimination [2021-06-05 05:09:43,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:09:43,092 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:09:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:43,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678200081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:43,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:43,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:09:43,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695870042] [2021-06-05 05:09:43,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:43,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:43,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:43,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:43,201 INFO L87 Difference]: Start difference. First operand 185 states and 410 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:09:43,619 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2021-06-05 05:09:43,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:43,759 INFO L93 Difference]: Finished difference Result 352 states and 739 transitions. [2021-06-05 05:09:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:43,759 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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 20 [2021-06-05 05:09:43,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:43,760 INFO L225 Difference]: With dead ends: 352 [2021-06-05 05:09:43,760 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 05:09:43,760 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 800.9ms TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:09:43,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 05:09:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 186. [2021-06-05 05:09:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.2324324324324323) internal successors, (413), 185 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:43,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 413 transitions. [2021-06-05 05:09:43,762 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 413 transitions. Word has length 20 [2021-06-05 05:09:43,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:43,762 INFO L482 AbstractCegarLoop]: Abstraction has 186 states and 413 transitions. [2021-06-05 05:09:43,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:09:43,762 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 413 transitions. [2021-06-05 05:09:43,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:43,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:43,762 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:43,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 724 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17731 [2021-06-05 05:09:43,963 INFO L430 AbstractCegarLoop]: === Iteration 742 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:43,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:43,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1984955439, now seen corresponding path program 721 times [2021-06-05 05:09:43,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:43,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511394488] [2021-06-05 05:09:43,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:43,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:44,157 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:44,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:44,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511394488] [2021-06-05 05:09:44,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511394488] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:44,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552976608] [2021-06-05 05:09:44,157 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 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 [2021-06-05 05:09:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:44,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:44,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:44,564 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:44,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552976608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:44,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:44,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 05:09:44,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123245088] [2021-06-05 05:09:44,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:09:44,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:44,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:09:44,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:09:44,564 INFO L87 Difference]: Start difference. First operand 186 states and 413 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:09:44,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:44,937 INFO L93 Difference]: Finished difference Result 364 states and 758 transitions. [2021-06-05 05:09:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:44,937 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 20 [2021-06-05 05:09:44,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:44,937 INFO L225 Difference]: With dead ends: 364 [2021-06-05 05:09:44,937 INFO L226 Difference]: Without dead ends: 357 [2021-06-05 05:09:44,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 492.2ms TimeCoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2021-06-05 05:09:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 187. [2021-06-05 05:09:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 2.2419354838709675) internal successors, (417), 186 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) [2021-06-05 05:09:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 417 transitions. [2021-06-05 05:09:44,940 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 417 transitions. Word has length 20 [2021-06-05 05:09:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:44,940 INFO L482 AbstractCegarLoop]: Abstraction has 187 states and 417 transitions. [2021-06-05 05:09:44,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:09:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 417 transitions. [2021-06-05 05:09:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:44,940 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:44,940 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:45,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 725 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17795 [2021-06-05 05:09:45,140 INFO L430 AbstractCegarLoop]: === Iteration 743 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:45,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:45,141 INFO L82 PathProgramCache]: Analyzing trace with hash -293370803, now seen corresponding path program 722 times [2021-06-05 05:09:45,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:45,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103345656] [2021-06-05 05:09:45,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:45,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:45,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103345656] [2021-06-05 05:09:45,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103345656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:45,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41522310] [2021-06-05 05:09:45,330 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 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 [2021-06-05 05:09:45,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:45,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:45,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:09:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:45,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,780 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,780 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 22 treesize of output 16 [2021-06-05 05:09:45,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:45,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,786 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-06-05 05:09:45,787 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:45,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,793 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 23 treesize of output 17 [2021-06-05 05:09:45,794 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,800 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 29 treesize of output 21 [2021-06-05 05:09:45,800 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,806 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-06-05 05:09:45,807 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:45,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:09:45,812 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 30 treesize of output 22 [2021-06-05 05:09:45,814 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:45,953 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 53 [2021-06-05 05:09:45,954 INFO L628 ElimStorePlain]: treesize reduction 680, result has 12.0 percent of original size [2021-06-05 05:09:45,954 INFO L518 ElimStorePlain]: Eliminatee v_prenex_868 vanished before elimination [2021-06-05 05:09:45,957 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 [2021-06-05 05:09:45,958 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:45,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:45,994 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 7 treesize of output 5 [2021-06-05 05:09:45,995 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:09:46,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:09:46,037 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:09:46,037 INFO L518 ElimStorePlain]: Eliminatee v_prenex_870 vanished before elimination [2021-06-05 05:09:46,039 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:09:46,039 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 05:09:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:46,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41522310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:46,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:46,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:09:46,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989236902] [2021-06-05 05:09:46,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:46,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:46,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:46,198 INFO L87 Difference]: Start difference. First operand 187 states and 417 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:09:46,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:46,665 INFO L93 Difference]: Finished difference Result 352 states and 740 transitions. [2021-06-05 05:09:46,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:09:46,665 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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 [2021-06-05 05:09:46,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:46,665 INFO L225 Difference]: With dead ends: 352 [2021-06-05 05:09:46,665 INFO L226 Difference]: Without dead ends: 345 [2021-06-05 05:09:46,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 696.2ms TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:09:46,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-06-05 05:09:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 182. [2021-06-05 05:09:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.2154696132596685) internal successors, (401), 181 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) [2021-06-05 05:09:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 401 transitions. [2021-06-05 05:09:46,667 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 401 transitions. Word has length 20 [2021-06-05 05:09:46,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:46,667 INFO L482 AbstractCegarLoop]: Abstraction has 182 states and 401 transitions. [2021-06-05 05:09:46,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:09:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 401 transitions. [2021-06-05 05:09:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:46,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:46,668 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:46,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 726 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17829 [2021-06-05 05:09:46,868 INFO L430 AbstractCegarLoop]: === Iteration 744 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:46,868 INFO L82 PathProgramCache]: Analyzing trace with hash 2418359, now seen corresponding path program 723 times [2021-06-05 05:09:46,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:46,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110559563] [2021-06-05 05:09:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:47,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:47,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110559563] [2021-06-05 05:09:47,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110559563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:47,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821665395] [2021-06-05 05:09:47,048 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 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 [2021-06-05 05:09:47,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:09:47,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:47,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:47,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:47,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:47,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821665395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:47,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:47,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:09:47,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860598812] [2021-06-05 05:09:47,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:47,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:47,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:47,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:47,468 INFO L87 Difference]: Start difference. First operand 182 states and 401 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:48,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:48,079 INFO L93 Difference]: Finished difference Result 418 states and 851 transitions. [2021-06-05 05:09:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:48,080 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:09:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:48,080 INFO L225 Difference]: With dead ends: 418 [2021-06-05 05:09:48,080 INFO L226 Difference]: Without dead ends: 411 [2021-06-05 05:09:48,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 725.7ms TimeCoverageRelationStatistics Valid=96, Invalid=716, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:09:48,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2021-06-05 05:09:48,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 206. [2021-06-05 05:09:48,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 2.2390243902439027) internal successors, (459), 205 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:48,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 459 transitions. [2021-06-05 05:09:48,082 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 459 transitions. Word has length 20 [2021-06-05 05:09:48,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:48,083 INFO L482 AbstractCegarLoop]: Abstraction has 206 states and 459 transitions. [2021-06-05 05:09:48,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:48,083 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 459 transitions. [2021-06-05 05:09:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:48,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:48,083 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:48,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17866,727 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:48,283 INFO L430 AbstractCegarLoop]: === Iteration 745 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:48,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1138522363, now seen corresponding path program 724 times [2021-06-05 05:09:48,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:48,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389916711] [2021-06-05 05:09:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:48,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:48,594 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:48,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389916711] [2021-06-05 05:09:48,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389916711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:48,594 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322701126] [2021-06-05 05:09:48,594 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 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 [2021-06-05 05:09:48,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:48,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:48,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:48,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:49,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322701126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:49,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:49,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:09:49,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884502553] [2021-06-05 05:09:49,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:49,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:49,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:49,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:49,098 INFO L87 Difference]: Start difference. First operand 206 states and 459 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) [2021-06-05 05:09:49,863 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2021-06-05 05:09:50,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:50,406 INFO L93 Difference]: Finished difference Result 419 states and 850 transitions. [2021-06-05 05:09:50,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:09:50,406 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 [2021-06-05 05:09:50,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:50,407 INFO L225 Difference]: With dead ends: 419 [2021-06-05 05:09:50,407 INFO L226 Difference]: Without dead ends: 403 [2021-06-05 05:09:50,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1435.2ms TimeCoverageRelationStatistics Valid=111, Invalid=945, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:09:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-06-05 05:09:50,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 212. [2021-06-05 05:09:50,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.2322274881516586) internal successors, (471), 211 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:50,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 471 transitions. [2021-06-05 05:09:50,409 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 471 transitions. Word has length 20 [2021-06-05 05:09:50,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:50,409 INFO L482 AbstractCegarLoop]: Abstraction has 212 states and 471 transitions. [2021-06-05 05:09:50,409 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) [2021-06-05 05:09:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 471 transitions. [2021-06-05 05:09:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:50,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:50,409 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:50,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17901,728 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:50,610 INFO L430 AbstractCegarLoop]: === Iteration 746 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:50,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:50,610 INFO L82 PathProgramCache]: Analyzing trace with hash 898076215, now seen corresponding path program 725 times [2021-06-05 05:09:50,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:50,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358287170] [2021-06-05 05:09:50,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:50,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:50,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:50,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358287170] [2021-06-05 05:09:50,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358287170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:50,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839077234] [2021-06-05 05:09:50,789 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 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 [2021-06-05 05:09:50,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:09:50,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:50,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:50,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:51,241 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:51,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839077234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:51,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:51,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:09:51,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573339520] [2021-06-05 05:09:51,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:51,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:51,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:51,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:51,242 INFO L87 Difference]: Start difference. First operand 212 states and 471 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:52,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:52,033 INFO L93 Difference]: Finished difference Result 430 states and 879 transitions. [2021-06-05 05:09:52,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:09:52,033 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:09:52,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:52,033 INFO L225 Difference]: With dead ends: 430 [2021-06-05 05:09:52,033 INFO L226 Difference]: Without dead ends: 423 [2021-06-05 05:09:52,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:09:52,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-06-05 05:09:52,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 214. [2021-06-05 05:09:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.244131455399061) internal successors, (478), 213 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:52,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 478 transitions. [2021-06-05 05:09:52,036 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 478 transitions. Word has length 20 [2021-06-05 05:09:52,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:52,036 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 478 transitions. [2021-06-05 05:09:52,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:52,036 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 478 transitions. [2021-06-05 05:09:52,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:52,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:52,036 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:52,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17947,729 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:52,237 INFO L430 AbstractCegarLoop]: === Iteration 747 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:52,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:52,237 INFO L82 PathProgramCache]: Analyzing trace with hash 197583227, now seen corresponding path program 726 times [2021-06-05 05:09:52,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:52,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794155539] [2021-06-05 05:09:52,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:52,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:52,514 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:52,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794155539] [2021-06-05 05:09:52,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794155539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:52,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9888410] [2021-06-05 05:09:52,515 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 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 [2021-06-05 05:09:52,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:09:52,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:52,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:52,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9888410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:52,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:52,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:09:52,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3630168] [2021-06-05 05:09:52,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:52,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:52,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:52,926 INFO L87 Difference]: Start difference. First operand 214 states and 478 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) [2021-06-05 05:09:53,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:53,895 INFO L93 Difference]: Finished difference Result 431 states and 882 transitions. [2021-06-05 05:09:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:09:53,895 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 20 [2021-06-05 05:09:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:53,895 INFO L225 Difference]: With dead ends: 431 [2021-06-05 05:09:53,895 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 05:09:53,896 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1040.3ms TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:09:53,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 05:09:53,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 215. [2021-06-05 05:09:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 2.2523364485981308) internal successors, (482), 214 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:09:53,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 482 transitions. [2021-06-05 05:09:53,898 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 482 transitions. Word has length 20 [2021-06-05 05:09:53,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:53,898 INFO L482 AbstractCegarLoop]: Abstraction has 215 states and 482 transitions. [2021-06-05 05:09:53,898 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) [2021-06-05 05:09:53,898 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 482 transitions. [2021-06-05 05:09:53,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:53,898 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:53,898 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:54,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 730 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17994 [2021-06-05 05:09:54,099 INFO L430 AbstractCegarLoop]: === Iteration 748 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1889167863, now seen corresponding path program 727 times [2021-06-05 05:09:54,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:54,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995612463] [2021-06-05 05:09:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:54,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995612463] [2021-06-05 05:09:54,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995612463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:54,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823793593] [2021-06-05 05:09:54,395 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 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 [2021-06-05 05:09:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:54,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:54,858 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:54,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823793593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:54,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:54,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:09:54,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657186675] [2021-06-05 05:09:54,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:09:54,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:54,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:09:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:09:54,859 INFO L87 Difference]: Start difference. First operand 215 states and 482 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) [2021-06-05 05:09:56,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:56,020 INFO L93 Difference]: Finished difference Result 464 states and 962 transitions. [2021-06-05 05:09:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:09:56,020 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 [2021-06-05 05:09:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:56,021 INFO L225 Difference]: With dead ends: 464 [2021-06-05 05:09:56,021 INFO L226 Difference]: Without dead ends: 457 [2021-06-05 05:09:56,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1284.5ms TimeCoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:09:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-06-05 05:09:56,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 227. [2021-06-05 05:09:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.2964601769911503) internal successors, (519), 226 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) [2021-06-05 05:09:56,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 519 transitions. [2021-06-05 05:09:56,023 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 519 transitions. Word has length 20 [2021-06-05 05:09:56,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:56,024 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 519 transitions. [2021-06-05 05:09:56,024 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) [2021-06-05 05:09:56,024 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 519 transitions. [2021-06-05 05:09:56,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:56,024 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:56,024 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:56,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 731 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18029 [2021-06-05 05:09:56,224 INFO L430 AbstractCegarLoop]: === Iteration 749 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:56,225 INFO L82 PathProgramCache]: Analyzing trace with hash -2116209135, now seen corresponding path program 728 times [2021-06-05 05:09:56,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:56,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302049687] [2021-06-05 05:09:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:56,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302049687] [2021-06-05 05:09:56,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302049687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193879910] [2021-06-05 05:09:56,468 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 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 [2021-06-05 05:09:56,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:09:56,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:56,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:56,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:56,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:56,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193879910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:56,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:56,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:09:56,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573052083] [2021-06-05 05:09:56,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:09:56,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:56,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:09:56,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:09:56,885 INFO L87 Difference]: Start difference. First operand 227 states and 519 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) [2021-06-05 05:09:57,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:57,673 INFO L93 Difference]: Finished difference Result 523 states and 1100 transitions. [2021-06-05 05:09:57,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:09:57,673 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 20 [2021-06-05 05:09:57,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:57,673 INFO L225 Difference]: With dead ends: 523 [2021-06-05 05:09:57,673 INFO L226 Difference]: Without dead ends: 516 [2021-06-05 05:09:57,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 832.6ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:09:57,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-06-05 05:09:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 250. [2021-06-05 05:09:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.3815261044176705) internal successors, (593), 249 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) [2021-06-05 05:09:57,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 593 transitions. [2021-06-05 05:09:57,676 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 593 transitions. Word has length 20 [2021-06-05 05:09:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:57,677 INFO L482 AbstractCegarLoop]: Abstraction has 250 states and 593 transitions. [2021-06-05 05:09:57,677 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) [2021-06-05 05:09:57,677 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 593 transitions. [2021-06-05 05:09:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:57,677 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:57,677 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:57,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18076,732 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:09:57,877 INFO L430 AbstractCegarLoop]: === Iteration 750 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1938312013, now seen corresponding path program 729 times [2021-06-05 05:09:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:57,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484159234] [2021-06-05 05:09:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:57,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:58,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484159234] [2021-06-05 05:09:58,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484159234] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:58,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151515903] [2021-06-05 05:09:58,039 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 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 [2021-06-05 05:09:58,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:09:58,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:58,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:58,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:09:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:58,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151515903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:58,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:09:58,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:09:58,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192109064] [2021-06-05 05:09:58,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:09:58,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:09:58,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:09:58,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:09:58,451 INFO L87 Difference]: Start difference. First operand 250 states and 593 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:09:59,385 INFO L93 Difference]: Finished difference Result 549 states and 1151 transitions. [2021-06-05 05:09:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:09:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:09:59,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:09:59,386 INFO L225 Difference]: With dead ends: 549 [2021-06-05 05:09:59,386 INFO L226 Difference]: Without dead ends: 542 [2021-06-05 05:09:59,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 797.3ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:09:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-06-05 05:09:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 253. [2021-06-05 05:09:59,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.3968253968253967) internal successors, (604), 252 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) [2021-06-05 05:09:59,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 604 transitions. [2021-06-05 05:09:59,389 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 604 transitions. Word has length 20 [2021-06-05 05:09:59,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:09:59,389 INFO L482 AbstractCegarLoop]: Abstraction has 253 states and 604 transitions. [2021-06-05 05:09:59,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:09:59,389 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 604 transitions. [2021-06-05 05:09:59,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:09:59,389 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:09:59,389 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:09:59,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 733 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18122 [2021-06-05 05:09:59,590 INFO L430 AbstractCegarLoop]: === Iteration 751 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:09:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:09:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1237819025, now seen corresponding path program 730 times [2021-06-05 05:09:59,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:09:59,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493637648] [2021-06-05 05:09:59,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:09:59,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:09:59,864 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:09:59,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:09:59,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493637648] [2021-06-05 05:09:59,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493637648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:09:59,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16041082] [2021-06-05 05:09:59,864 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 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 [2021-06-05 05:09:59,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:09:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:09:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:09:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:00,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16041082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:00,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:00,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:00,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059045289] [2021-06-05 05:10:00,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:00,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:00,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:00,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:00,254 INFO L87 Difference]: Start difference. First operand 253 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) [2021-06-05 05:10:00,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:00,815 INFO L93 Difference]: Finished difference Result 431 states and 953 transitions. [2021-06-05 05:10:00,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:00,815 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 [2021-06-05 05:10:00,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:00,816 INFO L225 Difference]: With dead ends: 431 [2021-06-05 05:10:00,816 INFO L226 Difference]: Without dead ends: 424 [2021-06-05 05:10:00,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 737.6ms TimeCoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:10:00,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-06-05 05:10:00,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 257. [2021-06-05 05:10:00,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 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) [2021-06-05 05:10:00,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-06-05 05:10:00,818 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-06-05 05:10:00,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:00,818 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-06-05 05:10:00,818 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) [2021-06-05 05:10:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-06-05 05:10:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:00,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:00,819 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:01,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 734 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18169 [2021-06-05 05:10:01,019 INFO L430 AbstractCegarLoop]: === Iteration 752 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:01,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1365563635, now seen corresponding path program 731 times [2021-06-05 05:10:01,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:01,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252783991] [2021-06-05 05:10:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:01,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252783991] [2021-06-05 05:10:01,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252783991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:01,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519023953] [2021-06-05 05:10:01,196 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 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 [2021-06-05 05:10:01,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:01,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:01,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:01,540 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:01,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519023953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:01,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:01,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:10:01,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264073023] [2021-06-05 05:10:01,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:01,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:01,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:01,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:01,541 INFO L87 Difference]: Start difference. First operand 257 states and 616 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) [2021-06-05 05:10:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:02,343 INFO L93 Difference]: Finished difference Result 556 states and 1172 transitions. [2021-06-05 05:10:02,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:02,343 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 20 [2021-06-05 05:10:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:02,344 INFO L225 Difference]: With dead ends: 556 [2021-06-05 05:10:02,344 INFO L226 Difference]: Without dead ends: 549 [2021-06-05 05:10:02,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 743.5ms TimeCoverageRelationStatistics Valid=125, Invalid=1065, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:10:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2021-06-05 05:10:02,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 257. [2021-06-05 05:10:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.40625) internal successors, (616), 256 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) [2021-06-05 05:10:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 616 transitions. [2021-06-05 05:10:02,347 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 616 transitions. Word has length 20 [2021-06-05 05:10:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:02,347 INFO L482 AbstractCegarLoop]: Abstraction has 257 states and 616 transitions. [2021-06-05 05:10:02,347 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) [2021-06-05 05:10:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 616 transitions. [2021-06-05 05:10:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:02,348 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:02,348 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:02,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 735 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18204 [2021-06-05 05:10:02,548 INFO L430 AbstractCegarLoop]: === Iteration 753 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:02,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:02,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1768909961, now seen corresponding path program 732 times [2021-06-05 05:10:02,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:02,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129001482] [2021-06-05 05:10:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:02,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:02,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129001482] [2021-06-05 05:10:02,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129001482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:02,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169991963] [2021-06-05 05:10:02,705 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 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 [2021-06-05 05:10:02,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:10:02,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:02,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:03,137 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:03,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169991963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:03,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:03,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:10:03,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339592276] [2021-06-05 05:10:03,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:03,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:03,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:03,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:03,138 INFO L87 Difference]: Start difference. First operand 257 states and 616 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:10:03,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:03,979 INFO L93 Difference]: Finished difference Result 598 states and 1288 transitions. [2021-06-05 05:10:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:10:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:10:03,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:03,981 INFO L225 Difference]: With dead ends: 598 [2021-06-05 05:10:03,981 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 05:10:03,981 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 777.0ms TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:10:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 05:10:03,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 292. [2021-06-05 05:10:03,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 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) [2021-06-05 05:10:03,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-06-05 05:10:03,984 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-06-05 05:10:03,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:03,984 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-06-05 05:10:03,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:10:03,984 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-06-05 05:10:03,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:03,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:03,985 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:04,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18239,736 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:04,185 INFO L430 AbstractCegarLoop]: === Iteration 754 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:04,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:04,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1825564347, now seen corresponding path program 733 times [2021-06-05 05:10:04,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:04,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804446939] [2021-06-05 05:10:04,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:04,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:04,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804446939] [2021-06-05 05:10:04,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804446939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:04,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569301702] [2021-06-05 05:10:04,362 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 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 [2021-06-05 05:10:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:04,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:04,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:04,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:04,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569301702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:04,723 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:04,723 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 05:10:04,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686742552] [2021-06-05 05:10:04,723 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:04,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:04,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:04,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:04,723 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:10:05,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:05,597 INFO L93 Difference]: Finished difference Result 620 states and 1327 transitions. [2021-06-05 05:10:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:10:05,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 20 [2021-06-05 05:10:05,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:05,598 INFO L225 Difference]: With dead ends: 620 [2021-06-05 05:10:05,598 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 05:10:05,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 780.2ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:10:05,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 05:10:05,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 293. [2021-06-05 05:10:05,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.4486301369863015) internal successors, (715), 292 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) [2021-06-05 05:10:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 715 transitions. [2021-06-05 05:10:05,601 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 715 transitions. Word has length 20 [2021-06-05 05:10:05,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:05,602 INFO L482 AbstractCegarLoop]: Abstraction has 293 states and 715 transitions. [2021-06-05 05:10:05,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:10:05,602 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 715 transitions. [2021-06-05 05:10:05,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:05,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:05,602 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:05,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18285,737 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:05,803 INFO L430 AbstractCegarLoop]: === Iteration 755 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:05,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:05,803 INFO L82 PathProgramCache]: Analyzing trace with hash -777818313, now seen corresponding path program 734 times [2021-06-05 05:10:05,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:05,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800759313] [2021-06-05 05:10:05,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:05,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:05,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:05,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:05,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800759313] [2021-06-05 05:10:05,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800759313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:05,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183884135] [2021-06-05 05:10:05,970 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 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 [2021-06-05 05:10:06,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:06,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:06,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:06,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:06,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,389 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 22 treesize of output 16 [2021-06-05 05:10:06,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,396 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 22 treesize of output 16 [2021-06-05 05:10:06,396 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,402 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,402 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 29 treesize of output 21 [2021-06-05 05:10:06,403 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,409 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 23 treesize of output 17 [2021-06-05 05:10:06,409 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,415 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,416 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 23 treesize of output 17 [2021-06-05 05:10:06,417 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,426 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:06,427 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 30 treesize of output 22 [2021-06-05 05:10:06,452 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,620 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 55 [2021-06-05 05:10:06,621 INFO L628 ElimStorePlain]: treesize reduction 678, result has 13.0 percent of original size [2021-06-05 05:10:06,621 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:10:06,624 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 [2021-06-05 05:10:06,625 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:06,662 INFO L518 ElimStorePlain]: Eliminatee v_prenex_892 vanished before elimination [2021-06-05 05:10:06,665 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 16 treesize of output 12 [2021-06-05 05:10:06,666 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:06,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:06,699 INFO L518 ElimStorePlain]: Eliminatee v_prenex_895 vanished before elimination [2021-06-05 05:10:06,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 6 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:10:06,700 INFO L247 ElimStorePlain]: Needed 9 recursive calls to eliminate 9 variables, input treesize:949, output treesize:85 [2021-06-05 05:10:06,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:06,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183884135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:06,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:06,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:06,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123950314] [2021-06-05 05:10:06,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:06,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:06,871 INFO L87 Difference]: Start difference. First operand 293 states and 715 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) [2021-06-05 05:10:08,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:08,175 INFO L93 Difference]: Finished difference Result 628 states and 1346 transitions. [2021-06-05 05:10:08,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:10:08,175 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 [2021-06-05 05:10:08,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:08,176 INFO L225 Difference]: With dead ends: 628 [2021-06-05 05:10:08,176 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 05:10:08,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 1162.3ms TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:10:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 05:10:08,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 292. [2021-06-05 05:10:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.443298969072165) internal successors, (711), 291 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) [2021-06-05 05:10:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 711 transitions. [2021-06-05 05:10:08,179 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 711 transitions. Word has length 20 [2021-06-05 05:10:08,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:08,179 INFO L482 AbstractCegarLoop]: Abstraction has 292 states and 711 transitions. [2021-06-05 05:10:08,180 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) [2021-06-05 05:10:08,180 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 711 transitions. [2021-06-05 05:10:08,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:08,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:08,180 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:08,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 738 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18333 [2021-06-05 05:10:08,380 INFO L430 AbstractCegarLoop]: === Iteration 756 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:08,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:08,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1290334545, now seen corresponding path program 735 times [2021-06-05 05:10:08,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:08,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87111238] [2021-06-05 05:10:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:08,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87111238] [2021-06-05 05:10:08,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87111238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:08,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920296469] [2021-06-05 05:10:08,531 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 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 [2021-06-05 05:10:08,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:10:08,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:08,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:08,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:08,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:08,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920296469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:08,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:08,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 05:10:08,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607684957] [2021-06-05 05:10:08,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:08,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:08,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:08,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:08,954 INFO L87 Difference]: Start difference. First operand 292 states and 711 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:10:09,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:09,689 INFO L93 Difference]: Finished difference Result 620 states and 1330 transitions. [2021-06-05 05:10:09,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:10:09,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 20 [2021-06-05 05:10:09,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:09,690 INFO L225 Difference]: With dead ends: 620 [2021-06-05 05:10:09,690 INFO L226 Difference]: Without dead ends: 613 [2021-06-05 05:10:09,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 543.3ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:09,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-06-05 05:10:09,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 295. [2021-06-05 05:10:09,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 2.45578231292517) internal successors, (722), 294 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:09,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 722 transitions. [2021-06-05 05:10:09,694 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 722 transitions. Word has length 20 [2021-06-05 05:10:09,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:09,694 INFO L482 AbstractCegarLoop]: Abstraction has 295 states and 722 transitions. [2021-06-05 05:10:09,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:10:09,694 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 722 transitions. [2021-06-05 05:10:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:09,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:09,694 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:09,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18383,739 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:09,911 INFO L430 AbstractCegarLoop]: === Iteration 757 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:09,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1313048115, now seen corresponding path program 736 times [2021-06-05 05:10:09,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:09,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840071914] [2021-06-05 05:10:09,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:09,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:10,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:10,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:10,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840071914] [2021-06-05 05:10:10,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840071914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:10,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562029533] [2021-06-05 05:10:10,062 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 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 [2021-06-05 05:10:10,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:10,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:10,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:10,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:10,468 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:10,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562029533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:10,468 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:10,468 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-05 05:10:10,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369958140] [2021-06-05 05:10:10,468 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:10,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:10,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:10,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:10,469 INFO L87 Difference]: Start difference. First operand 295 states and 722 transitions. Second operand has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:10:11,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:11,139 INFO L93 Difference]: Finished difference Result 622 states and 1332 transitions. [2021-06-05 05:10:11,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:10:11,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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 20 [2021-06-05 05:10:11,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:11,140 INFO L225 Difference]: With dead ends: 622 [2021-06-05 05:10:11,140 INFO L226 Difference]: Without dead ends: 615 [2021-06-05 05:10:11,140 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=103, Invalid=953, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:11,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-06-05 05:10:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 294. [2021-06-05 05:10:11,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-06-05 05:10:11,143 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-06-05 05:10:11,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:11,143 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-06-05 05:10:11,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2021-06-05 05:10:11,143 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-06-05 05:10:11,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:11,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:11,144 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:11,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 740 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18482 [2021-06-05 05:10:11,344 INFO L430 AbstractCegarLoop]: === Iteration 758 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1139800423, now seen corresponding path program 737 times [2021-06-05 05:10:11,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:11,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883403199] [2021-06-05 05:10:11,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:11,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:11,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883403199] [2021-06-05 05:10:11,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883403199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:11,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827458307] [2021-06-05 05:10:11,511 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 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 [2021-06-05 05:10:11,542 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:10:11,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:11,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:11,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:12,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827458307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:12,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:12,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:10:12,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186594924] [2021-06-05 05:10:12,014 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:12,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:12,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:12,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:12,014 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:12,666 INFO L93 Difference]: Finished difference Result 599 states and 1292 transitions. [2021-06-05 05:10:12,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:10:12,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:10:12,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:12,667 INFO L225 Difference]: With dead ends: 599 [2021-06-05 05:10:12,667 INFO L226 Difference]: Without dead ends: 592 [2021-06-05 05:10:12,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 648.6ms TimeCoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:12,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-05 05:10:12,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 294. [2021-06-05 05:10:12,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.4505119453924915) internal successors, (718), 293 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 718 transitions. [2021-06-05 05:10:12,674 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 718 transitions. Word has length 20 [2021-06-05 05:10:12,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:12,674 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 718 transitions. [2021-06-05 05:10:12,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:12,674 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 718 transitions. [2021-06-05 05:10:12,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:12,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:12,674 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:12,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18581,741 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:12,875 INFO L430 AbstractCegarLoop]: === Iteration 759 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:12,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1265437, now seen corresponding path program 738 times [2021-06-05 05:10:12,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:12,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018665278] [2021-06-05 05:10:12,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:12,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:13,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:13,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018665278] [2021-06-05 05:10:13,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018665278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:13,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728425699] [2021-06-05 05:10:13,344 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 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 [2021-06-05 05:10:13,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:10:13,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:13,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 05:10:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:14,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,084 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,085 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 29 treesize of output 21 [2021-06-05 05:10:14,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:14,092 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,099 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 30 treesize of output 22 [2021-06-05 05:10:14,099 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,106 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,106 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 23 treesize of output 17 [2021-06-05 05:10:14,107 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,113 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:14,114 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:14,120 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 23 treesize of output 17 [2021-06-05 05:10:14,120 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,318 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 61 [2021-06-05 05:10:14,318 INFO L628 ElimStorePlain]: treesize reduction 935, result has 11.0 percent of original size [2021-06-05 05:10:14,318 INFO L518 ElimStorePlain]: Eliminatee v_prenex_902 vanished before elimination [2021-06-05 05:10:14,321 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 [2021-06-05 05:10:14,322 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:14,365 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 [2021-06-05 05:10:14,366 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:14,403 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:10:14,403 INFO L518 ElimStorePlain]: Eliminatee v_prenex_904 vanished before elimination [2021-06-05 05:10:14,406 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 7 treesize of output 5 [2021-06-05 05:10:14,407 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:14,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:10:14,451 INFO L518 ElimStorePlain]: Eliminatee v_prenex_906 vanished before elimination [2021-06-05 05:10:14,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 8 dim-1 vars, End of recursive call: and 4 xjuncts. [2021-06-05 05:10:14,452 INFO L247 ElimStorePlain]: Needed 10 recursive calls to eliminate 12 variables, input treesize:1201, output treesize:77 [2021-06-05 05:10:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:14,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728425699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:14,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:14,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:14,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329276624] [2021-06-05 05:10:14,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:14,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:14,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:14,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:14,593 INFO L87 Difference]: Start difference. First operand 294 states and 718 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:10:14,962 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2021-06-05 05:10:15,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:15,425 INFO L93 Difference]: Finished difference Result 536 states and 1162 transitions. [2021-06-05 05:10:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 [2021-06-05 05:10:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:15,426 INFO L225 Difference]: With dead ends: 536 [2021-06-05 05:10:15,426 INFO L226 Difference]: Without dead ends: 522 [2021-06-05 05:10:15,426 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1333.0ms TimeCoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:10:15,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-06-05 05:10:15,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 318. [2021-06-05 05:10:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.4574132492113563) internal successors, (779), 317 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 779 transitions. [2021-06-05 05:10:15,429 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 779 transitions. Word has length 20 [2021-06-05 05:10:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:15,429 INFO L482 AbstractCegarLoop]: Abstraction has 318 states and 779 transitions. [2021-06-05 05:10:15,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:10:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 779 transitions. [2021-06-05 05:10:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:15,429 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:15,429 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:15,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18704,742 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:15,630 INFO L430 AbstractCegarLoop]: === Iteration 760 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:15,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:15,630 INFO L82 PathProgramCache]: Analyzing trace with hash 858220319, now seen corresponding path program 739 times [2021-06-05 05:10:15,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:15,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921970154] [2021-06-05 05:10:15,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:15,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:15,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921970154] [2021-06-05 05:10:15,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921970154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:15,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942026441] [2021-06-05 05:10:15,842 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 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 [2021-06-05 05:10:15,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:15,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942026441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:16,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:16,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:10:16,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707943291] [2021-06-05 05:10:16,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:16,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:16,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:16,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:16,345 INFO L87 Difference]: Start difference. First operand 318 states and 779 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:10:16,818 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-06-05 05:10:17,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:17,280 INFO L93 Difference]: Finished difference Result 571 states and 1225 transitions. [2021-06-05 05:10:17,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:17,280 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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 20 [2021-06-05 05:10:17,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:17,281 INFO L225 Difference]: With dead ends: 571 [2021-06-05 05:10:17,281 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 05:10:17,281 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 907.5ms TimeCoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:10:17,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 05:10:17,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 322. [2021-06-05 05:10:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 2.467289719626168) internal successors, (792), 321 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:17,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 792 transitions. [2021-06-05 05:10:17,284 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 792 transitions. Word has length 20 [2021-06-05 05:10:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:17,284 INFO L482 AbstractCegarLoop]: Abstraction has 322 states and 792 transitions. [2021-06-05 05:10:17,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:10:17,285 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 792 transitions. [2021-06-05 05:10:17,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:17,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:17,285 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:17,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18752,743 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:17,485 INFO L430 AbstractCegarLoop]: === Iteration 761 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1994324323, now seen corresponding path program 740 times [2021-06-05 05:10:17,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:17,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085251805] [2021-06-05 05:10:17,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:17,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:17,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085251805] [2021-06-05 05:10:17,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085251805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:17,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044479714] [2021-06-05 05:10:17,735 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 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 [2021-06-05 05:10:17,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:17,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:17,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:17,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:18,233 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:18,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044479714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:18,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:18,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:18,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007209250] [2021-06-05 05:10:18,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:18,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:18,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:18,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:18,234 INFO L87 Difference]: Start difference. First operand 322 states and 792 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) [2021-06-05 05:10:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:19,127 INFO L93 Difference]: Finished difference Result 567 states and 1222 transitions. [2021-06-05 05:10:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:10:19,127 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 20 [2021-06-05 05:10:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:19,128 INFO L225 Difference]: With dead ends: 567 [2021-06-05 05:10:19,128 INFO L226 Difference]: Without dead ends: 560 [2021-06-05 05:10:19,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 875.6ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:10:19,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-05 05:10:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 325. [2021-06-05 05:10:19,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.4753086419753085) internal successors, (802), 324 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:19,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 802 transitions. [2021-06-05 05:10:19,132 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 802 transitions. Word has length 20 [2021-06-05 05:10:19,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:19,132 INFO L482 AbstractCegarLoop]: Abstraction has 325 states and 802 transitions. [2021-06-05 05:10:19,132 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) [2021-06-05 05:10:19,132 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 802 transitions. [2021-06-05 05:10:19,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:19,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:19,132 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:19,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 744 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18799 [2021-06-05 05:10:19,333 INFO L430 AbstractCegarLoop]: === Iteration 762 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1753878175, now seen corresponding path program 741 times [2021-06-05 05:10:19,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:19,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003854901] [2021-06-05 05:10:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:19,717 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:19,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003854901] [2021-06-05 05:10:19,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003854901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:19,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394045009] [2021-06-05 05:10:19,718 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 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 [2021-06-05 05:10:19,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:19,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:19,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:19,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:20,224 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:20,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394045009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:20,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:20,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:20,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967558232] [2021-06-05 05:10:20,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:20,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:20,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:20,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:20,225 INFO L87 Difference]: Start difference. First operand 325 states and 802 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) [2021-06-05 05:10:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:21,442 INFO L93 Difference]: Finished difference Result 573 states and 1249 transitions. [2021-06-05 05:10:21,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:10:21,442 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 20 [2021-06-05 05:10:21,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:21,443 INFO L225 Difference]: With dead ends: 573 [2021-06-05 05:10:21,443 INFO L226 Difference]: Without dead ends: 566 [2021-06-05 05:10:21,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1278.5ms TimeCoverageRelationStatistics Valid=93, Invalid=899, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:21,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-06-05 05:10:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 327. [2021-06-05 05:10:21,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 2.48159509202454) internal successors, (809), 326 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 809 transitions. [2021-06-05 05:10:21,446 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 809 transitions. Word has length 20 [2021-06-05 05:10:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:21,446 INFO L482 AbstractCegarLoop]: Abstraction has 327 states and 809 transitions. [2021-06-05 05:10:21,446 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) [2021-06-05 05:10:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 809 transitions. [2021-06-05 05:10:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:21,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:21,447 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:21,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18845,745 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:21,647 INFO L430 AbstractCegarLoop]: === Iteration 763 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1053385187, now seen corresponding path program 742 times [2021-06-05 05:10:21,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:21,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118702351] [2021-06-05 05:10:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:21,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:21,974 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:21,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:21,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118702351] [2021-06-05 05:10:21,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118702351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:21,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684522260] [2021-06-05 05:10:21,974 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 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 [2021-06-05 05:10:22,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:22,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:22,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:22,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:22,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684522260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:22,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:22,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2021-06-05 05:10:22,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905388445] [2021-06-05 05:10:22,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:22,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:22,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:22,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=336, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:22,465 INFO L87 Difference]: Start difference. First operand 327 states and 809 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:23,133 INFO L93 Difference]: Finished difference Result 570 states and 1244 transitions. [2021-06-05 05:10:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:10:23,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:10:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:23,134 INFO L225 Difference]: With dead ends: 570 [2021-06-05 05:10:23,134 INFO L226 Difference]: Without dead ends: 563 [2021-06-05 05:10:23,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 793.8ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:23,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2021-06-05 05:10:23,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 328. [2021-06-05 05:10:23,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.4862385321100917) internal successors, (813), 327 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 813 transitions. [2021-06-05 05:10:23,137 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 813 transitions. Word has length 20 [2021-06-05 05:10:23,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:23,138 INFO L482 AbstractCegarLoop]: Abstraction has 328 states and 813 transitions. [2021-06-05 05:10:23,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 813 transitions. [2021-06-05 05:10:23,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:23,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:23,138 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:23,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18880,746 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:23,338 INFO L430 AbstractCegarLoop]: === Iteration 764 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:23,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1549997473, now seen corresponding path program 743 times [2021-06-05 05:10:23,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:23,339 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84012670] [2021-06-05 05:10:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:23,775 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:23,775 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84012670] [2021-06-05 05:10:23,775 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84012670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:23,775 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482968763] [2021-06-05 05:10:23,776 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 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 [2021-06-05 05:10:23,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:23,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:23,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:23,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:24,271 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:24,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482968763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:24,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:24,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:10:24,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623110152] [2021-06-05 05:10:24,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:10:24,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:24,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:10:24,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:24,272 INFO L87 Difference]: Start difference. First operand 328 states and 813 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) [2021-06-05 05:10:25,456 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 36 [2021-06-05 05:10:25,622 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 39 [2021-06-05 05:10:25,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:25,773 INFO L93 Difference]: Finished difference Result 555 states and 1221 transitions. [2021-06-05 05:10:25,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:10:25,774 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 [2021-06-05 05:10:25,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:25,774 INFO L225 Difference]: With dead ends: 555 [2021-06-05 05:10:25,774 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 05:10:25,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1642.7ms TimeCoverageRelationStatistics Valid=98, Invalid=958, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:25,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 05:10:25,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 323. [2021-06-05 05:10:25,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.4751552795031055) internal successors, (797), 322 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 797 transitions. [2021-06-05 05:10:25,778 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 797 transitions. Word has length 20 [2021-06-05 05:10:25,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:25,778 INFO L482 AbstractCegarLoop]: Abstraction has 323 states and 797 transitions. [2021-06-05 05:10:25,778 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) [2021-06-05 05:10:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 797 transitions. [2021-06-05 05:10:25,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:25,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:25,778 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:25,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 747 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18931 [2021-06-05 05:10:25,979 INFO L430 AbstractCegarLoop]: === Iteration 765 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:25,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:25,979 INFO L82 PathProgramCache]: Analyzing trace with hash -18807645, now seen corresponding path program 744 times [2021-06-05 05:10:25,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:25,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531961312] [2021-06-05 05:10:25,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:26,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:26,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531961312] [2021-06-05 05:10:26,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531961312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:26,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060625891] [2021-06-05 05:10:26,149 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 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 [2021-06-05 05:10:26,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:10:26,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:26,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:26,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:26,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060625891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:26,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:26,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 05:10:26,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811247010] [2021-06-05 05:10:26,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:26,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:26,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:26,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:26,538 INFO L87 Difference]: Start difference. First operand 323 states and 797 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) [2021-06-05 05:10:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:27,292 INFO L93 Difference]: Finished difference Result 593 states and 1331 transitions. [2021-06-05 05:10:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:10:27,293 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 [2021-06-05 05:10:27,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:27,293 INFO L225 Difference]: With dead ends: 593 [2021-06-05 05:10:27,293 INFO L226 Difference]: Without dead ends: 586 [2021-06-05 05:10:27,293 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 698.1ms TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:10:27,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-06-05 05:10:27,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2021-06-05 05:10:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 2.529585798816568) internal successors, (855), 338 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:27,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 855 transitions. [2021-06-05 05:10:27,297 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 855 transitions. Word has length 20 [2021-06-05 05:10:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:27,297 INFO L482 AbstractCegarLoop]: Abstraction has 339 states and 855 transitions. [2021-06-05 05:10:27,297 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) [2021-06-05 05:10:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 855 transitions. [2021-06-05 05:10:27,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:27,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:27,298 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:27,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18965,748 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:27,498 INFO L430 AbstractCegarLoop]: === Iteration 766 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:27,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1979980895, now seen corresponding path program 745 times [2021-06-05 05:10:27,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:27,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968378817] [2021-06-05 05:10:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:27,840 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:27,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:27,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968378817] [2021-06-05 05:10:27,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968378817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:27,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723097535] [2021-06-05 05:10:27,840 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 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 [2021-06-05 05:10:27,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:27,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:27,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:28,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723097535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:28,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:28,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 05:10:28,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254677791] [2021-06-05 05:10:28,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:28,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:28,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:28,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:28,348 INFO L87 Difference]: Start difference. First operand 339 states and 855 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) [2021-06-05 05:10:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:29,138 INFO L93 Difference]: Finished difference Result 453 states and 1076 transitions. [2021-06-05 05:10:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:10:29,138 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 20 [2021-06-05 05:10:29,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:29,138 INFO L225 Difference]: With dead ends: 453 [2021-06-05 05:10:29,138 INFO L226 Difference]: Without dead ends: 446 [2021-06-05 05:10:29,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1097.8ms TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:10:29,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2021-06-05 05:10:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 340. [2021-06-05 05:10:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.5309734513274336) internal successors, (858), 339 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 858 transitions. [2021-06-05 05:10:29,142 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 858 transitions. Word has length 20 [2021-06-05 05:10:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:29,142 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 858 transitions. [2021-06-05 05:10:29,142 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) [2021-06-05 05:10:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 858 transitions. [2021-06-05 05:10:29,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:29,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:29,142 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:29,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19011,749 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:29,343 INFO L430 AbstractCegarLoop]: === Iteration 767 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:29,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:29,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1178882397, now seen corresponding path program 746 times [2021-06-05 05:10:29,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:29,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980984632] [2021-06-05 05:10:29,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:29,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:29,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980984632] [2021-06-05 05:10:29,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980984632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:29,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549703721] [2021-06-05 05:10:29,538 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 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 [2021-06-05 05:10:29,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:29,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:29,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:29,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:29,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549703721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:29,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:29,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 05:10:29,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840802258] [2021-06-05 05:10:29,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:29,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:30,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:30,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:30,000 INFO L87 Difference]: Start difference. First operand 340 states and 858 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) [2021-06-05 05:10:30,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:30,564 INFO L93 Difference]: Finished difference Result 462 states and 1094 transitions. [2021-06-05 05:10:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:10:30,564 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 20 [2021-06-05 05:10:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:30,565 INFO L225 Difference]: With dead ends: 462 [2021-06-05 05:10:30,565 INFO L226 Difference]: Without dead ends: 455 [2021-06-05 05:10:30,565 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 711.6ms TimeCoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:10:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2021-06-05 05:10:30,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 341. [2021-06-05 05:10:30,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.5323529411764705) internal successors, (861), 340 states have internal predecessors, (861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 861 transitions. [2021-06-05 05:10:30,568 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 861 transitions. Word has length 20 [2021-06-05 05:10:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:30,568 INFO L482 AbstractCegarLoop]: Abstraction has 341 states and 861 transitions. [2021-06-05 05:10:30,568 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) [2021-06-05 05:10:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 861 transitions. [2021-06-05 05:10:30,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:30,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:30,568 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:30,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 750 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19058 [2021-06-05 05:10:30,769 INFO L430 AbstractCegarLoop]: === Iteration 768 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1419328545, now seen corresponding path program 747 times [2021-06-05 05:10:30,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:30,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636527846] [2021-06-05 05:10:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:30,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:30,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636527846] [2021-06-05 05:10:30,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636527846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:30,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147847511] [2021-06-05 05:10:30,929 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 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 [2021-06-05 05:10:30,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:10:30,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:30,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:30,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:31,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147847511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:31,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:31,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 05:10:31,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742832322] [2021-06-05 05:10:31,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:31,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:31,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:31,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:31,382 INFO L87 Difference]: Start difference. First operand 341 states and 861 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) [2021-06-05 05:10:32,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:32,031 INFO L93 Difference]: Finished difference Result 465 states and 1102 transitions. [2021-06-05 05:10:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:32,031 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 20 [2021-06-05 05:10:32,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:32,032 INFO L225 Difference]: With dead ends: 465 [2021-06-05 05:10:32,032 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 05:10:32,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 685.9ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:10:32,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 05:10:32,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 342. [2021-06-05 05:10:32,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 2.533724340175953) internal successors, (864), 341 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:32,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 864 transitions. [2021-06-05 05:10:32,035 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 864 transitions. Word has length 20 [2021-06-05 05:10:32,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:32,035 INFO L482 AbstractCegarLoop]: Abstraction has 342 states and 864 transitions. [2021-06-05 05:10:32,035 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) [2021-06-05 05:10:32,035 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 864 transitions. [2021-06-05 05:10:32,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:32,035 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:32,035 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:32,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19092,751 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:32,236 INFO L430 AbstractCegarLoop]: === Iteration 769 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:32,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:32,236 INFO L82 PathProgramCache]: Analyzing trace with hash -2119821533, now seen corresponding path program 748 times [2021-06-05 05:10:32,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:32,236 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533679393] [2021-06-05 05:10:32,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:32,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:32,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533679393] [2021-06-05 05:10:32,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533679393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:32,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172461130] [2021-06-05 05:10:32,517 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 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 [2021-06-05 05:10:32,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:32,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:32,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:32,930 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:32,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172461130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:32,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:32,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 05:10:32,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133774937] [2021-06-05 05:10:32,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:32,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:32,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:32,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:32,931 INFO L87 Difference]: Start difference. First operand 342 states and 864 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) [2021-06-05 05:10:33,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:33,511 INFO L93 Difference]: Finished difference Result 477 states and 1122 transitions. [2021-06-05 05:10:33,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:33,511 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 20 [2021-06-05 05:10:33,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:33,511 INFO L225 Difference]: With dead ends: 477 [2021-06-05 05:10:33,511 INFO L226 Difference]: Without dead ends: 470 [2021-06-05 05:10:33,512 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:10:33,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-06-05 05:10:33,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 343. [2021-06-05 05:10:33,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.538011695906433) internal successors, (868), 342 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 868 transitions. [2021-06-05 05:10:33,515 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 868 transitions. Word has length 20 [2021-06-05 05:10:33,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:33,515 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 868 transitions. [2021-06-05 05:10:33,515 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) [2021-06-05 05:10:33,515 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 868 transitions. [2021-06-05 05:10:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:33,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:33,515 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:33,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 752 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19139 [2021-06-05 05:10:33,716 INFO L430 AbstractCegarLoop]: === Iteration 770 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:33,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:33,716 INFO L82 PathProgramCache]: Analyzing trace with hash -428236897, now seen corresponding path program 749 times [2021-06-05 05:10:33,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:33,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102369997] [2021-06-05 05:10:33,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:33,894 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:33,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102369997] [2021-06-05 05:10:33,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102369997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:33,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006113294] [2021-06-05 05:10:33,894 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 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 [2021-06-05 05:10:33,925 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:33,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:33,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:33,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:34,305 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:34,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006113294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:34,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:34,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 05:10:34,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128115185] [2021-06-05 05:10:34,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:34,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:34,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:34,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:34,306 INFO L87 Difference]: Start difference. First operand 343 states and 868 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) [2021-06-05 05:10:34,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:34,884 INFO L93 Difference]: Finished difference Result 465 states and 1104 transitions. [2021-06-05 05:10:34,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:34,884 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 [2021-06-05 05:10:34,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:34,885 INFO L225 Difference]: With dead ends: 465 [2021-06-05 05:10:34,885 INFO L226 Difference]: Without dead ends: 458 [2021-06-05 05:10:34,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 615.0ms TimeCoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:10:34,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-06-05 05:10:34,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 340. [2021-06-05 05:10:34,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.5309734513274336) internal successors, (858), 339 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 858 transitions. [2021-06-05 05:10:34,888 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 858 transitions. Word has length 20 [2021-06-05 05:10:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:34,888 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 858 transitions. [2021-06-05 05:10:34,888 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) [2021-06-05 05:10:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 858 transitions. [2021-06-05 05:10:34,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:34,889 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:34,889 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:35,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19186,753 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:35,089 INFO L430 AbstractCegarLoop]: === Iteration 771 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:35,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:35,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2043892067, now seen corresponding path program 750 times [2021-06-05 05:10:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:35,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022144589] [2021-06-05 05:10:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:35,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:35,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022144589] [2021-06-05 05:10:35,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022144589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140131518] [2021-06-05 05:10:35,340 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 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 [2021-06-05 05:10:35,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:10:35,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:35,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:35,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:35,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:35,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140131518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:35,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:35,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:10:35,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390661775] [2021-06-05 05:10:35,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:35,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:35,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:35,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:35,787 INFO L87 Difference]: Start difference. First operand 340 states and 858 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-06-05 05:10:36,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:36,581 INFO L93 Difference]: Finished difference Result 520 states and 1189 transitions. [2021-06-05 05:10:36,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:10:36,581 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 [2021-06-05 05:10:36,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:36,581 INFO L225 Difference]: With dead ends: 520 [2021-06-05 05:10:36,582 INFO L226 Difference]: Without dead ends: 513 [2021-06-05 05:10:36,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2021-06-05 05:10:36,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 343. [2021-06-05 05:10:36,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.5321637426900585) internal successors, (866), 342 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 866 transitions. [2021-06-05 05:10:36,585 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 866 transitions. Word has length 20 [2021-06-05 05:10:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:36,585 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 866 transitions. [2021-06-05 05:10:36,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-06-05 05:10:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 866 transitions. [2021-06-05 05:10:36,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:36,586 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:36,586 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:36,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 754 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19232 [2021-06-05 05:10:36,786 INFO L430 AbstractCegarLoop]: === Iteration 772 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:36,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:36,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1803445919, now seen corresponding path program 751 times [2021-06-05 05:10:36,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:36,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148892600] [2021-06-05 05:10:36,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:36,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:36,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148892600] [2021-06-05 05:10:36,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148892600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:36,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187293709] [2021-06-05 05:10:36,963 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 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 [2021-06-05 05:10:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:37,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:37,427 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:37,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187293709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:37,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:37,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 05:10:37,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347049002] [2021-06-05 05:10:37,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:37,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:37,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:37,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:37,427 INFO L87 Difference]: Start difference. First operand 343 states and 866 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) [2021-06-05 05:10:38,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:38,201 INFO L93 Difference]: Finished difference Result 530 states and 1208 transitions. [2021-06-05 05:10:38,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:38,201 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 20 [2021-06-05 05:10:38,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:38,202 INFO L225 Difference]: With dead ends: 530 [2021-06-05 05:10:38,202 INFO L226 Difference]: Without dead ends: 523 [2021-06-05 05:10:38,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 847.9ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:10:38,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-06-05 05:10:38,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 343. [2021-06-05 05:10:38,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.5321637426900585) internal successors, (866), 342 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:38,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 866 transitions. [2021-06-05 05:10:38,205 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 866 transitions. Word has length 20 [2021-06-05 05:10:38,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:38,206 INFO L482 AbstractCegarLoop]: Abstraction has 343 states and 866 transitions. [2021-06-05 05:10:38,206 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) [2021-06-05 05:10:38,206 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 866 transitions. [2021-06-05 05:10:38,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:38,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:38,206 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:38,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19266,755 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:38,407 INFO L430 AbstractCegarLoop]: === Iteration 773 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:38,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:38,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1102952931, now seen corresponding path program 752 times [2021-06-05 05:10:38,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:38,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805424768] [2021-06-05 05:10:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:38,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:38,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805424768] [2021-06-05 05:10:38,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805424768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:38,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924868664] [2021-06-05 05:10:38,664 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 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 [2021-06-05 05:10:38,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:38,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:38,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:38,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:39,069 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:39,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924868664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:39,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:39,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 05:10:39,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794790369] [2021-06-05 05:10:39,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:39,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:39,070 INFO L87 Difference]: Start difference. First operand 343 states and 866 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) [2021-06-05 05:10:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:40,065 INFO L93 Difference]: Finished difference Result 510 states and 1174 transitions. [2021-06-05 05:10:40,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:40,066 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 20 [2021-06-05 05:10:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:40,066 INFO L225 Difference]: With dead ends: 510 [2021-06-05 05:10:40,066 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 05:10:40,066 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1062.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1256, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:10:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 05:10:40,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 340. [2021-06-05 05:10:40,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.533923303834808) internal successors, (859), 339 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:40,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 859 transitions. [2021-06-05 05:10:40,070 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 859 transitions. Word has length 20 [2021-06-05 05:10:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:40,070 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 859 transitions. [2021-06-05 05:10:40,070 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) [2021-06-05 05:10:40,070 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 859 transitions. [2021-06-05 05:10:40,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:40,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:40,070 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:40,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 756 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19300 [2021-06-05 05:10:40,270 INFO L430 AbstractCegarLoop]: === Iteration 774 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:40,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:40,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1500429729, now seen corresponding path program 753 times [2021-06-05 05:10:40,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:40,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286816351] [2021-06-05 05:10:40,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:40,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:40,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:40,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286816351] [2021-06-05 05:10:40,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286816351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:40,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259368953] [2021-06-05 05:10:40,416 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 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 [2021-06-05 05:10:40,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:10:40,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:40,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:10:40,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:40,864 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2021-06-05 05:10:40,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:40,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259368953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:40,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:40,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 05:10:40,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265756209] [2021-06-05 05:10:40,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:40,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:40,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:40,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:40,985 INFO L87 Difference]: Start difference. First operand 340 states and 859 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) [2021-06-05 05:10:41,613 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2021-06-05 05:10:41,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:41,795 INFO L93 Difference]: Finished difference Result 490 states and 1140 transitions. [2021-06-05 05:10:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:10:41,795 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 [2021-06-05 05:10:41,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:41,796 INFO L225 Difference]: With dead ends: 490 [2021-06-05 05:10:41,796 INFO L226 Difference]: Without dead ends: 483 [2021-06-05 05:10:41,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 1037.3ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:10:41,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-06-05 05:10:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 340. [2021-06-05 05:10:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.533923303834808) internal successors, (859), 339 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:41,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 859 transitions. [2021-06-05 05:10:41,799 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 859 transitions. Word has length 20 [2021-06-05 05:10:41,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:41,799 INFO L482 AbstractCegarLoop]: Abstraction has 340 states and 859 transitions. [2021-06-05 05:10:41,799 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) [2021-06-05 05:10:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 859 transitions. [2021-06-05 05:10:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:41,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:41,800 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:42,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 757 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19334 [2021-06-05 05:10:42,000 INFO L430 AbstractCegarLoop]: === Iteration 775 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:42,001 INFO L82 PathProgramCache]: Analyzing trace with hash -863540257, now seen corresponding path program 754 times [2021-06-05 05:10:42,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:42,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045293670] [2021-06-05 05:10:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:42,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:42,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045293670] [2021-06-05 05:10:42,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045293670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505602561] [2021-06-05 05:10:42,142 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 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 [2021-06-05 05:10:42,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:42,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:42,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:42,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:42,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505602561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:42,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:42,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 05:10:42,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872554249] [2021-06-05 05:10:42,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:10:42,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:42,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:10:42,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:10:42,551 INFO L87 Difference]: Start difference. First operand 340 states and 859 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) [2021-06-05 05:10:43,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:43,206 INFO L93 Difference]: Finished difference Result 581 states and 1320 transitions. [2021-06-05 05:10:43,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:10:43,206 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 20 [2021-06-05 05:10:43,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:43,207 INFO L225 Difference]: With dead ends: 581 [2021-06-05 05:10:43,207 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 05:10:43,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 693.2ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:43,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 05:10:43,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 360. [2021-06-05 05:10:43,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.5459610027855155) internal successors, (914), 359 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:43,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 914 transitions. [2021-06-05 05:10:43,211 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 914 transitions. Word has length 20 [2021-06-05 05:10:43,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:43,211 INFO L482 AbstractCegarLoop]: Abstraction has 360 states and 914 transitions. [2021-06-05 05:10:43,211 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) [2021-06-05 05:10:43,211 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 914 transitions. [2021-06-05 05:10:43,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:43,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:43,211 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:43,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 758 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19369 [2021-06-05 05:10:43,412 INFO L430 AbstractCegarLoop]: === Iteration 776 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:43,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:43,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1564033245, now seen corresponding path program 755 times [2021-06-05 05:10:43,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:43,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038981091] [2021-06-05 05:10:43,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:43,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:43,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038981091] [2021-06-05 05:10:43,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038981091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:43,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535193568] [2021-06-05 05:10:43,678 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 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 [2021-06-05 05:10:43,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:10:43,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:43,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:43,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:44,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535193568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:44,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:44,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:44,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304651249] [2021-06-05 05:10:44,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:44,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:44,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:44,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:44,104 INFO L87 Difference]: Start difference. First operand 360 states and 914 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:10:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:44,573 INFO L93 Difference]: Finished difference Result 482 states and 1149 transitions. [2021-06-05 05:10:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 [2021-06-05 05:10:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:44,573 INFO L225 Difference]: With dead ends: 482 [2021-06-05 05:10:44,573 INFO L226 Difference]: Without dead ends: 475 [2021-06-05 05:10:44,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:10:44,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-06-05 05:10:44,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 366. [2021-06-05 05:10:44,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 2.5452054794520547) internal successors, (929), 365 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:44,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 929 transitions. [2021-06-05 05:10:44,577 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 929 transitions. Word has length 20 [2021-06-05 05:10:44,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:44,577 INFO L482 AbstractCegarLoop]: Abstraction has 366 states and 929 transitions. [2021-06-05 05:10:44,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:10:44,577 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 929 transitions. [2021-06-05 05:10:44,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:44,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:44,578 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:44,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 759 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19415 [2021-06-05 05:10:44,778 INFO L430 AbstractCegarLoop]: === Iteration 777 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:44,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:44,778 INFO L82 PathProgramCache]: Analyzing trace with hash 127551391, now seen corresponding path program 756 times [2021-06-05 05:10:44,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:44,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082644896] [2021-06-05 05:10:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:45,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:45,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082644896] [2021-06-05 05:10:45,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082644896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:45,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013134249] [2021-06-05 05:10:45,034 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 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 [2021-06-05 05:10:45,064 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:10:45,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:45,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:45,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:45,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013134249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:45,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:45,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:10:45,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075999927] [2021-06-05 05:10:45,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:45,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:45,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:45,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:45,434 INFO L87 Difference]: Start difference. First operand 366 states and 929 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-06-05 05:10:46,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:46,313 INFO L93 Difference]: Finished difference Result 606 states and 1367 transitions. [2021-06-05 05:10:46,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:46,314 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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 [2021-06-05 05:10:46,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:46,314 INFO L225 Difference]: With dead ends: 606 [2021-06-05 05:10:46,314 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 05:10:46,314 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 916.4ms TimeCoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:10:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 05:10:46,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 367. [2021-06-05 05:10:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.5491803278688523) internal successors, (933), 366 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 933 transitions. [2021-06-05 05:10:46,318 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 933 transitions. Word has length 20 [2021-06-05 05:10:46,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:46,318 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 933 transitions. [2021-06-05 05:10:46,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 21 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) [2021-06-05 05:10:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 933 transitions. [2021-06-05 05:10:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:46,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:46,319 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:46,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19461,760 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:46,519 INFO L430 AbstractCegarLoop]: === Iteration 778 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:46,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:46,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2099263047, now seen corresponding path program 757 times [2021-06-05 05:10:46,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:46,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732468653] [2021-06-05 05:10:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:46,657 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:46,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:46,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732468653] [2021-06-05 05:10:46,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732468653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:46,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235089882] [2021-06-05 05:10:46,658 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 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 [2021-06-05 05:10:46,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:46,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:46,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:47,057 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235089882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:47,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:47,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 19 [2021-06-05 05:10:47,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846570899] [2021-06-05 05:10:47,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:10:47,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:47,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:10:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:10:47,058 INFO L87 Difference]: Start difference. First operand 367 states and 933 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) [2021-06-05 05:10:47,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:47,717 INFO L93 Difference]: Finished difference Result 584 states and 1332 transitions. [2021-06-05 05:10:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:10:47,717 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 [2021-06-05 05:10:47,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:47,718 INFO L225 Difference]: With dead ends: 584 [2021-06-05 05:10:47,718 INFO L226 Difference]: Without dead ends: 577 [2021-06-05 05:10:47,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 580.3ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:10:47,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-06-05 05:10:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 368. [2021-06-05 05:10:47,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 2.553133514986376) internal successors, (937), 367 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:47,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 937 transitions. [2021-06-05 05:10:47,722 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 937 transitions. Word has length 20 [2021-06-05 05:10:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:47,722 INFO L482 AbstractCegarLoop]: Abstraction has 368 states and 937 transitions. [2021-06-05 05:10:47,722 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) [2021-06-05 05:10:47,722 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 937 transitions. [2021-06-05 05:10:47,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:47,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:47,722 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:47,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19508,761 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:47,923 INFO L430 AbstractCegarLoop]: === Iteration 779 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:47,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:47,923 INFO L82 PathProgramCache]: Analyzing trace with hash -407678411, now seen corresponding path program 758 times [2021-06-05 05:10:47,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:47,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889657081] [2021-06-05 05:10:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:48,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:48,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889657081] [2021-06-05 05:10:48,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889657081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:48,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504948081] [2021-06-05 05:10:48,183 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 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 [2021-06-05 05:10:48,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:48,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:48,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:48,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:48,709 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,710 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,710 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 31 treesize of output 23 [2021-06-05 05:10:48,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,716 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,716 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 37 treesize of output 27 [2021-06-05 05:10:48,717 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,721 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,722 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 37 treesize of output 27 [2021-06-05 05:10:48,723 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,729 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 37 treesize of output 27 [2021-06-05 05:10:48,730 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,735 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 29 treesize of output 21 [2021-06-05 05:10:48,736 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,741 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 36 treesize of output 26 [2021-06-05 05:10:48,742 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-06-05 05:10:48,748 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,753 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-06-05 05:10:48,754 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,759 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,760 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 37 treesize of output 27 [2021-06-05 05:10:48,761 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,766 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 30 treesize of output 22 [2021-06-05 05:10:48,767 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,773 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 30 treesize of output 22 [2021-06-05 05:10:48,773 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,779 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 30 treesize of output 22 [2021-06-05 05:10:48,780 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,784 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,785 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 30 treesize of output 22 [2021-06-05 05:10:48,786 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,791 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,791 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 38 treesize of output 28 [2021-06-05 05:10:48,792 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,797 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,798 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 30 treesize of output 22 [2021-06-05 05:10:48,798 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,804 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 37 treesize of output 27 [2021-06-05 05:10:48,805 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,810 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 38 treesize of output 28 [2021-06-05 05:10:48,811 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,815 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,816 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 38 treesize of output 28 [2021-06-05 05:10:48,817 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,821 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,822 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 44 treesize of output 32 [2021-06-05 05:10:48,823 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,827 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,828 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 31 treesize of output 23 [2021-06-05 05:10:48,829 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,833 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,834 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,834 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 43 treesize of output 31 [2021-06-05 05:10:48,835 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,839 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:48,839 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,843 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:48,844 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,849 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 31 treesize of output 23 [2021-06-05 05:10:48,849 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,854 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 38 treesize of output 28 [2021-06-05 05:10:48,855 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,860 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,860 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 30 treesize of output 22 [2021-06-05 05:10:48,861 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,865 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 31 treesize of output 23 [2021-06-05 05:10:48,866 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,871 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,871 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 37 treesize of output 27 [2021-06-05 05:10:48,871 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,875 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:48,876 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,880 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 37 treesize of output 27 [2021-06-05 05:10:48,881 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:10:48,886 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,890 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 30 treesize of output 22 [2021-06-05 05:10:48,891 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,895 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:48,896 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,900 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:48,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:10:48,901 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,904 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:48,905 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:48,908 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:48,909 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:49,006 INFO L628 ElimStorePlain]: treesize reduction 559, result has 12.4 percent of original size [2021-06-05 05:10:49,006 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:10:49,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:10:49,007 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 3 variables, input treesize:2161, output treesize:55 [2021-06-05 05:10:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:49,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504948081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:49,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:49,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 05:10:49,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070628031] [2021-06-05 05:10:49,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:49,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:49,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:49,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:49,137 INFO L87 Difference]: Start difference. First operand 368 states and 937 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) [2021-06-05 05:10:50,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:50,225 INFO L93 Difference]: Finished difference Result 613 states and 1377 transitions. [2021-06-05 05:10:50,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:50,226 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 20 [2021-06-05 05:10:50,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:50,226 INFO L225 Difference]: With dead ends: 613 [2021-06-05 05:10:50,226 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 05:10:50,226 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1130.7ms TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:10:50,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 05:10:50,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 367. [2021-06-05 05:10:50,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.5491803278688523) internal successors, (933), 366 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:50,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 933 transitions. [2021-06-05 05:10:50,230 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 933 transitions. Word has length 20 [2021-06-05 05:10:50,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:50,230 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 933 transitions. [2021-06-05 05:10:50,230 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) [2021-06-05 05:10:50,230 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 933 transitions. [2021-06-05 05:10:50,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:50,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:50,231 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:50,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19607,762 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:50,431 INFO L430 AbstractCegarLoop]: === Iteration 780 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:50,431 INFO L82 PathProgramCache]: Analyzing trace with hash -234430719, now seen corresponding path program 759 times [2021-06-05 05:10:50,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:50,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689810896] [2021-06-05 05:10:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:10:50,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:50,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689810896] [2021-06-05 05:10:50,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689810896] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:50,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918619876] [2021-06-05 05:10:50,595 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 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 [2021-06-05 05:10:50,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:10:50,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:50,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:10:50,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:51,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,039 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 30 treesize of output 22 [2021-06-05 05:10:51,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,044 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 37 treesize of output 27 [2021-06-05 05:10:51,045 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,050 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 29 treesize of output 21 [2021-06-05 05:10:51,050 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,054 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,054 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 23 treesize of output 17 [2021-06-05 05:10:51,055 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,059 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 31 treesize of output 23 [2021-06-05 05:10:51,060 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,064 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,065 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 29 treesize of output 21 [2021-06-05 05:10:51,066 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,069 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,070 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 31 treesize of output 23 [2021-06-05 05:10:51,071 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,075 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 23 treesize of output 17 [2021-06-05 05:10:51,076 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,080 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 38 treesize of output 28 [2021-06-05 05:10:51,081 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,085 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 22 treesize of output 16 [2021-06-05 05:10:51,086 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,090 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 30 treesize of output 22 [2021-06-05 05:10:51,091 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,096 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 22 treesize of output 16 [2021-06-05 05:10:51,096 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,112 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,112 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 37 treesize of output 27 [2021-06-05 05:10:51,113 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,117 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 30 treesize of output 22 [2021-06-05 05:10:51,118 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,123 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 30 treesize of output 22 [2021-06-05 05:10:51,123 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:10:51,128 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,132 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:10:51,133 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 36 treesize of output 26 [2021-06-05 05:10:51,133 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,136 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:10:51,137 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:10:51,229 INFO L628 ElimStorePlain]: treesize reduction 353, result has 18.5 percent of original size [2021-06-05 05:10:51,229 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:10:51,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:10:51,231 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:997, output treesize:86 [2021-06-05 05:10:51,349 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:51,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918619876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:51,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:51,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 05:10:51,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119030585] [2021-06-05 05:10:51,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:51,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:51,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:51,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:51,349 INFO L87 Difference]: Start difference. First operand 367 states and 933 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) [2021-06-05 05:10:52,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:52,077 INFO L93 Difference]: Finished difference Result 576 states and 1315 transitions. [2021-06-05 05:10:52,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:10:52,077 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 20 [2021-06-05 05:10:52,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:52,078 INFO L225 Difference]: With dead ends: 576 [2021-06-05 05:10:52,078 INFO L226 Difference]: Without dead ends: 562 [2021-06-05 05:10:52,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 839.3ms TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:10:52,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-06-05 05:10:52,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 367. [2021-06-05 05:10:52,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 2.5491803278688523) internal successors, (933), 366 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:52,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 933 transitions. [2021-06-05 05:10:52,081 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 933 transitions. Word has length 20 [2021-06-05 05:10:52,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:52,081 INFO L482 AbstractCegarLoop]: Abstraction has 367 states and 933 transitions. [2021-06-05 05:10:52,081 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) [2021-06-05 05:10:52,082 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 933 transitions. [2021-06-05 05:10:52,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:52,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:52,082 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:52,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 763 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19754 [2021-06-05 05:10:52,282 INFO L430 AbstractCegarLoop]: === Iteration 781 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1511517725, now seen corresponding path program 760 times [2021-06-05 05:10:52,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:52,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860254938] [2021-06-05 05:10:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:52,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:52,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:52,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:52,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860254938] [2021-06-05 05:10:52,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860254938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:52,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790323870] [2021-06-05 05:10:52,447 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 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 [2021-06-05 05:10:52,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:10:52,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:52,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:52,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:53,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790323870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:53,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:53,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:53,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40106158] [2021-06-05 05:10:53,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:53,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:53,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:53,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=410, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:53,022 INFO L87 Difference]: Start difference. First operand 367 states and 933 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:10:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:54,051 INFO L93 Difference]: Finished difference Result 645 states and 1451 transitions. [2021-06-05 05:10:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:10:54,051 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 [2021-06-05 05:10:54,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:54,052 INFO L225 Difference]: With dead ends: 645 [2021-06-05 05:10:54,052 INFO L226 Difference]: Without dead ends: 638 [2021-06-05 05:10:54,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 1003.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:10:54,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-06-05 05:10:54,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 374. [2021-06-05 05:10:54,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.5683646112600536) internal successors, (958), 373 states have internal predecessors, (958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:54,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 958 transitions. [2021-06-05 05:10:54,056 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 958 transitions. Word has length 20 [2021-06-05 05:10:54,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:54,056 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 958 transitions. [2021-06-05 05:10:54,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:10:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 958 transitions. [2021-06-05 05:10:54,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:54,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:54,056 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:54,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 764 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19848 [2021-06-05 05:10:54,257 INFO L430 AbstractCegarLoop]: === Iteration 782 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash 180066911, now seen corresponding path program 761 times [2021-06-05 05:10:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:54,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641623303] [2021-06-05 05:10:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:54,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:54,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641623303] [2021-06-05 05:10:54,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641623303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:54,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708718094] [2021-06-05 05:10:54,519 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 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 [2021-06-05 05:10:54,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:10:54,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:54,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:54,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:55,076 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:55,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708718094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:55,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:55,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:10:55,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384802765] [2021-06-05 05:10:55,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:10:55,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:55,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:10:55,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:10:55,077 INFO L87 Difference]: Start difference. First operand 374 states and 958 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) [2021-06-05 05:10:56,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:56,277 INFO L93 Difference]: Finished difference Result 649 states and 1456 transitions. [2021-06-05 05:10:56,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:10:56,278 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 [2021-06-05 05:10:56,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:56,278 INFO L225 Difference]: With dead ends: 649 [2021-06-05 05:10:56,279 INFO L226 Difference]: Without dead ends: 642 [2021-06-05 05:10:56,279 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 1175.7ms TimeCoverageRelationStatistics Valid=168, Invalid=1638, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:10:56,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-06-05 05:10:56,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 373. [2021-06-05 05:10:56,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 372 states have (on average 2.564516129032258) internal successors, (954), 372 states have internal predecessors, (954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:56,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 954 transitions. [2021-06-05 05:10:56,283 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 954 transitions. Word has length 20 [2021-06-05 05:10:56,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:56,283 INFO L482 AbstractCegarLoop]: Abstraction has 373 states and 954 transitions. [2021-06-05 05:10:56,283 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) [2021-06-05 05:10:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 954 transitions. [2021-06-05 05:10:56,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:56,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:56,283 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:56,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 765 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19996 [2021-06-05 05:10:56,484 INFO L430 AbstractCegarLoop]: === Iteration 783 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:56,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:56,484 INFO L82 PathProgramCache]: Analyzing trace with hash 353314603, now seen corresponding path program 762 times [2021-06-05 05:10:56,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:56,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110088364] [2021-06-05 05:10:56,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:56,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:56,762 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:56,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110088364] [2021-06-05 05:10:56,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110088364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:56,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103511239] [2021-06-05 05:10:56,762 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 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 [2021-06-05 05:10:56,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:10:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:56,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:56,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:57,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:57,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103511239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:57,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:57,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:10:57,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123831968] [2021-06-05 05:10:57,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:10:57,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:57,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:10:57,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:10:57,296 INFO L87 Difference]: Start difference. First operand 373 states and 954 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-06-05 05:10:57,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:57,860 INFO L93 Difference]: Finished difference Result 480 states and 1164 transitions. [2021-06-05 05:10:57,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:10:57,860 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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 20 [2021-06-05 05:10:57,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:57,861 INFO L225 Difference]: With dead ends: 480 [2021-06-05 05:10:57,861 INFO L226 Difference]: Without dead ends: 473 [2021-06-05 05:10:57,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 782.0ms TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:10:57,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-06-05 05:10:57,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 374. [2021-06-05 05:10:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 373 states have (on average 2.5656836461126007) internal successors, (957), 373 states have internal predecessors, (957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:57,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 957 transitions. [2021-06-05 05:10:57,865 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 957 transitions. Word has length 20 [2021-06-05 05:10:57,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:57,865 INFO L482 AbstractCegarLoop]: Abstraction has 374 states and 957 transitions. [2021-06-05 05:10:57,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-06-05 05:10:57,865 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 957 transitions. [2021-06-05 05:10:57,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:57,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:57,865 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:58,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 766 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20128 [2021-06-05 05:10:58,065 INFO L430 AbstractCegarLoop]: === Iteration 784 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:58,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:58,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1429025759, now seen corresponding path program 763 times [2021-06-05 05:10:58,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:58,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454636148] [2021-06-05 05:10:58,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:58,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454636148] [2021-06-05 05:10:58,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454636148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678386302] [2021-06-05 05:10:58,226 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 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 [2021-06-05 05:10:58,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:58,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:10:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:58,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678386302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:58,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:10:58,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:10:58,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090454175] [2021-06-05 05:10:58,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:10:58,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:10:58,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:10:58,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:10:58,682 INFO L87 Difference]: Start difference. First operand 374 states and 957 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:10:59,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:10:59,317 INFO L93 Difference]: Finished difference Result 609 states and 1381 transitions. [2021-06-05 05:10:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:10:59,317 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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 [2021-06-05 05:10:59,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:10:59,318 INFO L225 Difference]: With dead ends: 609 [2021-06-05 05:10:59,318 INFO L226 Difference]: Without dead ends: 602 [2021-06-05 05:10:59,318 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 620.6ms TimeCoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:10:59,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-06-05 05:10:59,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 380. [2021-06-05 05:10:59,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.559366754617414) internal successors, (970), 379 states have internal predecessors, (970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:10:59,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 970 transitions. [2021-06-05 05:10:59,322 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 970 transitions. Word has length 20 [2021-06-05 05:10:59,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:10:59,322 INFO L482 AbstractCegarLoop]: Abstraction has 380 states and 970 transitions. [2021-06-05 05:10:59,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:10:59,322 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 970 transitions. [2021-06-05 05:10:59,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:10:59,322 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:10:59,322 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:10:59,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20251,767 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:10:59,523 INFO L430 AbstractCegarLoop]: === Iteration 785 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:10:59,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:10:59,523 INFO L82 PathProgramCache]: Analyzing trace with hash -301986543, now seen corresponding path program 764 times [2021-06-05 05:10:59,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:10:59,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471177844] [2021-06-05 05:10:59,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:10:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:10:59,774 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:10:59,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:10:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471177844] [2021-06-05 05:10:59,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471177844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:10:59,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256019473] [2021-06-05 05:10:59,774 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 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 [2021-06-05 05:10:59,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:10:59,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:10:59,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:10:59,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:00,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256019473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:00,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:00,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:11:00,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331898909] [2021-06-05 05:11:00,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:00,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:00,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:00,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:00,264 INFO L87 Difference]: Start difference. First operand 380 states and 970 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:11:00,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:00,830 INFO L93 Difference]: Finished difference Result 606 states and 1384 transitions. [2021-06-05 05:11:00,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:00,830 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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 [2021-06-05 05:11:00,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:00,831 INFO L225 Difference]: With dead ends: 606 [2021-06-05 05:11:00,831 INFO L226 Difference]: Without dead ends: 599 [2021-06-05 05:11:00,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 723.0ms TimeCoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:00,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 599 states. [2021-06-05 05:11:00,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 599 to 396. [2021-06-05 05:11:00,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.5924050632911393) internal successors, (1024), 395 states have internal predecessors, (1024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1024 transitions. [2021-06-05 05:11:00,835 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1024 transitions. Word has length 20 [2021-06-05 05:11:00,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:00,835 INFO L482 AbstractCegarLoop]: Abstraction has 396 states and 1024 transitions. [2021-06-05 05:11:00,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2021-06-05 05:11:00,835 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1024 transitions. [2021-06-05 05:11:00,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:00,835 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:00,835 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:01,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20342,768 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:01,036 INFO L430 AbstractCegarLoop]: === Iteration 786 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:01,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:01,036 INFO L82 PathProgramCache]: Analyzing trace with hash 557499213, now seen corresponding path program 765 times [2021-06-05 05:11:01,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:01,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078661825] [2021-06-05 05:11:01,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:01,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078661825] [2021-06-05 05:11:01,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078661825] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117682404] [2021-06-05 05:11:01,381 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 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 [2021-06-05 05:11:01,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:01,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:01,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:01,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:01,914 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:01,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117682404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:01,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:01,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:01,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558435119] [2021-06-05 05:11:01,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:01,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:01,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:01,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:01,915 INFO L87 Difference]: Start difference. First operand 396 states and 1024 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:02,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:02,656 INFO L93 Difference]: Finished difference Result 670 states and 1494 transitions. [2021-06-05 05:11:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:02,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 [2021-06-05 05:11:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:02,657 INFO L225 Difference]: With dead ends: 670 [2021-06-05 05:11:02,657 INFO L226 Difference]: Without dead ends: 663 [2021-06-05 05:11:02,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 999.6ms TimeCoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:02,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-06-05 05:11:02,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 400. [2021-06-05 05:11:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 2.598997493734336) internal successors, (1037), 399 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 1037 transitions. [2021-06-05 05:11:02,661 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 1037 transitions. Word has length 20 [2021-06-05 05:11:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:02,661 INFO L482 AbstractCegarLoop]: Abstraction has 400 states and 1037 transitions. [2021-06-05 05:11:02,661 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 1037 transitions. [2021-06-05 05:11:02,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:02,661 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:02,662 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:02,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 769 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20377 [2021-06-05 05:11:02,862 INFO L430 AbstractCegarLoop]: === Iteration 787 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:02,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:02,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1693603217, now seen corresponding path program 766 times [2021-06-05 05:11:02,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:02,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81462352] [2021-06-05 05:11:02,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:03,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:03,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81462352] [2021-06-05 05:11:03,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81462352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:03,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492993526] [2021-06-05 05:11:03,210 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 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 [2021-06-05 05:11:03,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:03,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:03,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:03,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:03,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:03,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492993526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:03,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:03,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:03,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551226041] [2021-06-05 05:11:03,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:03,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:03,715 INFO L87 Difference]: Start difference. First operand 400 states and 1037 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:04,623 INFO L93 Difference]: Finished difference Result 682 states and 1525 transitions. [2021-06-05 05:11:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:04,623 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 [2021-06-05 05:11:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:04,624 INFO L225 Difference]: With dead ends: 682 [2021-06-05 05:11:04,624 INFO L226 Difference]: Without dead ends: 675 [2021-06-05 05:11:04,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1064.2ms TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:04,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2021-06-05 05:11:04,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 403. [2021-06-05 05:11:04,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.6044776119402986) internal successors, (1047), 402 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:04,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1047 transitions. [2021-06-05 05:11:04,629 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1047 transitions. Word has length 20 [2021-06-05 05:11:04,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:04,629 INFO L482 AbstractCegarLoop]: Abstraction has 403 states and 1047 transitions. [2021-06-05 05:11:04,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:04,629 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1047 transitions. [2021-06-05 05:11:04,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:04,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:04,629 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:04,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 770 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20423 [2021-06-05 05:11:04,830 INFO L430 AbstractCegarLoop]: === Iteration 788 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:04,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:04,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1453157069, now seen corresponding path program 767 times [2021-06-05 05:11:04,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:04,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633436933] [2021-06-05 05:11:04,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:05,143 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:05,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:05,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633436933] [2021-06-05 05:11:05,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633436933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138050363] [2021-06-05 05:11:05,143 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 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 [2021-06-05 05:11:05,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:05,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:05,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:05,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:05,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138050363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:05,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:05,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:05,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008586322] [2021-06-05 05:11:05,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:05,674 INFO L87 Difference]: Start difference. First operand 403 states and 1047 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:06,940 INFO L93 Difference]: Finished difference Result 651 states and 1476 transitions. [2021-06-05 05:11:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:06,940 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 [2021-06-05 05:11:06,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:06,941 INFO L225 Difference]: With dead ends: 651 [2021-06-05 05:11:06,941 INFO L226 Difference]: Without dead ends: 644 [2021-06-05 05:11:06,941 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 1269.5ms TimeCoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:11:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2021-06-05 05:11:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 405. [2021-06-05 05:11:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.608910891089109) internal successors, (1054), 404 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1054 transitions. [2021-06-05 05:11:06,945 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1054 transitions. Word has length 20 [2021-06-05 05:11:06,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:06,945 INFO L482 AbstractCegarLoop]: Abstraction has 405 states and 1054 transitions. [2021-06-05 05:11:06,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1054 transitions. [2021-06-05 05:11:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:06,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:06,946 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:07,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 771 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20459 [2021-06-05 05:11:07,147 INFO L430 AbstractCegarLoop]: === Iteration 789 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash 752664081, now seen corresponding path program 768 times [2021-06-05 05:11:07,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:07,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454181650] [2021-06-05 05:11:07,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:07,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:07,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454181650] [2021-06-05 05:11:07,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454181650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:07,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38793202] [2021-06-05 05:11:07,388 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 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 [2021-06-05 05:11:07,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:07,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:07,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:07,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:07,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38793202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:07,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:07,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:11:07,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792145471] [2021-06-05 05:11:07,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:07,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:07,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:07,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:07,842 INFO L87 Difference]: Start difference. First operand 405 states and 1054 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:11:08,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:08,583 INFO L93 Difference]: Finished difference Result 633 states and 1451 transitions. [2021-06-05 05:11:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:11:08,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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 [2021-06-05 05:11:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:08,584 INFO L225 Difference]: With dead ends: 633 [2021-06-05 05:11:08,584 INFO L226 Difference]: Without dead ends: 626 [2021-06-05 05:11:08,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 715.6ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:08,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2021-06-05 05:11:08,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 407. [2021-06-05 05:11:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.6157635467980294) internal successors, (1062), 406 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1062 transitions. [2021-06-05 05:11:08,589 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1062 transitions. Word has length 20 [2021-06-05 05:11:08,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:08,589 INFO L482 AbstractCegarLoop]: Abstraction has 407 states and 1062 transitions. [2021-06-05 05:11:08,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:11:08,589 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1062 transitions. [2021-06-05 05:11:08,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:08,589 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:08,589 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:08,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 772 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20494 [2021-06-05 05:11:08,790 INFO L430 AbstractCegarLoop]: === Iteration 790 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1850718579, now seen corresponding path program 769 times [2021-06-05 05:11:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:08,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388325486] [2021-06-05 05:11:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:09,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:09,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388325486] [2021-06-05 05:11:09,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388325486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:09,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736672618] [2021-06-05 05:11:09,015 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 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 [2021-06-05 05:11:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:09,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:09,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736672618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:09,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:09,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:11:09,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512147511] [2021-06-05 05:11:09,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:09,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:09,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:09,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:09,501 INFO L87 Difference]: Start difference. First operand 407 states and 1062 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:11:10,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:10,234 INFO L93 Difference]: Finished difference Result 618 states and 1428 transitions. [2021-06-05 05:11:10,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:11:10,234 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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 [2021-06-05 05:11:10,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:10,235 INFO L225 Difference]: With dead ends: 618 [2021-06-05 05:11:10,235 INFO L226 Difference]: Without dead ends: 611 [2021-06-05 05:11:10,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 754.7ms TimeCoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:10,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-06-05 05:11:10,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 386. [2021-06-05 05:11:10,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.574025974025974) internal successors, (991), 385 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:10,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 991 transitions. [2021-06-05 05:11:10,240 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 991 transitions. Word has length 20 [2021-06-05 05:11:10,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:10,240 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 991 transitions. [2021-06-05 05:11:10,240 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:11:10,240 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 991 transitions. [2021-06-05 05:11:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:10,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:10,240 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:10,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 773 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20531 [2021-06-05 05:11:10,441 INFO L430 AbstractCegarLoop]: === Iteration 791 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:10,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:10,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1864754351, now seen corresponding path program 770 times [2021-06-05 05:11:10,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:10,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455153971] [2021-06-05 05:11:10,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:10,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:10,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455153971] [2021-06-05 05:11:10,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455153971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:10,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566560943] [2021-06-05 05:11:10,576 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 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 [2021-06-05 05:11:10,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:10,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:10,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:10,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:10,880 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:10,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566560943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:10,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:10,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-06-05 05:11:10,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364751647] [2021-06-05 05:11:10,880 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:10,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:10,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:10,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:10,881 INFO L87 Difference]: Start difference. First operand 386 states and 991 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:11,594 INFO L93 Difference]: Finished difference Result 601 states and 1416 transitions. [2021-06-05 05:11:11,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:11,594 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:11:11,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:11,595 INFO L225 Difference]: With dead ends: 601 [2021-06-05 05:11:11,595 INFO L226 Difference]: Without dead ends: 594 [2021-06-05 05:11:11,595 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 599.3ms TimeCoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:11:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-06-05 05:11:11,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 408. [2021-06-05 05:11:11,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.616707616707617) internal successors, (1065), 407 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 1065 transitions. [2021-06-05 05:11:11,600 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 1065 transitions. Word has length 20 [2021-06-05 05:11:11,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:11,600 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 1065 transitions. [2021-06-05 05:11:11,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:11,600 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 1065 transitions. [2021-06-05 05:11:11,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:11,600 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:11,600 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:11,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20569,774 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:11,801 INFO L430 AbstractCegarLoop]: === Iteration 792 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 52593497, now seen corresponding path program 771 times [2021-06-05 05:11:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19015949] [2021-06-05 05:11:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:11,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:12,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:12,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19015949] [2021-06-05 05:11:12,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19015949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170889519] [2021-06-05 05:11:12,079 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 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 [2021-06-05 05:11:12,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:11:12,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:12,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:12,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:12,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,552 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 30 treesize of output 22 [2021-06-05 05:11:12,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,557 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 37 treesize of output 27 [2021-06-05 05:11:12,558 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,562 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 23 treesize of output 17 [2021-06-05 05:11:12,563 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,567 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,568 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,568 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 29 treesize of output 21 [2021-06-05 05:11:12,569 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,573 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 23 treesize of output 17 [2021-06-05 05:11:12,574 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,578 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 30 treesize of output 22 [2021-06-05 05:11:12,579 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,583 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:11:12,584 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,588 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,589 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 29 treesize of output 21 [2021-06-05 05:11:12,589 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,594 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 30 treesize of output 22 [2021-06-05 05:11:12,595 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,599 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 38 treesize of output 28 [2021-06-05 05:11:12,601 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,605 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 36 treesize of output 26 [2021-06-05 05:11:12,606 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,611 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 22 treesize of output 16 [2021-06-05 05:11:12,612 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,618 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 22 treesize of output 16 [2021-06-05 05:11:12,618 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,623 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,624 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 37 treesize of output 27 [2021-06-05 05:11:12,625 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,629 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,630 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 31 treesize of output 23 [2021-06-05 05:11:12,631 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:12,636 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,641 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 31 treesize of output 23 [2021-06-05 05:11:12,642 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,646 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:12,646 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 30 treesize of output 22 [2021-06-05 05:11:12,647 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:12,738 INFO L628 ElimStorePlain]: treesize reduction 353, result has 18.5 percent of original size [2021-06-05 05:11:12,738 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:11:12,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:11:12,739 INFO L247 ElimStorePlain]: Needed 19 recursive calls to eliminate 3 variables, input treesize:997, output treesize:86 [2021-06-05 05:11:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:12,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170889519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:12,858 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:12,858 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-06-05 05:11:12,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114125028] [2021-06-05 05:11:12,858 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:12,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:12,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:12,858 INFO L87 Difference]: Start difference. First operand 408 states and 1065 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:13,964 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2021-06-05 05:11:14,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:14,433 INFO L93 Difference]: Finished difference Result 646 states and 1487 transitions. [2021-06-05 05:11:14,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:11:14,433 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 [2021-06-05 05:11:14,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:14,434 INFO L225 Difference]: With dead ends: 646 [2021-06-05 05:11:14,434 INFO L226 Difference]: Without dead ends: 620 [2021-06-05 05:11:14,434 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1604.1ms TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:11:14,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-06-05 05:11:14,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 414. [2021-06-05 05:11:14,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.624697336561743) internal successors, (1084), 413 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:14,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 1084 transitions. [2021-06-05 05:11:14,439 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 1084 transitions. Word has length 20 [2021-06-05 05:11:14,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:14,439 INFO L482 AbstractCegarLoop]: Abstraction has 414 states and 1084 transitions. [2021-06-05 05:11:14,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:14,439 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 1084 transitions. [2021-06-05 05:11:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:14,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:14,439 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:14,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20604,775 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:14,640 INFO L430 AbstractCegarLoop]: === Iteration 793 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:14,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:14,640 INFO L82 PathProgramCache]: Analyzing trace with hash -1140089929, now seen corresponding path program 772 times [2021-06-05 05:11:14,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:14,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973816756] [2021-06-05 05:11:14,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:14,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:14,798 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:14,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:14,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973816756] [2021-06-05 05:11:14,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973816756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:14,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992904953] [2021-06-05 05:11:14,798 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 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 [2021-06-05 05:11:14,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:14,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:14,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:14,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:15,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992904953] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:15,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:15,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:11:15,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141692119] [2021-06-05 05:11:15,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:15,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:15,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:15,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:15,266 INFO L87 Difference]: Start difference. First operand 414 states and 1084 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) [2021-06-05 05:11:15,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:15,747 INFO L93 Difference]: Finished difference Result 581 states and 1384 transitions. [2021-06-05 05:11:15,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:15,747 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 [2021-06-05 05:11:15,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:15,748 INFO L225 Difference]: With dead ends: 581 [2021-06-05 05:11:15,748 INFO L226 Difference]: Without dead ends: 574 [2021-06-05 05:11:15,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 611.2ms TimeCoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:11:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-06-05 05:11:15,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 422. [2021-06-05 05:11:15,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 421 states have (on average 2.634204275534442) internal successors, (1109), 421 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:15,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 1109 transitions. [2021-06-05 05:11:15,752 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 1109 transitions. Word has length 20 [2021-06-05 05:11:15,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:15,752 INFO L482 AbstractCegarLoop]: Abstraction has 422 states and 1109 transitions. [2021-06-05 05:11:15,752 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) [2021-06-05 05:11:15,752 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 1109 transitions. [2021-06-05 05:11:15,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:15,753 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:15,753 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:15,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 776 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20695 [2021-06-05 05:11:15,953 INFO L430 AbstractCegarLoop]: === Iteration 794 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:15,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:15,953 INFO L82 PathProgramCache]: Analyzing trace with hash -3985925, now seen corresponding path program 773 times [2021-06-05 05:11:15,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:15,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599414187] [2021-06-05 05:11:15,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:16,133 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:16,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599414187] [2021-06-05 05:11:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599414187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096762396] [2021-06-05 05:11:16,134 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 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 [2021-06-05 05:11:16,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:16,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:16,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 05:11:16,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:16,395 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2021-06-05 05:11:16,566 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 53 [2021-06-05 05:11:16,924 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2021-06-05 05:11:17,349 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 146 [2021-06-05 05:11:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:17,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096762396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:17,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:17,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 05:11:17,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347077197] [2021-06-05 05:11:17,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:17,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:17,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:17,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:17,729 INFO L87 Difference]: Start difference. First operand 422 states and 1109 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2021-06-05 05:11:18,513 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 161 [2021-06-05 05:11:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:18,963 INFO L93 Difference]: Finished difference Result 621 states and 1455 transitions. [2021-06-05 05:11:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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 [2021-06-05 05:11:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:18,964 INFO L225 Difference]: With dead ends: 621 [2021-06-05 05:11:18,964 INFO L226 Difference]: Without dead ends: 614 [2021-06-05 05:11:18,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1931.1ms TimeCoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:18,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2021-06-05 05:11:18,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 425. [2021-06-05 05:11:18,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 424 states have (on average 2.6391509433962264) internal successors, (1119), 424 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:18,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 1119 transitions. [2021-06-05 05:11:18,968 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 1119 transitions. Word has length 20 [2021-06-05 05:11:18,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:18,969 INFO L482 AbstractCegarLoop]: Abstraction has 425 states and 1119 transitions. [2021-06-05 05:11:18,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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) [2021-06-05 05:11:18,969 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 1119 transitions. [2021-06-05 05:11:18,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:18,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:18,969 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:19,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 777 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20742 [2021-06-05 05:11:19,169 INFO L430 AbstractCegarLoop]: === Iteration 795 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:19,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:19,170 INFO L82 PathProgramCache]: Analyzing trace with hash -244432073, now seen corresponding path program 774 times [2021-06-05 05:11:19,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:19,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989592986] [2021-06-05 05:11:19,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:19,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:19,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989592986] [2021-06-05 05:11:19,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989592986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:19,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142003968] [2021-06-05 05:11:19,333 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 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 [2021-06-05 05:11:19,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:19,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:19,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:19,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:19,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142003968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:19,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:19,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:11:19,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258818312] [2021-06-05 05:11:19,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:19,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:19,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:19,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:19,806 INFO L87 Difference]: Start difference. First operand 425 states and 1119 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) [2021-06-05 05:11:20,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:20,701 INFO L93 Difference]: Finished difference Result 630 states and 1477 transitions. [2021-06-05 05:11:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:11:20,702 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 [2021-06-05 05:11:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:20,702 INFO L225 Difference]: With dead ends: 630 [2021-06-05 05:11:20,702 INFO L226 Difference]: Without dead ends: 623 [2021-06-05 05:11:20,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 821.9ms TimeCoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:20,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-06-05 05:11:20,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 427. [2021-06-05 05:11:20,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 2.643192488262911) internal successors, (1126), 426 states have internal predecessors, (1126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 1126 transitions. [2021-06-05 05:11:20,706 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 1126 transitions. Word has length 20 [2021-06-05 05:11:20,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:20,707 INFO L482 AbstractCegarLoop]: Abstraction has 427 states and 1126 transitions. [2021-06-05 05:11:20,707 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) [2021-06-05 05:11:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 1126 transitions. [2021-06-05 05:11:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:20,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:20,707 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:20,907 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20815,778 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:20,907 INFO L430 AbstractCegarLoop]: === Iteration 796 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:20,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:20,908 INFO L82 PathProgramCache]: Analyzing trace with hash -944925061, now seen corresponding path program 775 times [2021-06-05 05:11:20,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:20,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046619489] [2021-06-05 05:11:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:21,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046619489] [2021-06-05 05:11:21,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046619489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537422480] [2021-06-05 05:11:21,238 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 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 [2021-06-05 05:11:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:21,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:21,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:21,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537422480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:21,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:21,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:11:21,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340881149] [2021-06-05 05:11:21,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:21,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:21,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:21,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:21,656 INFO L87 Difference]: Start difference. First operand 427 states and 1126 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) [2021-06-05 05:11:22,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:22,533 INFO L93 Difference]: Finished difference Result 616 states and 1457 transitions. [2021-06-05 05:11:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:22,533 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 20 [2021-06-05 05:11:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:22,534 INFO L225 Difference]: With dead ends: 616 [2021-06-05 05:11:22,534 INFO L226 Difference]: Without dead ends: 606 [2021-06-05 05:11:22,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 987.3ms TimeCoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-06-05 05:11:22,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2021-06-05 05:11:22,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 421. [2021-06-05 05:11:22,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.6547619047619047) internal successors, (1115), 420 states have internal predecessors, (1115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:22,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1115 transitions. [2021-06-05 05:11:22,538 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1115 transitions. Word has length 20 [2021-06-05 05:11:22,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:22,539 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1115 transitions. [2021-06-05 05:11:22,539 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) [2021-06-05 05:11:22,539 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1115 transitions. [2021-06-05 05:11:22,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:22,539 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:22,539 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:22,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 779 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20862 [2021-06-05 05:11:22,739 INFO L430 AbstractCegarLoop]: === Iteration 797 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:22,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:22,740 INFO L82 PathProgramCache]: Analyzing trace with hash 746659575, now seen corresponding path program 776 times [2021-06-05 05:11:22,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:22,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505012140] [2021-06-05 05:11:22,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:23,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505012140] [2021-06-05 05:11:23,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505012140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074237349] [2021-06-05 05:11:23,086 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 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 [2021-06-05 05:11:23,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:23,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:23,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:23,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:23,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:23,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074237349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:23,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:23,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2021-06-05 05:11:23,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325931676] [2021-06-05 05:11:23,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:23,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:23,518 INFO L87 Difference]: Start difference. First operand 421 states and 1115 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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) [2021-06-05 05:11:24,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:24,676 INFO L93 Difference]: Finished difference Result 592 states and 1416 transitions. [2021-06-05 05:11:24,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:24,676 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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 [2021-06-05 05:11:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:24,677 INFO L225 Difference]: With dead ends: 592 [2021-06-05 05:11:24,677 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 05:11:24,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 1269.8ms TimeCoverageRelationStatistics Valid=126, Invalid=1134, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:11:24,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 05:11:24,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 418. [2021-06-05 05:11:24,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 2.647482014388489) internal successors, (1104), 417 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:24,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1104 transitions. [2021-06-05 05:11:24,681 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1104 transitions. Word has length 20 [2021-06-05 05:11:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:24,681 INFO L482 AbstractCegarLoop]: Abstraction has 418 states and 1104 transitions. [2021-06-05 05:11:24,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 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) [2021-06-05 05:11:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1104 transitions. [2021-06-05 05:11:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:24,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:24,682 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:24,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20898,780 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:24,885 INFO L430 AbstractCegarLoop]: === Iteration 798 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2136956847, now seen corresponding path program 777 times [2021-06-05 05:11:24,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:24,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551972073] [2021-06-05 05:11:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:25,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551972073] [2021-06-05 05:11:25,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551972073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330235103] [2021-06-05 05:11:25,026 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 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 [2021-06-05 05:11:25,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:11:25,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:25,438 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:25,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330235103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:25,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:25,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-06-05 05:11:25,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346153452] [2021-06-05 05:11:25,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:25,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:25,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:25,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:25,439 INFO L87 Difference]: Start difference. First operand 418 states and 1104 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2021-06-05 05:11:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:25,941 INFO L93 Difference]: Finished difference Result 481 states and 1224 transitions. [2021-06-05 05:11:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:25,942 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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 [2021-06-05 05:11:25,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:25,942 INFO L225 Difference]: With dead ends: 481 [2021-06-05 05:11:25,942 INFO L226 Difference]: Without dead ends: 474 [2021-06-05 05:11:25,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 578.3ms TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:11:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-06-05 05:11:25,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 419. [2021-06-05 05:11:25,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.648325358851675) internal successors, (1107), 418 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:25,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1107 transitions. [2021-06-05 05:11:25,946 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1107 transitions. Word has length 20 [2021-06-05 05:11:25,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:25,946 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1107 transitions. [2021-06-05 05:11:25,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2021-06-05 05:11:25,946 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1107 transitions. [2021-06-05 05:11:25,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:25,947 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:25,947 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:26,147 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20933,781 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:26,147 INFO L430 AbstractCegarLoop]: === Iteration 799 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:26,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:26,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1917564301, now seen corresponding path program 778 times [2021-06-05 05:11:26,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:26,148 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802384897] [2021-06-05 05:11:26,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:26,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:26,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802384897] [2021-06-05 05:11:26,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802384897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093228184] [2021-06-05 05:11:26,291 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 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 [2021-06-05 05:11:26,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:26,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:26,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:26,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:26,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093228184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:26,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:26,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-06-05 05:11:26,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065129197] [2021-06-05 05:11:26,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:26,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:26,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:26,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:26,734 INFO L87 Difference]: Start difference. First operand 419 states and 1107 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2021-06-05 05:11:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:27,287 INFO L93 Difference]: Finished difference Result 493 states and 1248 transitions. [2021-06-05 05:11:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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 [2021-06-05 05:11:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:27,288 INFO L225 Difference]: With dead ends: 493 [2021-06-05 05:11:27,288 INFO L226 Difference]: Without dead ends: 486 [2021-06-05 05:11:27,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 621.5ms TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:27,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-06-05 05:11:27,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 420. [2021-06-05 05:11:27,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.649164677804296) internal successors, (1110), 419 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:27,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1110 transitions. [2021-06-05 05:11:27,292 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1110 transitions. Word has length 20 [2021-06-05 05:11:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:27,292 INFO L482 AbstractCegarLoop]: Abstraction has 420 states and 1110 transitions. [2021-06-05 05:11:27,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2021-06-05 05:11:27,292 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1110 transitions. [2021-06-05 05:11:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:27,292 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:27,292 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:27,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20968,782 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:27,493 INFO L430 AbstractCegarLoop]: === Iteration 800 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1217071313, now seen corresponding path program 779 times [2021-06-05 05:11:27,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:27,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595715691] [2021-06-05 05:11:27,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:27,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595715691] [2021-06-05 05:11:27,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595715691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820836053] [2021-06-05 05:11:27,632 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 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 [2021-06-05 05:11:27,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:11:27,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:27,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:27,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820836053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:27,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:27,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2021-06-05 05:11:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104214212] [2021-06-05 05:11:27,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:27,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:27,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:27,971 INFO L87 Difference]: Start difference. First operand 420 states and 1110 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) [2021-06-05 05:11:28,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:28,447 INFO L93 Difference]: Finished difference Result 507 states and 1272 transitions. [2021-06-05 05:11:28,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:28,447 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 20 [2021-06-05 05:11:28,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:28,448 INFO L225 Difference]: With dead ends: 507 [2021-06-05 05:11:28,448 INFO L226 Difference]: Without dead ends: 500 [2021-06-05 05:11:28,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 525.2ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-06-05 05:11:28,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 421. [2021-06-05 05:11:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 420 states have (on average 2.6523809523809523) internal successors, (1114), 420 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:28,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 1114 transitions. [2021-06-05 05:11:28,452 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 1114 transitions. Word has length 20 [2021-06-05 05:11:28,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:28,452 INFO L482 AbstractCegarLoop]: Abstraction has 421 states and 1114 transitions. [2021-06-05 05:11:28,452 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) [2021-06-05 05:11:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 1114 transitions. [2021-06-05 05:11:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:28,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:28,452 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:28,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 783 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21014 [2021-06-05 05:11:28,653 INFO L430 AbstractCegarLoop]: === Iteration 801 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1386311347, now seen corresponding path program 780 times [2021-06-05 05:11:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:28,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676500932] [2021-06-05 05:11:28,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:28,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:28,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676500932] [2021-06-05 05:11:28,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676500932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:28,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699761533] [2021-06-05 05:11:28,789 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 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 [2021-06-05 05:11:28,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:11:28,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:28,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:28,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:29,175 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699761533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:29,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2021-06-05 05:11:29,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290719357] [2021-06-05 05:11:29,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:29,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:29,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:29,176 INFO L87 Difference]: Start difference. First operand 421 states and 1114 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) [2021-06-05 05:11:29,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:29,651 INFO L93 Difference]: Finished difference Result 495 states and 1254 transitions. [2021-06-05 05:11:29,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:29,652 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 20 [2021-06-05 05:11:29,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:29,652 INFO L225 Difference]: With dead ends: 495 [2021-06-05 05:11:29,652 INFO L226 Difference]: Without dead ends: 488 [2021-06-05 05:11:29,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 550.5ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:11:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-06-05 05:11:29,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 419. [2021-06-05 05:11:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.648325358851675) internal successors, (1107), 418 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 1107 transitions. [2021-06-05 05:11:29,656 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 1107 transitions. Word has length 20 [2021-06-05 05:11:29,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:29,656 INFO L482 AbstractCegarLoop]: Abstraction has 419 states and 1107 transitions. [2021-06-05 05:11:29,656 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) [2021-06-05 05:11:29,656 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 1107 transitions. [2021-06-05 05:11:29,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:29,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:29,657 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:29,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 784 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21049 [2021-06-05 05:11:29,857 INFO L430 AbstractCegarLoop]: === Iteration 802 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:29,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1433116791, now seen corresponding path program 781 times [2021-06-05 05:11:29,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:29,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886467287] [2021-06-05 05:11:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:29,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:29,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:29,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886467287] [2021-06-05 05:11:29,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886467287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:29,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435941706] [2021-06-05 05:11:29,989 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 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 [2021-06-05 05:11:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:30,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435941706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:30,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:30,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 21 [2021-06-05 05:11:30,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65307415] [2021-06-05 05:11:30,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:30,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:30,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:30,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:30,361 INFO L87 Difference]: Start difference. First operand 419 states and 1107 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2021-06-05 05:11:30,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:30,975 INFO L93 Difference]: Finished difference Result 553 states and 1359 transitions. [2021-06-05 05:11:30,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:30,976 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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 [2021-06-05 05:11:30,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:30,976 INFO L225 Difference]: With dead ends: 553 [2021-06-05 05:11:30,976 INFO L226 Difference]: Without dead ends: 546 [2021-06-05 05:11:30,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:11:30,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2021-06-05 05:11:30,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 435. [2021-06-05 05:11:30,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.652073732718894) internal successors, (1151), 434 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1151 transitions. [2021-06-05 05:11:30,981 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1151 transitions. Word has length 20 [2021-06-05 05:11:30,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:30,981 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1151 transitions. [2021-06-05 05:11:30,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 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) [2021-06-05 05:11:30,981 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1151 transitions. [2021-06-05 05:11:30,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:30,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:30,981 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:31,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21097,785 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:31,182 INFO L430 AbstractCegarLoop]: === Iteration 803 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:31,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:31,182 INFO L82 PathProgramCache]: Analyzing trace with hash 732623803, now seen corresponding path program 782 times [2021-06-05 05:11:31,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:31,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36108247] [2021-06-05 05:11:31,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:31,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36108247] [2021-06-05 05:11:31,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36108247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774090971] [2021-06-05 05:11:31,315 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 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 [2021-06-05 05:11:31,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:31,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:31,624 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:31,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774090971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:31,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:31,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2021-06-05 05:11:31,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596784809] [2021-06-05 05:11:31,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:31,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:31,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:31,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:31,624 INFO L87 Difference]: Start difference. First operand 435 states and 1151 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) [2021-06-05 05:11:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:32,096 INFO L93 Difference]: Finished difference Result 571 states and 1389 transitions. [2021-06-05 05:11:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:32,096 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 20 [2021-06-05 05:11:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:32,097 INFO L225 Difference]: With dead ends: 571 [2021-06-05 05:11:32,097 INFO L226 Difference]: Without dead ends: 564 [2021-06-05 05:11:32,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 12 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 526.6ms TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:32,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-06-05 05:11:32,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 436. [2021-06-05 05:11:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.6551724137931036) internal successors, (1155), 435 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1155 transitions. [2021-06-05 05:11:32,101 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1155 transitions. Word has length 20 [2021-06-05 05:11:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:32,101 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1155 transitions. [2021-06-05 05:11:32,101 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) [2021-06-05 05:11:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1155 transitions. [2021-06-05 05:11:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:32,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:32,102 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:32,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21132,786 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:32,302 INFO L430 AbstractCegarLoop]: === Iteration 804 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:32,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:32,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1870758857, now seen corresponding path program 783 times [2021-06-05 05:11:32,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:32,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777129856] [2021-06-05 05:11:32,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:32,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:32,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777129856] [2021-06-05 05:11:32,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777129856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466438366] [2021-06-05 05:11:32,505 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 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 [2021-06-05 05:11:32,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:11:32,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:32,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:32,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:32,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:32,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466438366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:32,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:32,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-06-05 05:11:32,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740609184] [2021-06-05 05:11:32,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:32,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:32,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:32,852 INFO L87 Difference]: Start difference. First operand 436 states and 1155 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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) [2021-06-05 05:11:33,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:33,442 INFO L93 Difference]: Finished difference Result 559 states and 1371 transitions. [2021-06-05 05:11:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:33,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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 [2021-06-05 05:11:33,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:33,443 INFO L225 Difference]: With dead ends: 559 [2021-06-05 05:11:33,443 INFO L226 Difference]: Without dead ends: 552 [2021-06-05 05:11:33,443 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 663.0ms TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:33,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-06-05 05:11:33,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 436. [2021-06-05 05:11:33,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 2.6551724137931036) internal successors, (1155), 435 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1155 transitions. [2021-06-05 05:11:33,447 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1155 transitions. Word has length 20 [2021-06-05 05:11:33,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:33,447 INFO L482 AbstractCegarLoop]: Abstraction has 436 states and 1155 transitions. [2021-06-05 05:11:33,447 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 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) [2021-06-05 05:11:33,447 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1155 transitions. [2021-06-05 05:11:33,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:33,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:33,447 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:33,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 787 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21168 [2021-06-05 05:11:33,648 INFO L430 AbstractCegarLoop]: === Iteration 805 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:33,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:33,648 INFO L82 PathProgramCache]: Analyzing trace with hash 197394001, now seen corresponding path program 784 times [2021-06-05 05:11:33,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:33,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454059965] [2021-06-05 05:11:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:33,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:33,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:33,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454059965] [2021-06-05 05:11:33,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454059965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:33,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493003344] [2021-06-05 05:11:33,805 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 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 [2021-06-05 05:11:33,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:33,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:34,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:34,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493003344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:34,230 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:34,230 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 20 [2021-06-05 05:11:34,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311945237] [2021-06-05 05:11:34,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:34,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:34,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:34,230 INFO L87 Difference]: Start difference. First operand 436 states and 1155 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:34,751 INFO L93 Difference]: Finished difference Result 592 states and 1429 transitions. [2021-06-05 05:11:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:11:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:34,752 INFO L225 Difference]: With dead ends: 592 [2021-06-05 05:11:34,752 INFO L226 Difference]: Without dead ends: 585 [2021-06-05 05:11:34,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 548.3ms TimeCoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:11:34,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-06-05 05:11:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 439. [2021-06-05 05:11:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.6621004566210047) internal successors, (1166), 438 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1166 transitions. [2021-06-05 05:11:34,756 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1166 transitions. Word has length 20 [2021-06-05 05:11:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:34,756 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1166 transitions. [2021-06-05 05:11:34,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1166 transitions. [2021-06-05 05:11:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:34,757 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:34,757 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:34,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 788 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21215 [2021-06-05 05:11:34,957 INFO L430 AbstractCegarLoop]: === Iteration 806 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:34,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:34,957 INFO L82 PathProgramCache]: Analyzing trace with hash 1888978637, now seen corresponding path program 785 times [2021-06-05 05:11:34,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:34,957 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278875002] [2021-06-05 05:11:34,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:34,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:35,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:35,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278875002] [2021-06-05 05:11:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278875002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824756096] [2021-06-05 05:11:35,088 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 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 [2021-06-05 05:11:35,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:11:35,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:35,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:35,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824756096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:35,512 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:35,512 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2021-06-05 05:11:35,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144597047] [2021-06-05 05:11:35,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:11:35,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:35,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:11:35,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=296, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:11:35,513 INFO L87 Difference]: Start difference. First operand 439 states and 1166 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) [2021-06-05 05:11:36,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:36,032 INFO L93 Difference]: Finished difference Result 594 states and 1431 transitions. [2021-06-05 05:11:36,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:11:36,032 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 20 [2021-06-05 05:11:36,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:36,033 INFO L225 Difference]: With dead ends: 594 [2021-06-05 05:11:36,033 INFO L226 Difference]: Without dead ends: 587 [2021-06-05 05:11:36,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 510.8ms TimeCoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:36,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-06-05 05:11:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 438. [2021-06-05 05:11:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 437 states have (on average 2.6590389016018308) internal successors, (1162), 437 states have internal predecessors, (1162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 1162 transitions. [2021-06-05 05:11:36,038 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 1162 transitions. Word has length 20 [2021-06-05 05:11:36,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:36,038 INFO L482 AbstractCegarLoop]: Abstraction has 438 states and 1162 transitions. [2021-06-05 05:11:36,038 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) [2021-06-05 05:11:36,038 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 1162 transitions. [2021-06-05 05:11:36,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:36,038 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:36,038 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:36,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21316,789 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:36,239 INFO L430 AbstractCegarLoop]: === Iteration 807 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:36,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:36,239 INFO L82 PathProgramCache]: Analyzing trace with hash 2062226329, now seen corresponding path program 786 times [2021-06-05 05:11:36,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:36,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027813063] [2021-06-05 05:11:36,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:36,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:36,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027813063] [2021-06-05 05:11:36,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027813063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:36,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552609999] [2021-06-05 05:11:36,486 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 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 [2021-06-05 05:11:36,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:11:36,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:37,021 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:37,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552609999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:37,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:11:37,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315800213] [2021-06-05 05:11:37,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:11:37,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:11:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:37,021 INFO L87 Difference]: Start difference. First operand 438 states and 1162 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) [2021-06-05 05:11:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:37,495 INFO L93 Difference]: Finished difference Result 487 states and 1255 transitions. [2021-06-05 05:11:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:11:37,495 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 [2021-06-05 05:11:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:37,495 INFO L225 Difference]: With dead ends: 487 [2021-06-05 05:11:37,495 INFO L226 Difference]: Without dead ends: 480 [2021-06-05 05:11:37,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 671.3ms TimeCoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:11:37,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-06-05 05:11:37,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 444. [2021-06-05 05:11:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.6523702031602707) internal successors, (1175), 443 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1175 transitions. [2021-06-05 05:11:37,499 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1175 transitions. Word has length 20 [2021-06-05 05:11:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:37,499 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1175 transitions. [2021-06-05 05:11:37,500 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) [2021-06-05 05:11:37,500 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1175 transitions. [2021-06-05 05:11:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:37,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:37,500 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:37,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 790 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21415 [2021-06-05 05:11:37,701 INFO L430 AbstractCegarLoop]: === Iteration 808 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash 785139323, now seen corresponding path program 787 times [2021-06-05 05:11:37,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:37,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703704276] [2021-06-05 05:11:37,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:37,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:37,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:37,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703704276] [2021-06-05 05:11:37,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703704276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:37,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213785] [2021-06-05 05:11:37,850 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 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 [2021-06-05 05:11:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:37,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:38,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:38,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:38,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 05:11:38,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436311463] [2021-06-05 05:11:38,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:38,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:38,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:38,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:38,343 INFO L87 Difference]: Start difference. First operand 444 states and 1175 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:11:39,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:39,048 INFO L93 Difference]: Finished difference Result 574 states and 1402 transitions. [2021-06-05 05:11:39,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:39,048 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:11:39,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:39,049 INFO L225 Difference]: With dead ends: 574 [2021-06-05 05:11:39,049 INFO L226 Difference]: Without dead ends: 567 [2021-06-05 05:11:39,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:39,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-06-05 05:11:39,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 444. [2021-06-05 05:11:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.6523702031602707) internal successors, (1175), 443 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1175 transitions. [2021-06-05 05:11:39,054 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1175 transitions. Word has length 20 [2021-06-05 05:11:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:39,054 INFO L482 AbstractCegarLoop]: Abstraction has 444 states and 1175 transitions. [2021-06-05 05:11:39,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:11:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1175 transitions. [2021-06-05 05:11:39,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:39,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:39,054 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:39,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 791 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21524 [2021-06-05 05:11:39,255 INFO L430 AbstractCegarLoop]: === Iteration 809 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1818243337, now seen corresponding path program 788 times [2021-06-05 05:11:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:39,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594395649] [2021-06-05 05:11:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:39,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594395649] [2021-06-05 05:11:39,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594395649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332147415] [2021-06-05 05:11:39,411 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 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 [2021-06-05 05:11:39,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:39,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:39,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:39,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:39,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:39,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332147415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:39,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:39,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 20 [2021-06-05 05:11:39,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706548311] [2021-06-05 05:11:39,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 05:11:39,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:39,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 05:11:39,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:11:39,855 INFO L87 Difference]: Start difference. First operand 444 states and 1175 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:11:40,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:40,562 INFO L93 Difference]: Finished difference Result 575 states and 1402 transitions. [2021-06-05 05:11:40,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:40,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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 [2021-06-05 05:11:40,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:40,563 INFO L225 Difference]: With dead ends: 575 [2021-06-05 05:11:40,563 INFO L226 Difference]: Without dead ends: 568 [2021-06-05 05:11:40,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 690.2ms TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:40,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2021-06-05 05:11:40,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 441. [2021-06-05 05:11:40,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 440 states have (on average 2.6454545454545455) internal successors, (1164), 440 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:40,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 1164 transitions. [2021-06-05 05:11:40,567 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 1164 transitions. Word has length 20 [2021-06-05 05:11:40,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:40,567 INFO L482 AbstractCegarLoop]: Abstraction has 441 states and 1164 transitions. [2021-06-05 05:11:40,567 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 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) [2021-06-05 05:11:40,567 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 1164 transitions. [2021-06-05 05:11:40,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:40,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:40,568 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:40,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21656,792 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:40,768 INFO L430 AbstractCegarLoop]: === Iteration 810 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:40,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1644995645, now seen corresponding path program 789 times [2021-06-05 05:11:40,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:40,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111755152] [2021-06-05 05:11:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:40,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:40,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111755152] [2021-06-05 05:11:40,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111755152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:40,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443516212] [2021-06-05 05:11:40,916 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 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 [2021-06-05 05:11:40,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:11:40,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:40,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:40,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:41,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443516212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:41,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:41,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:11:41,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163084856] [2021-06-05 05:11:41,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:41,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:41,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:41,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:41,368 INFO L87 Difference]: Start difference. First operand 441 states and 1164 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:11:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:42,199 INFO L93 Difference]: Finished difference Result 578 states and 1394 transitions. [2021-06-05 05:11:42,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 05:11:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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 20 [2021-06-05 05:11:42,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:42,200 INFO L225 Difference]: With dead ends: 578 [2021-06-05 05:11:42,200 INFO L226 Difference]: Without dead ends: 571 [2021-06-05 05:11:42,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 792.2ms TimeCoverageRelationStatistics Valid=133, Invalid=1057, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:42,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-06-05 05:11:42,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 435. [2021-06-05 05:11:42,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.652073732718894) internal successors, (1151), 434 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1151 transitions. [2021-06-05 05:11:42,204 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1151 transitions. Word has length 20 [2021-06-05 05:11:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:42,204 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1151 transitions. [2021-06-05 05:11:42,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:11:42,204 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1151 transitions. [2021-06-05 05:11:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:42,205 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:42,205 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:42,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 793 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21755 [2021-06-05 05:11:42,405 INFO L430 AbstractCegarLoop]: === Iteration 811 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:42,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:42,406 INFO L82 PathProgramCache]: Analyzing trace with hash -569284489, now seen corresponding path program 790 times [2021-06-05 05:11:42,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:42,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204937176] [2021-06-05 05:11:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:42,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:11:42,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:42,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204937176] [2021-06-05 05:11:42,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204937176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:42,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703713892] [2021-06-05 05:11:42,554 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 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 [2021-06-05 05:11:42,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:42,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:42,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:43,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703713892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:43,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:43,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-06-05 05:11:43,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013438703] [2021-06-05 05:11:43,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:43,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:43,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:43,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:43,047 INFO L87 Difference]: Start difference. First operand 435 states and 1151 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:11:43,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:43,731 INFO L93 Difference]: Finished difference Result 555 states and 1356 transitions. [2021-06-05 05:11:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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 20 [2021-06-05 05:11:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:43,732 INFO L225 Difference]: With dead ends: 555 [2021-06-05 05:11:43,732 INFO L226 Difference]: Without dead ends: 548 [2021-06-05 05:11:43,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 740.7ms TimeCoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:11:43,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 548 states. [2021-06-05 05:11:43,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 548 to 435. [2021-06-05 05:11:43,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.652073732718894) internal successors, (1151), 434 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:43,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1151 transitions. [2021-06-05 05:11:43,736 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1151 transitions. Word has length 20 [2021-06-05 05:11:43,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:43,736 INFO L482 AbstractCegarLoop]: Abstraction has 435 states and 1151 transitions. [2021-06-05 05:11:43,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 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) [2021-06-05 05:11:43,736 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1151 transitions. [2021-06-05 05:11:43,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:43,737 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:43,737 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:43,937 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21839,794 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:43,937 INFO L430 AbstractCegarLoop]: === Iteration 812 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:43,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1825375121, now seen corresponding path program 791 times [2021-06-05 05:11:43,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:43,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625228961] [2021-06-05 05:11:43,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625228961] [2021-06-05 05:11:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625228961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837806860] [2021-06-05 05:11:44,146 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 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 [2021-06-05 05:11:44,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:11:44,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:44,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:44,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:44,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:44,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837806860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:44,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:44,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 21 [2021-06-05 05:11:44,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969459440] [2021-06-05 05:11:44,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:11:44,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:44,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:11:44,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:11:44,692 INFO L87 Difference]: Start difference. First operand 435 states and 1151 transitions. Second operand has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:11:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:45,494 INFO L93 Difference]: Finished difference Result 647 states and 1533 transitions. [2021-06-05 05:11:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:45,494 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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 [2021-06-05 05:11:45,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:45,495 INFO L225 Difference]: With dead ends: 647 [2021-06-05 05:11:45,495 INFO L226 Difference]: Without dead ends: 640 [2021-06-05 05:11:45,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 779.3ms TimeCoverageRelationStatistics Valid=126, Invalid=1064, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-06-05 05:11:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 445. [2021-06-05 05:11:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.668918918918919) internal successors, (1185), 444 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1185 transitions. [2021-06-05 05:11:45,499 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1185 transitions. Word has length 20 [2021-06-05 05:11:45,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:45,499 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1185 transitions. [2021-06-05 05:11:45,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 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) [2021-06-05 05:11:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1185 transitions. [2021-06-05 05:11:45,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:45,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:45,500 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:45,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 795 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21953 [2021-06-05 05:11:45,701 INFO L430 AbstractCegarLoop]: === Iteration 813 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:45,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash -778007539, now seen corresponding path program 792 times [2021-06-05 05:11:45,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:45,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930243386] [2021-06-05 05:11:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:45,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:45,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930243386] [2021-06-05 05:11:45,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930243386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:45,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036673310] [2021-06-05 05:11:45,940 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 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 [2021-06-05 05:11:45,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:11:45,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:45,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 05:11:45,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,464 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,464 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 30 treesize of output 22 [2021-06-05 05:11:46,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,469 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,470 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,470 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 30 treesize of output 22 [2021-06-05 05:11:46,471 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,475 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,476 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 30 treesize of output 22 [2021-06-05 05:11:46,476 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,482 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 37 treesize of output 27 [2021-06-05 05:11:46,483 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,487 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,488 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 37 treesize of output 27 [2021-06-05 05:11:46,488 INFO L550 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,494 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 37 treesize of output 27 [2021-06-05 05:11:46,494 INFO L550 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,499 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,500 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 30 treesize of output 22 [2021-06-05 05:11:46,500 INFO L550 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,506 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 29 treesize of output 21 [2021-06-05 05:11:46,506 INFO L550 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,511 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,511 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 31 treesize of output 23 [2021-06-05 05:11:46,512 INFO L550 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,517 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 30 treesize of output 22 [2021-06-05 05:11:46,518 INFO L550 ElimStorePlain]: Start of recursive call 11: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-06-05 05:11:46,524 INFO L550 ElimStorePlain]: Start of recursive call 12: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,528 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,529 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 43 treesize of output 31 [2021-06-05 05:11:46,530 INFO L550 ElimStorePlain]: Start of recursive call 13: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,535 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 38 treesize of output 28 [2021-06-05 05:11:46,536 INFO L550 ElimStorePlain]: Start of recursive call 14: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,541 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,541 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 31 treesize of output 23 [2021-06-05 05:11:46,542 INFO L550 ElimStorePlain]: Start of recursive call 15: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,546 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:46,547 INFO L550 ElimStorePlain]: Start of recursive call 16: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,552 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,552 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 31 treesize of output 23 [2021-06-05 05:11:46,553 INFO L550 ElimStorePlain]: Start of recursive call 17: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,558 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 44 treesize of output 32 [2021-06-05 05:11:46,559 INFO L550 ElimStorePlain]: Start of recursive call 18: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,564 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 38 treesize of output 28 [2021-06-05 05:11:46,565 INFO L550 ElimStorePlain]: Start of recursive call 19: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,569 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-06-05 05:11:46,571 INFO L550 ElimStorePlain]: Start of recursive call 20: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:11:46,577 INFO L550 ElimStorePlain]: Start of recursive call 21: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,582 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 30 treesize of output 22 [2021-06-05 05:11:46,582 INFO L550 ElimStorePlain]: Start of recursive call 22: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,587 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,587 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 45 treesize of output 33 [2021-06-05 05:11:46,588 INFO L550 ElimStorePlain]: Start of recursive call 23: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,593 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:46,593 INFO L550 ElimStorePlain]: Start of recursive call 24: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,597 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:46,598 INFO L550 ElimStorePlain]: Start of recursive call 25: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,602 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:46,602 INFO L550 ElimStorePlain]: Start of recursive call 26: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,607 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 38 treesize of output 28 [2021-06-05 05:11:46,611 INFO L550 ElimStorePlain]: Start of recursive call 27: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,615 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:46,615 INFO L550 ElimStorePlain]: Start of recursive call 28: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,619 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,620 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 38 treesize of output 28 [2021-06-05 05:11:46,621 INFO L550 ElimStorePlain]: Start of recursive call 29: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,625 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,625 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 37 treesize of output 27 [2021-06-05 05:11:46,626 INFO L550 ElimStorePlain]: Start of recursive call 30: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,630 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:46,630 INFO L550 ElimStorePlain]: Start of recursive call 31: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,634 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-06-05 05:11:46,635 INFO L550 ElimStorePlain]: Start of recursive call 32: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,639 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 37 treesize of output 27 [2021-06-05 05:11:46,640 INFO L550 ElimStorePlain]: Start of recursive call 33: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,644 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,645 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 30 treesize of output 22 [2021-06-05 05:11:46,645 INFO L550 ElimStorePlain]: Start of recursive call 34: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,650 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 37 treesize of output 27 [2021-06-05 05:11:46,650 INFO L550 ElimStorePlain]: Start of recursive call 35: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,654 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,655 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 37 treesize of output 27 [2021-06-05 05:11:46,656 INFO L550 ElimStorePlain]: Start of recursive call 36: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:11:46,659 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 44 treesize of output 32 [2021-06-05 05:11:46,660 INFO L550 ElimStorePlain]: Start of recursive call 37: End of recursive call: and 1 xjuncts. [2021-06-05 05:11:46,759 INFO L628 ElimStorePlain]: treesize reduction 571, result has 12.2 percent of original size [2021-06-05 05:11:46,760 INFO L518 ElimStorePlain]: Eliminatee array_3 vanished before elimination [2021-06-05 05:11:46,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 3 xjuncts. [2021-06-05 05:11:46,761 INFO L247 ElimStorePlain]: Needed 37 recursive calls to eliminate 3 variables, input treesize:2161, output treesize:55 [2021-06-05 05:11:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:46,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036673310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:46,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:46,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-05 05:11:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614905594] [2021-06-05 05:11:46,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:11:46,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:46,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:11:46,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:11:46,900 INFO L87 Difference]: Start difference. First operand 445 states and 1185 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) [2021-06-05 05:11:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:47,828 INFO L93 Difference]: Finished difference Result 678 states and 1580 transitions. [2021-06-05 05:11:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:11:47,828 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 [2021-06-05 05:11:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:47,829 INFO L225 Difference]: With dead ends: 678 [2021-06-05 05:11:47,829 INFO L226 Difference]: Without dead ends: 664 [2021-06-05 05:11:47,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1052.2ms TimeCoverageRelationStatistics Valid=154, Invalid=1406, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:11:47,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-06-05 05:11:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 442. [2021-06-05 05:11:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.6621315192743764) internal successors, (1174), 441 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:47,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1174 transitions. [2021-06-05 05:11:47,834 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1174 transitions. Word has length 20 [2021-06-05 05:11:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:47,834 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1174 transitions. [2021-06-05 05:11:47,834 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) [2021-06-05 05:11:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1174 transitions. [2021-06-05 05:11:47,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:47,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:47,834 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:48,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22085,796 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:48,035 INFO L430 AbstractCegarLoop]: === Iteration 814 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:48,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:48,035 INFO L82 PathProgramCache]: Analyzing trace with hash -604759847, now seen corresponding path program 793 times [2021-06-05 05:11:48,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:48,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505916375] [2021-06-05 05:11:48,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:48,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505916375] [2021-06-05 05:11:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505916375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134641233] [2021-06-05 05:11:48,338 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 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 [2021-06-05 05:11:48,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:48,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:48,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:48,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:48,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134641233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:48,845 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:48,845 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:48,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786978684] [2021-06-05 05:11:48,845 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:48,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:48,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:48,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:48,845 INFO L87 Difference]: Start difference. First operand 442 states and 1174 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:49,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:49,824 INFO L93 Difference]: Finished difference Result 652 states and 1530 transitions. [2021-06-05 05:11:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:11:49,824 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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 [2021-06-05 05:11:49,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:49,825 INFO L225 Difference]: With dead ends: 652 [2021-06-05 05:11:49,825 INFO L226 Difference]: Without dead ends: 645 [2021-06-05 05:11:49,825 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1072.4ms TimeCoverageRelationStatistics Valid=131, Invalid=1201, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:11:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2021-06-05 05:11:49,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 442. [2021-06-05 05:11:49,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.6621315192743764) internal successors, (1174), 441 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:49,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1174 transitions. [2021-06-05 05:11:49,829 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1174 transitions. Word has length 20 [2021-06-05 05:11:49,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:49,830 INFO L482 AbstractCegarLoop]: Abstraction has 442 states and 1174 transitions. [2021-06-05 05:11:49,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 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) [2021-06-05 05:11:49,830 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1174 transitions. [2021-06-05 05:11:49,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:49,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:49,830 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:50,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 797 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22202 [2021-06-05 05:11:50,030 INFO L430 AbstractCegarLoop]: === Iteration 815 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:50,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:50,031 INFO L82 PathProgramCache]: Analyzing trace with hash 470951309, now seen corresponding path program 794 times [2021-06-05 05:11:50,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:50,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753226618] [2021-06-05 05:11:50,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:50,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:50,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:50,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753226618] [2021-06-05 05:11:50,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753226618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:50,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522798821] [2021-06-05 05:11:50,248 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 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 [2021-06-05 05:11:50,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:11:50,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:50,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:50,812 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:50,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522798821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:50,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:50,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:11:50,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258167100] [2021-06-05 05:11:50,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:50,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:50,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:50,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:50,813 INFO L87 Difference]: Start difference. First operand 442 states and 1174 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-06-05 05:11:51,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:51,700 INFO L93 Difference]: Finished difference Result 648 states and 1514 transitions. [2021-06-05 05:11:51,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:11:51,700 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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 20 [2021-06-05 05:11:51,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:51,701 INFO L225 Difference]: With dead ends: 648 [2021-06-05 05:11:51,701 INFO L226 Difference]: Without dead ends: 631 [2021-06-05 05:11:51,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 911.8ms TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:11:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 631 states. [2021-06-05 05:11:51,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 631 to 439. [2021-06-05 05:11:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.664383561643836) internal successors, (1167), 438 states have internal predecessors, (1167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:51,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1167 transitions. [2021-06-05 05:11:51,705 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1167 transitions. Word has length 20 [2021-06-05 05:11:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:51,705 INFO L482 AbstractCegarLoop]: Abstraction has 439 states and 1167 transitions. [2021-06-05 05:11:51,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-06-05 05:11:51,705 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1167 transitions. [2021-06-05 05:11:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:51,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:51,706 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:51,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22294,798 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:51,906 INFO L430 AbstractCegarLoop]: === Iteration 816 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:51,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:51,906 INFO L82 PathProgramCache]: Analyzing trace with hash -541741223, now seen corresponding path program 795 times [2021-06-05 05:11:51,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:51,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785271075] [2021-06-05 05:11:51,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:52,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785271075] [2021-06-05 05:11:52,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785271075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014353011] [2021-06-05 05:11:52,104 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 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 [2021-06-05 05:11:52,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:11:52,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:52,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:52,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014353011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:52,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:52,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 22 [2021-06-05 05:11:52,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996951474] [2021-06-05 05:11:52,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 05:11:52,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:52,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 05:11:52,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:11:52,651 INFO L87 Difference]: Start difference. First operand 439 states and 1167 transitions. Second operand has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-06-05 05:11:53,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:53,275 INFO L93 Difference]: Finished difference Result 598 states and 1432 transitions. [2021-06-05 05:11:53,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:11:53,276 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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 20 [2021-06-05 05:11:53,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:53,276 INFO L225 Difference]: With dead ends: 598 [2021-06-05 05:11:53,276 INFO L226 Difference]: Without dead ends: 591 [2021-06-05 05:11:53,277 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 651.3ms TimeCoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:11:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-06-05 05:11:53,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 445. [2021-06-05 05:11:53,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.6531531531531534) internal successors, (1178), 444 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:53,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1178 transitions. [2021-06-05 05:11:53,281 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1178 transitions. Word has length 20 [2021-06-05 05:11:53,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:53,281 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1178 transitions. [2021-06-05 05:11:53,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 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) [2021-06-05 05:11:53,281 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1178 transitions. [2021-06-05 05:11:53,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:53,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:53,281 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:53,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 799 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22418 [2021-06-05 05:11:53,482 INFO L430 AbstractCegarLoop]: === Iteration 817 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:53,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:53,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1034406237, now seen corresponding path program 796 times [2021-06-05 05:11:53,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:53,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179786673] [2021-06-05 05:11:53,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:53,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:53,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179786673] [2021-06-05 05:11:53,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179786673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:53,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777829146] [2021-06-05 05:11:53,760 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 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 [2021-06-05 05:11:53,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:11:53,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:53,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:53,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:54,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777829146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:54,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:54,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:54,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369069057] [2021-06-05 05:11:54,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:54,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:54,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:54,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:54,292 INFO L87 Difference]: Start difference. First operand 445 states and 1178 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:54,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:54,761 INFO L93 Difference]: Finished difference Result 658 states and 1559 transitions. [2021-06-05 05:11:54,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 05:11:54,762 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:11:54,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:54,762 INFO L225 Difference]: With dead ends: 658 [2021-06-05 05:11:54,762 INFO L226 Difference]: Without dead ends: 651 [2021-06-05 05:11:54,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 739.5ms TimeCoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:11:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-06-05 05:11:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 461. [2021-06-05 05:11:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.6782608695652175) internal successors, (1232), 460 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 1232 transitions. [2021-06-05 05:11:54,767 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 1232 transitions. Word has length 20 [2021-06-05 05:11:54,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:54,767 INFO L482 AbstractCegarLoop]: Abstraction has 461 states and 1232 transitions. [2021-06-05 05:11:54,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:54,767 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 1232 transitions. [2021-06-05 05:11:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:54,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:54,768 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:54,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22541,800 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:54,968 INFO L430 AbstractCegarLoop]: === Iteration 818 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:54,968 INFO L82 PathProgramCache]: Analyzing trace with hash -174920481, now seen corresponding path program 797 times [2021-06-05 05:11:54,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:54,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118453270] [2021-06-05 05:11:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:55,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:55,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:55,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118453270] [2021-06-05 05:11:55,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118453270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:55,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894175956] [2021-06-05 05:11:55,233 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 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 [2021-06-05 05:11:55,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:11:55,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:55,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:55,738 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:55,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894175956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:55,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:55,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:55,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020733180] [2021-06-05 05:11:55,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:55,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:55,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:55,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:55,738 INFO L87 Difference]: Start difference. First operand 461 states and 1232 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:56,626 INFO L93 Difference]: Finished difference Result 732 states and 1685 transitions. [2021-06-05 05:11:56,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:11:56,626 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:11:56,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:56,627 INFO L225 Difference]: With dead ends: 732 [2021-06-05 05:11:56,627 INFO L226 Difference]: Without dead ends: 718 [2021-06-05 05:11:56,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 979.4ms TimeCoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:11:56,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2021-06-05 05:11:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 465. [2021-06-05 05:11:56,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.6831896551724137) internal successors, (1245), 464 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:56,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1245 transitions. [2021-06-05 05:11:56,636 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1245 transitions. Word has length 20 [2021-06-05 05:11:56,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:56,636 INFO L482 AbstractCegarLoop]: Abstraction has 465 states and 1245 transitions. [2021-06-05 05:11:56,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:56,636 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1245 transitions. [2021-06-05 05:11:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:56,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:56,637 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:56,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 801 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22588 [2021-06-05 05:11:56,837 INFO L430 AbstractCegarLoop]: === Iteration 819 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:56,837 INFO L82 PathProgramCache]: Analyzing trace with hash 961183523, now seen corresponding path program 798 times [2021-06-05 05:11:56,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:56,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017430767] [2021-06-05 05:11:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:57,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017430767] [2021-06-05 05:11:57,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017430767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:57,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592606084] [2021-06-05 05:11:57,100 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 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 [2021-06-05 05:11:57,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:11:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:11:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:57,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:57,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592606084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:57,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:57,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:57,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579599636] [2021-06-05 05:11:57,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:57,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:57,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:57,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:57,629 INFO L87 Difference]: Start difference. First operand 465 states and 1245 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:11:58,581 INFO L93 Difference]: Finished difference Result 735 states and 1698 transitions. [2021-06-05 05:11:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:11:58,582 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:11:58,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:11:58,583 INFO L225 Difference]: With dead ends: 735 [2021-06-05 05:11:58,583 INFO L226 Difference]: Without dead ends: 721 [2021-06-05 05:11:58,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 990.3ms TimeCoverageRelationStatistics Valid=110, Invalid=1012, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:11:58,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-06-05 05:11:58,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 468. [2021-06-05 05:11:58,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.6873661670235545) internal successors, (1255), 467 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1255 transitions. [2021-06-05 05:11:58,588 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1255 transitions. Word has length 20 [2021-06-05 05:11:58,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:11:58,588 INFO L482 AbstractCegarLoop]: Abstraction has 468 states and 1255 transitions. [2021-06-05 05:11:58,588 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:11:58,588 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1255 transitions. [2021-06-05 05:11:58,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:11:58,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:11:58,588 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:11:58,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22622,802 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:11:58,789 INFO L430 AbstractCegarLoop]: === Iteration 820 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:11:58,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:11:58,789 INFO L82 PathProgramCache]: Analyzing trace with hash 720737375, now seen corresponding path program 799 times [2021-06-05 05:11:58,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:11:58,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614187802] [2021-06-05 05:11:58,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:11:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:59,028 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:59,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:11:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614187802] [2021-06-05 05:11:59,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614187802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:59,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994841937] [2021-06-05 05:11:59,028 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 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 [2021-06-05 05:11:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:11:59,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:11:59,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:11:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:11:59,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994841937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:11:59,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:11:59,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2021-06-05 05:11:59,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250592539] [2021-06-05 05:11:59,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-05 05:11:59,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:11:59,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-05 05:11:59,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:11:59,540 INFO L87 Difference]: Start difference. First operand 468 states and 1255 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:12:00,580 INFO L93 Difference]: Finished difference Result 722 states and 1685 transitions. [2021-06-05 05:12:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:12:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 05:12:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:12:00,581 INFO L225 Difference]: With dead ends: 722 [2021-06-05 05:12:00,582 INFO L226 Difference]: Without dead ends: 708 [2021-06-05 05:12:00,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1018.8ms TimeCoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:12:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-06-05 05:12:00,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 470. [2021-06-05 05:12:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 2.6908315565031984) internal successors, (1262), 469 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:00,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 1262 transitions. [2021-06-05 05:12:00,587 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 1262 transitions. Word has length 20 [2021-06-05 05:12:00,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:12:00,587 INFO L482 AbstractCegarLoop]: Abstraction has 470 states and 1262 transitions. [2021-06-05 05:12:00,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:12:00,587 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 1262 transitions. [2021-06-05 05:12:00,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 05:12:00,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:12:00,587 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] Received shutdown request... [2021-06-05 05:12:00,798 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22669,803 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:00,798 INFO L430 AbstractCegarLoop]: === Iteration 821 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:12:00,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:12:00,799 INFO L82 PathProgramCache]: Analyzing trace with hash 20244387, now seen corresponding path program 800 times [2021-06-05 05:12:00,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:12:00,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941244053] [2021-06-05 05:12:00,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:12:00,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2021-06-05 05:12:00,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140435656] [2021-06-05 05:12:00,803 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 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 [2021-06-05 05:12:00,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:12:00,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:12:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 05:12:00,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:12:00,837 WARN L222 SmtUtils]: Removed 1 from assertion stack [2021-06-05 05:12:01,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22704,804 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:12:01,037 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:12:01,039 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:12:01,040 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:12:01,040 INFO L202 PluginConnector]: Adding new model word-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:12:01 BasicIcfg [2021-06-05 05:12:01,040 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:12:01,041 INFO L168 Benchmark]: Toolchain (without parser) took 894014.37 ms. Allocated memory was 337.6 MB in the beginning and 511.7 MB in the end (delta: 174.1 MB). Free memory was 316.2 MB in the beginning and 376.7 MB in the end (delta: -60.5 MB). Peak memory consumption was 115.2 MB. Max. memory is 16.0 GB. [2021-06-05 05:12:01,041 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 337.6 MB. Free memory is still 317.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:12:01,041 INFO L168 Benchmark]: Boogie Procedure Inliner took 17.17 ms. Allocated memory is still 337.6 MB. Free memory was 316.1 MB in the beginning and 314.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 05:12:01,041 INFO L168 Benchmark]: Boogie Preprocessor took 11.01 ms. Allocated memory is still 337.6 MB. Free memory was 314.6 MB in the beginning and 313.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:12:01,041 INFO L168 Benchmark]: RCFGBuilder took 279.50 ms. Allocated memory is still 337.6 MB. Free memory was 313.5 MB in the beginning and 320.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. [2021-06-05 05:12:01,041 INFO L168 Benchmark]: TraceAbstraction took 893703.23 ms. Allocated memory was 337.6 MB in the beginning and 511.7 MB in the end (delta: 174.1 MB). Free memory was 319.5 MB in the beginning and 376.7 MB in the end (delta: -57.2 MB). Peak memory consumption was 116.9 MB. Max. memory is 16.0 GB. [2021-06-05 05:12:01,041 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 0.11 ms. Allocated memory is still 337.6 MB. Free memory is still 317.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 17.17 ms. Allocated memory is still 337.6 MB. Free memory was 316.1 MB in the beginning and 314.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 11.01 ms. Allocated memory is still 337.6 MB. Free memory was 314.6 MB in the beginning and 313.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 279.50 ms. Allocated memory is still 337.6 MB. Free memory was 313.5 MB in the beginning and 320.6 MB in the end (delta: -7.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 893703.23 ms. Allocated memory was 337.6 MB in the beginning and 511.7 MB in the end (delta: 174.1 MB). Free memory was 319.5 MB in the beginning and 376.7 MB in the end (delta: -57.2 MB). Peak memory consumption was 116.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - TimeoutResultAtElement [Line: 90]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 21 with TraceHistMax 4,while TraceCheckSpWp was constructing forward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 3 for 0ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 27 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 893654.1ms, OverallIterations: 821, TraceHistogramMax: 4, EmptinessCheckTime: 234.0ms, AutomataDifference: 380509.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 30538 SDtfs, 47541 SDslu, 250303 SDs, 0 SdLazy, 311132 SolverSat, 10898 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 125514.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29387 GetRequests, 9075 SyntacticMatches, 2083 SemanticMatches, 18229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100610 ImplicationChecksByTransitivity, 416259.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=470occurred in iteration=820, InterpolantAutomatonStates: 15106, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 1859.4ms AutomataMinimizationTime, 820 MinimizatonAttempts, 75107 StatesRemovedByMinimization, 814 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2867.7ms SsaConstructionTime, 10686.9ms SatisfiabilityAnalysisTime, 320721.9ms InterpolantComputationTime, 29048 NumberOfCodeBlocks, 29048 NumberOfCodeBlocksAsserted, 2751 NumberOfCheckSat, 27426 ConstructedInterpolants, 1285 QuantifiedInterpolants, 394405 SizeOfPredicates, 5496 NumberOfNonLiveVariables, 65588 ConjunctsInSsa, 17287 ConjunctsInUnsatCore, 1622 InterpolantComputations, 18 PerfectInterpolantSequences, 2596/20251 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